Dr Caroline Leaf – Better graphics, same content

Posted on September 4, 2015 by cedwardpitt

In the world of marketing, visual media is king. Humans are sight based creatures. About thirty percent of our brains cortex is dedicated to vision , compared to 8 percent for touch and 2 percent for hearing http://channel.nationalgeographic.com/brain-games/articles/brain-games-watch-this-perception-facts/)

It’s no wonder then that sites like Pinterest and Instagram have so rapidly become such dominant sites on the social media landscape. And why billions of dollars are invested in visual advertising on TV and billboards.

Dr Caroline Leaf is a communication pathologist and self titled cognitive neuroscientist. In the last few weeks, she’s gone for a new look for her Instagram and Facebook posts – gone are the simple lines, plain text and stand alone logo. Her posts have gone glam, with backgrounds of her photo treated with coloured layering and shading, overlaid with Dr Leafs favourite text. Sometimes the text is pretty easy to read. Other times it looks like a 4th grade class got to take turns picking the font and text size for each different word. But hey, it’s edgy, it’s happening, it’s so hot right now.

It’s a real shame that she only chose to update the look and not the actual content of her social media memes. Take today’s offering as an example: “The mind processes. The brain reflects this processing.” (The unsaid conclusion being that, “The mind controls the brain.”)

I’ve written about this meme a few times (here, here, here and here, as a small sample). But let’s relook at it again, since Dr Leaf is unwilling to reconsider the statements lack of validity.

Does the mind really control the brain, or does the brain control the mind? Well, if the mind was separate from the brain and controlled the brain, then the mind would be able to function independently of the brain. And also, if the mind was separate to the brain, then changes to the brain would not influence the function of the mind.

It’s difficult to show that a person has a mind without a brain. You can’t really remove someone’s brain and then put it back again, so not many people are keen to volunteer for that study. But anecdotally, have you ever heard of a person who has woken from a coma having spend all that time in deep thought?

What IS much easier to study, and has been proven over the course of centuries, is the change to our cognitive function when our brain is changed, physically or functionally.

The mind changes when the function of the brain is changed by medications.
The mind changes when the function of the brain is changed by illicit drugs.
The mind changes when the function of the brain is changed by electrical stimulation.
The mind changes then the structure of the brain is changed by tumours or injuries.

In 1848, a man named Phineas Gage was packing gunpowder in some rock when an accidental detonation blasted a foot-long iron rod through the left face and forehead, severely damaging the left frontal lobe of his brain. History records that his personality changed from polite, well mannered, and well spoken to fitful, irreverent, impatient of restraint or advice, obstinate and capricious [1].

Whilst Phineas Gage was is most famous, other brain injuries can also change the way in which someone thinks. For example, lesions of the parietal lobe of the brain changes the way people see their own bodies. Baars writes, “Patients suffering from right parietal neglect can have disturbing alien experiences of their own bodies, especially of the left arm and leg. Such patients sometimes believe that their left leg belongs to someone else (often a relative), and can desperately try to throw it out of bed. Thus, parietal regions seem to shape contextually both the experience of the visual world and of one’s own body.” [2]

Some might argue that the mechanism of injury might be the variable that could change someone’s personality. After all, if an iron rod was blasted through my skull, I might be a little antsy too. But other structural change to the brain, not associated with a sudden traumatic event, can also result in personality changes – it’s well recognised that personality changes can be the first presenting symptom of brain tumours, for example.

Though the brain doesn’t have to be horribly distorted for the mind to change. In the last couple of decades, a tool has been developed called TMS – short for transcranial magnetic stimulation. A magnetic pulse is delivered over a part of the skull, passing through the bone to reach the brain, causing changes to the electrical current running through the nerve cells. Stimulation of different intensities can either turn off the nerve cells or excite them. TMS has become a great tool for studying cognitive neuroscience because it directly changes the function of the brain in a well localised and temporary manner. It’s also easy for scientists to blind the subjects to whether they’re receiving the treatment or a sham treatment, so the results are reliable. Research shows that when the frontal lobes of the brain are changed by the electrical signals, their executive function also changes [3].

Changes to the function of the brain are known to change the function of the mind and have been known to do so for centuries. From religious hallucinogens to Woodstock hippies, drugs of various forms have been used to alter mood, thought, and perceptions of reality. But there’s a drug that’s much more common, that’s known for its ability to alter our brains thinking ability the world over, and even Dr Leaf enjoys it.

Like most people, my morning doesn’t really start until after my first cup of coffee. Sure, I’m functional, but barely. Fifteen minutes after the first short black is in my system, I find that I’m much more alert and my thinking is clearer.

What’s changed? Is it my mind changing the function of my brain, or is it the coffee, specifically the caffeine in it, that’s changing my brain which is in turn is making my mind clearer and sharper? I think the answer is obvious. Caffeine is the most commonly used recreational drug in the history of mankind, and every cup of java (real coffee that is, not the travesty that is decaf) is more proof against Dr Leaf’s dogmatic misrepresentation of basic science.

So, if the mind is changed by alterations to the structure and/or function of our physical brain, it follows that our mind must be a function of our brain. Therefore, the mind does not process, while the brain simply hangs on for the ride. Rather, the brain processes, and our mind reflects this processing.

Dr Leaf can tart up her memes all she likes, but until she changes the content of her memes to match some actual science, it’s all just smoke and mirrors. The truth doesn’t need visual pimping. It is simply the truth.

References

[1]        Fumagalli M, Priori A. Functional and clinical neuroanatomy of morality. Brain : a journal of neurology 2012 Jul;135(Pt 7):2006-21.
[2]        Baars BJ. Global workspace theory of consciousness: toward a cognitive neuroscience of human experience. Progress in brain research 2005;150:45-53.
[3]        Guse B, Falkai P, Wobrock T. Cognitive effects of high-frequency repetitive transcranial magnetic stimulation: a systematic review. J Neural Transm 2010 Jan;117(1):105-22.

“Touching the hem of her garment” – A Review of Dr Caroline Leaf at Nexus Church, Brisbane, 2nd August 2015

Posted on August 2, 2015 by cedwardpitt

Dr Caroline Leaf is a communication pathologist and a self-titled cognitive neuroscientist. She’s currently on tour through Queensland and New South Wales in Australia. Her only stop in Brisbane, my home town, was at Nexus, my former home church. Dr Leaf presented a keynote address at Nexus’s annual Designing Women conference yesterday, and was the guest speaker at their two morning services today.

This morning typified Brisbane winter – cloudless azure skies and a refreshingly cool breeze. In contrast to the air temperature, the hospitality at Nexus was warm and friendly. The worship, soulful and uplifting. I really enjoyed being there.

Then it was Dr Leaf’s turn. It’s amazing just how much misinformation one person can fit into a 30 minute sermon.

The main theme for her sermons was an exposition on the parable of the sower, linking the different ways people receive information, with the story of the woman with the issue of blood. Dr Leaf tried to prove that thought and faith are synonymous by linking verses at the beginning and of the story from the gospel of Mark (5:25-34) – “because she thought, ‘If I just touch his clothes, I will be healed.’” (v28) and “He said to her, ‘Daughter, your faith has healed you. Go in peace and be freed from your suffering.’” (v34).

The link is highly tenuous to start with. Faith is an action, whereas thought is not. We assume that action is always preceded by thought, but it is not. Action does not require thought. Many people act without thinking. This is explained in more detail in my discussion on the Cognitive Action Pathways model.

Though to try and make her explanation more plausible, Dr Leaf padded out the story by telling the Nexus crowds that it was only because the woman had spent 12 years in deep intellectual thinking, meditating on the scriptures, that Jesus could heal her. But that’s Dr Leaf’s conjecture. In truth, no one knows exactly what that woman was doing or thinking in the 12 years that preceded her healing. The Bible never says anything else about the woman, in either version of the story in Mark or Luke (8:43-48), other than “She had suffered a great deal under the care of many doctors and had spent all she had, yet instead of getting better she grew worse” (Mark 5:26). If you have to rely on pure speculation to make your sermon work, then that’s story-telling, not preaching.

The other part of her sermon was an attempt to link the parable of the sower to some neuroscience, specifically the role of hippocampal synaptogenesis in the formation of long term memory (or in English, the changes that take place to nerves in the brain when you hear information and try to remember it).

Dr Leaf interpreted the parable as describing four different types of listener – Listener 1, corresponding to the man who hears the word but the devil takes it away, Listener 2, who hears the word and receives it with joy, but it doesn’t take root, Listener 3 who hears the word but it gets choked out by worries, riches or pleasure, and Listener 4 who hears the word and retains it, and the word produces a harvest.

According to Dr Leaf, these types of listener correspond to different levels of nerve branch growth in the formation of long term memory – Listener 1 doesn’t get past 24 hours before the memory dissipates. Listener 2 only lasts about four to seven days but there isn’t enough emotional salience to continue the growth of the nerve branch. Listener 3 doesn’t get past fourteen days, while the 4th Listener makes it through to a full 21 days, Dr Leaf’s magic number for long term memory.

Sounds great … except that the encoding and consolidation of incoming information is much more complex, and doesn’t rely on just new nerve growth [1]. That, and her numbers are completely arbitrary – with some permanent long term memory encoded in a couple of days. In fact, some long-term memory doesn’t need new synaptic growth at all, just a state of high excitation of the nerve network, known as Long-Term Potentiation, which is reliant on a self-reinforcing chemical cascade (if you want more information on the neurobiology of memory, a good place to start is The Brain From Top To Bottom, maintained by McGill University in Canada).

So the bulk of her sermon was based on biblical conjecture and bad science. Dr Leaf also made a myriad of misleading or mistaken statements: we are wired for love not fear, we learn through the quantum zeno effect, every thought effects every one of our 75 trillion cells, your toxic thoughts poison other people in relationship with you because of quantum physics, and many, many others.

I’ve only really got room for a few extra-special mentions.

1. “The mind controls brain”, and “the non-conscious mind is not bound by time and space”

No actual cognitive neuroscientist would be caught dead making those sort of statements. Saying that the mind controls the brain is like saying that air controls your lungs. The mind is a function of the brain, because when the brain is changed in certain ways, structurally or chemically, the mind changes. This has been known about for over a century, at least as far back as Freud who experimented with cocaine and other “mind-altering” substances.

Therefore if the brain controls the mind, then the non-conscious mind must be bound by the physical universe, which includes space and time. To suggest anything otherwise is just science fiction.

Besides, Dr Leaf herself tells us in her book “The Gift In You” [2], that our brain controls our mind. Dr Leaf is simply contradicting her own teaching.

2. “75 to 98% of all physical, mental and emotional illness is caused by your thought life.”

This factoid has been thoroughly debunked. If you would like to read more, you can click here or see chapter 10 in my book [3].

Today, in the second service, Dr Leaf took her fiction a step further and categorically stated that “98% of cancer comes from your thought life”. What nonsense! There is no rational evidence for such a ridiculous statement, and I don’t think there is anything more insensitive to cancer victims and their families than to blame then for causing their own cancer.

3. Mental Health

(a) “Mental illness is worse in the last 50 years than ever before”

To try and prove this is true, Dr Leaf flashed up a slide of ‘horrifying statistics” on mental illness. She claims that,
“35-fold increase in mental illness in children”
“Our children are the first in human history to grow up under the shadow of ‘mental illness'”
“Dramatic increase in the number of mentally ill since 50’s … things are worse not better”
“Mental ill health worst its ever been in history of mankind”

Every one of these statements is patently false. Mental illness has been with humankind for ever. The ancient Egyptians were writing about hysteria in women some two thousand years before Christ [4]. It’s only been in the last century or so that mental illnesses have become seen for the biological entities that they are, and not some form of demon possession, criminal behaviour or sexual deviancy.

Dr Leaf was quick to malign the DSM (the Diagnostic and Statistical Manual of psychiatry), suggesting that it’s unscientific. The DSM isn’t perfect, true, but before the DSM, there was even less science to the diagnosis of mental illness. As Dr Leaf herself pointed out, mental illness was previously viewed philosophically or spiritually. There was no consistency in diagnosis and no collection of statistics.

The DSM, for all its faults, gave a framework for mental health diagnosis, but as the science has become more refined, and with increasing awareness and general acceptance of mental health conditions, more people have qualified and/or accepted a diagnosis.

Mental illness has always been there, but now we know what to look for, it’s no longer hidden or ignored.

(b) “Psychotropic medications cause damage to the brain”

While on the subject of mental health, Dr Leaf made the litigation-attracting statement that psychotropic medications (anti-depressants, anti-psychotics) cause damage to the brain. That’s a particularly bold statement to make without citations, or a medical degree, to back it up.

Rather than ‘causing’ damage to the brain, there is scientific evidence that psychotropic medications increase synaptogenesis (the growth of new nerve branches) [5-7], while the NICE guidelines in the UK reviewed the evidence for anti-depressants and found them to be an effective treatment for depression [8], not harmful as Dr Leaf suggests.

Dr Leaf also made the preposterous claim that biological causes of psychiatric illness have never been proven, but again, changes to brain structure have been associated with psychiatric symptoms ever since a 13-pound, three-and-a-half foot iron rod went through Phineas Gage’s skull and frontal lobe in 1848, and his personality suddenly changed from pleasant and congenial to depressed and angry [9]. Personality changes represent early symptoms of brain tumours. Use of drugs such as crystal meth can cause paranoia and extreme aggression. You don’t even need to be a doctor to know that, you just need to watch ‘Breaking Bad‘. So examples of the biological basis of psychiatric symptoms are everywhere. There are no grounds for Dr Leaf’s assertion.

4. Toxic thinking causes dementia

Dr Leaf claimed at the end of both sermons that toxic thinking results in the tubular backbone of the new nerve branches becoming contorted, which caused the accumulation of the tau protein in the nerve cells, which was responsible for dementia of every type. This, too, is a fallacy. The accumulation of the tau protein is found only in Alzheimers, not in Lewy Body dementia or in vascular dementia. The abnormal tau protein is likely related to the loss of a intracellular clean-up enzyme system [10], but Alzheimers is more complicated than just tau protein deposition, and has nothing to do with toxic thinking.

At the conclusion of the second service, I was outside the church when Dr Leaf and her entourage left the church auditorium before the rest of the crowd did, and I approached them to shake her hand and introduce myself. It was the mature thing to do after all. When I was about two metres from her presidential detail, a woman stepped out in front of me, blocking my way.

“You can’t follow them,” she said. “They’re going inside” (ie: hiding in the green room).
“Really?” I said, somewhat caught off guard. “I was simply going to introduce myself.”
“No”, was the firm reply. “You’re not allowed.”

By that time, the presidential detail had disappeared into their fortified sanctuary. The woman with the issue of blood may have got to Jesus, but there was no way I was even getting close to Dr Leaf.

This was a common pattern … Dr Leaf made herself deliberately scarce before and after each service, only coming into the church when the service was well underway, and leaving as soon as she preached, under heavy guard. One has to ask why? What’s she got to be afraid of? Is she so insecure about her teaching that she couldn’t possibly risk speaking to someone and being exposed as intellectually brittle? Or is it that she’s so arrogant as to insist on avoiding the rank-and-file church goer?

The pattern of avoidance of anyone other than her devotees, and her tendency to block anyone who disagrees with her from her social media accounts, would strongly suggest the former, although since she is so insistent on hiding from regular people, it’s really anyone’s guess.

Not that it matters. Dr Leaf could be the nicest person in the world. Her ministry doesn’t rest on her sociability, but its own Biblical and scientific merits, and on that alone, it has been found seriously wanting.

References

[1]        Citri A, Malenka RC. Synaptic plasticity: multiple forms, functions, and mechanisms. Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology 2008 Jan;33(1):18-41.
[2]        Leaf CM. The gift in you – discover new life through gifts hidden in your mind. Texas, USA: Inprov, Inc, 2009.
[3]        Pitt CE. Hold That Thought: Reappraising the work of Dr Caroline Leaf. 1st ed. Brisbane, Australia: Pitt Medical Trust, 2014.
[4]        Tasca C, Rapetti M, Carta MG, Fadda B. Women and hysteria in the history of mental health. Clinical practice and epidemiology in mental health : CP & EMH 2012;8:110-9.
[5]        Karatsoreos IN, McEwen BS. Resilience and vulnerability: a neurobiological perspective. F1000prime reports 2013;5:13.
[6]        Duric V, Duman RS. Depression and treatment response: dynamic interplay of signaling pathways and altered neural processes. Cellular and molecular life sciences : CMLS 2013 Jan;70(1):39-53.
[7]        Karatsoreos IN, McEwen BS. Psychobiological allostasis: resistance, resilience and vulnerability. Trends in cognitive sciences 2011 Dec;15(12):576-84.
[8]        Anderson I. Depression. The Treatment and Management of Depression in Adults (Update). NICE clinical guideline 90.2009. London: The British Psychological Society and The Royal College of Psychiatrists, 2010.
[9]        Kihlstrom JF. Social neuroscience: The footprints of Phineas Gage. Social Cognition 2010;28:757-82.
[10]      Tai HC, Serrano-Pozo A, Hashimoto T, Frosch MP, Spires-Jones TL, Hyman BT. The synaptic accumulation of hyperphosphorylated tau oligomers in Alzheimer disease is associated with dysfunction of the ubiquitin-proteasome system. The American journal of pathology 2012 Oct;181(4):1426-35.

Dr Caroline Leaf – Still Contradicted by the Latest Evidence, Scripture and Herself

Posted on July 22, 2015 by cedwardpitt

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Dr Caroline Leaf is a communication pathologist, world renowned author, public speaker, and self-titled cognitive neuroscientist. Her influence continues to grow. She is regularly invited to speak at some of the world’s largest churches. She spoke at her first TEDx conference in February, and she’s about to host her own conference for the second time. She has more than 120,000 Facebook followers, with many more on Twitter and other social media platforms. And she continues to top the sales charts of Christian best sellers.

She is a self-marketing machine.

But there are cracks appearing. More and more, people are realizing that beneath the facade of her numerous Instagram posts, happy snaps, and the allure of popular success, Dr Leafs teachings on science and the Bible don’t match up with actual science and good theology. While many in the church adorn themselves with her teaching, a growing minority are starting to realise that the Emperor has no clothes.

Almost two years ago to the day, I sat in the congregation of Kings Christian Church on the Gold Coast, and heard Dr Leaf speak live for the first time. What I heard troubled me, and I blogged about my concerns to open a dialogue on Dr Leaf and her teaching. Her husband, Mr Mac Leaf, dismissed my concerns out of hand, which only steeled me to take further action. Now, two years of intense research, dozens of posts and a book later, people are starting to take notice.

Not that Dr Leaf has changed her tune. Her fundamental teaching still relies on the idea that our thoughts control our physical and mental health, and toxic thinking causes disease because our thoughts change our DNA and the expression of our genes through epigenetics. And, if we ‘detox’ our thoughts, we will be restored to the health that God intended. Dr Leaf is also expanding her ministry to the subject of mental health and she plans to release a book on food in early 2016.

Dr Leaf can spruik whatever she likes, but her claims of expertise and her scientific and scriptural legitimacy are crumbling.

This post is a little longer than usual, but I’ve divided it up for easier reading:

Dr Leaf is contradicted by her own qualifications
Dr Leaf is contradicted by science
Dr Leaf is contradicted by scripture
Dr Leaf is contradicted by Dr Leaf

1. Dr Leaf is contradicted by her own qualifications

In her books, on TV, at churches, and in promotional material, Dr Leaf describes herself as a ‘cognitive neuroscientist’.

However, Dr Leaf does not have formal qualifications in neuroscience, has not worked at a university as a neuroscientist, has not worked in any neuroscience research labs, nor has she published any papers in neuroscience journals.

Actually, Dr Leaf is trained as a communication pathologist. A communication pathologist is an allied health professional which seems to be unique to South Africa where Dr Leaf trained. It’s a synthesis of audiology and speech pathology. It qualified her to work as a therapist, which Dr Leaf did for children with traumatic brain injuries. Dr Leaf also researched a narrow band of educational psychology as part of her PhD, and she also worked in a number of schools and for educational boards in South Africa. Dr Leaf hasn’t performed any university based research since her PhD was published in 1997.

In contrast, true cognitive neuroscientists actively carry out research into the biological basis of thoughts and behaviours – either mapping behaviours to certain brain regions using electrical currents from the brain, or with functional brain imaging like fMRI, or stimulating or suppressing the activity of a region of the brain and seeing how a person responds.

Simply having some training in neuroanatomy and psychology doesn’t make you a cognitive neuroscientist. Completing a PhD that involved a model for learning doesn’t make you a cognitive neuroscientist. Reading a lot of books on neuroscience doesn’t make you a neuroscientist either, just like reading the Bible doesn’t automatically make you a Pastor.

So no matter how much Dr Leaf may try to convince us that she’s an expert cognitive neuroscientist, truth be told, she is not.

Of more concern is that Dr Leaf is also trying to position herself as an expert in the fields of mental health and nutrition. But if she can’t get her facts right in an area in which she’s had some training, then it’s unlikely Dr Leaf’s teaching will be reliable in areas that she’s had no formal training or experience whatsoever.

I might add, Dr Leaf’s insistence that she’s a cognitive neuroscientist and an expert on mental health and nutrition is also quite insulting for real psychologists, neuroscientists and nutritionists whose opinions are ignored in favour of a self-titled expert whose only ‘authority’ comes by popular demand, not training or experience.

2. Dr Leaf is contradicted by science

There are so many examples of Dr Leaf being directly contradicted by the science that she claims expertise in that I don’t have room in this blog to outline them all. What I can do in this limited space is to outline Dr Leaf’s most egregious and ironic fallacies as a taster.

The 98 percent

One of Dr Leaf’s most fundamental assertions is that “75 to 98 percent of mental and physical illness comes from ones thought life” [1]. She uses this little factoid all the time to justify her belief in the power of thoughts.

However, her statement is completely wrong. When considered in the historical and global context [2], most of human illness is related to preventable diseases that are so rare in the modern western world because of generations of high quality public health and medical care.

For example, Hunter et al state that, “diarrhoeal disease is the second most common contributor to the disease burden in developing countries (as measured by disability-adjusted life years (DALYs)), and poor-quality drinking water is an important risk factor for diarrhoea.” [3]

De Cock et al write, “Recent estimates of the global incidence of disease suggest that communicable diseases account for approximately 19% of global deaths” and that “2.5 million deaths of children annually (are) from vaccine-preventable diseases.” [4]

Routine screening with the much-maligned pap smear has decreased the death rate from cervical cancer in women by as much as 83% [5]. And having a competent midwife and obstetric support during childbirth can decrease the odds of dying in childbirth from 1 in 6 to less than 1 in 30,000 [6].

Midwives, vaccinations, pap smears, clean drinking water and internal plumbing have nothing to do with our individual thought life. We take all of this for granted in the first-world, so the impact of our thought life becomes artificially inflated. In reality, modern medicine and civil engineering, not our thought life, have everything to do with our good health..

Though what makes this meme such a good example of the weakness of Dr Leaf’s teaching is not just because it’s contradicted by actual science, but in trying to justify her conjecture, Dr Leaf has resorted to twisting, misquoting, and generally fudging information from her ‘sources’ in order to make them support her false conclusions.

For example, Dr Leaf quoted a source on genetics that was over thirty years old, from a time when genetic studies were still in the dark ages. She also misquotes her sources, significantly changing the meaning of the quotes in the process. One source didn’t even mention the figure she attributed to it. As if that’s not bad enough, Dr Leaf also cites biased sources, pseudoscientists, and other sources that directly contradict her assertion [7; Ch 10].

This pattern of relying on mistruths and factoids to paper over the gaping cracks in her irrational assertions is repeated throughout her teaching.

The heart is a mini-brain

Dr Leaf believes that the human heart acts as a mini-brain. She states that the heart has its own thought functions, is an electrophysiological regulator of every cell in the body, and is the source of the human conscience.

Such an assertion is ludicrous, and science proves it to be so – the “still small voice” comes from our brains [8-10], and everyday office-based medical tests prove that the electromagnetic signal from the heart is too small to have any meaningful influence on our body’s cells, let alone our thinking [7: Ch 11].

You control your DNA with your thoughts

Dr Leaf believes that our thinking can influence our DNA. She said this in her 2013 book [1: p35], and several times on her social media streams. The problem for Dr Leaf is that there is no credible scientific evidence that DNA is controlled by thoughts.

Her main evidence comes from a poster presentation at a 1993 psychotronics conference titled, “Local and nonlocal effects of coherent heart frequencies on conformational changes of DNA” [11]. She describes this paper as, “An ingenuous experiment set up by the HeartMath Foundation (which) determined that genuine positive emotion, as reflected by a measure called ‘heart rate variability’, directed with intentionality towards someone actually changed the way the double helix DNA strand coils and uncoils. And this goes for both positive and negative emotions and intentions.” [1: p111]

Actually, the experiment was based on faulty assumptions, and so full of flaws in the methodology and analysis, that it could show nothing at all [7: Ch 13]. All it could prove was that Dr Leaf was so desperate to grasp hold of anything that seemed to support her theory that she was willing to use a twenty-year-old study from a group of pseudoscientists that also believe in occult practices like ESP and telekinesis (http://psychotronics.org).

On and on, the same pattern continues. She claims that our thoughts are powerful enough to control our DNA and our brain, except that the opposite is true – it’s our DNA code, with some influence from our environment, that creates our pattern of neurons responsible for our stream of thoughts. She teaches that thoughts cause stress, when again, the evidence is the opposite – psychological stress starts as a subconscious process which changes our stream of thoughts. Dr Leaf teaches that in order to improve our mental and physical health, we need to fight any ‘negative’ or ‘toxic’ thoughts, when studies show that cognitive therapy isn’t effective when compared to behavioural activation. (This is explained in more detail, and with the appropriate references, in my book [7]).

Dr Leaf even goes so far as to say that our thoughts can control physical matter! [1: p33,38]

Over and over again, Dr Leaf’s teaching conflicts with modern science. That Dr Leaf also regularly misquotes her sources and relies on unpublished opinion from pseudoscientists and new-age practitioners also brings her reputation as an expert scientist into disrepute.

3. Dr Leaf is contradicted by scripture

In her books and on social media, Dr Leaf often quotes scripture in an attempt to reinforce her reputation as some form of Biblical expert. Everything’s fine when she simply quotes scripture, but problems arise when she tries to interpret it. Like her use of science, Dr Leaf often misquotes or paraphrases scripture, or uses it out of context, in order to try and Biblically justify her tenuous hypotheses.

2 Timothy 1:7

One of Dr Leaf’s favourites is 2 Timothy 1:7: “For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind.” Dr Leaf interprets the phrases of “spirit of fear” and “a sound mind” as “anxiety” and “mental wholeness” respectively. For example, on the 12th of May 2014, she posted to her social media feeds, “Your mind is all-powerful. Your brain simply captures what your mind dictates. 2 Timothy 1:7” And in her book “Switch on your brain” [1], she said on page 33, “For now, rest in the assurance that what God has empowered you to do with your mind is more powerful and effective than any medication, any threat, any sickness, or any neurological challenge. The scripture is clear on this: You do not have a spirit of fear but of love, power and a sound mind (2 Tim 1:7).”

Simply checking the verse in its full context, and in a different translation, shows it in a completely different light to the way Dr Leaf promotes it. From the NIV, “I am reminded of your sincere faith, which first lived in your grandmother Lois and in your mother Eunice and, I am persuaded, now lives in you also. For this reason I remind you to fan into flame the gift of God, which is in you through the laying on of my hands. For the Spirit God gave us does not make us timid, but gives us power, love and self-discipline. So do not be ashamed of the testimony about our Lord or of me his prisoner. Rather, join with me in suffering for the gospel, by the power of God.” (2 Timothy 1:5-8)

The Greek word for “fear” in this scripture refers to “timidity, fearfulness, cowardice”, not to anxiety or terror. The Greek word that was translated “of a sound mind” refers to “self-control, moderation”, not to mental wholeness. So Paul is teaching Timothy that God doesn’t make him timid, but full of power, love and self-control. Paul is simply saying that through the Holy Spirit, we have all the tools: power, love and the control to use them, so we don’t have to be afraid.

This scripture has nothing to do with our mental health. It certainly doesn’t say that our minds are “more powerful and effective than any medication, any threat, any sickness, or any neurological challenge”. Dr Leaf’s use of this scripture is misleading.

Proverbs 23:7

Another favourite of Dr Leaf’s is Proverbs 23:7, “For as he thinketh in his heart, so is he”.

She used this scripture a number of times on her social media feeds, including on the 4/2/2015, “‘The more you believe in your own ability to succeed, the more likely it is that you will. Shawn Achor’ – ‘For as he thinketh in his heart, so is he …’ Proverbs 23:7”, and the 29/5/2015, “Mind In Action: ‘Genes cannot turn themselves on or off. In more scientific terms, genes are not ‘self-emergent’. Something in the environment has to trigger gene activity.’ Dr Bruce Lipton’ – That ‘something’ is your thoughts! Read Proverbs 23:7”. Dr Leaf also used the same scripture to try and explain how the woman with the issue of blood managed to obtain her healing [1: p111].

What’s interesting is how Dr Leaf only ever uses the first half of this verse. The whole verse (in the King James Version) reads, “For as he thinketh in his heart, so is he: Eat and drink, saith he to thee; but his heart is not with thee.”

So what’s with the second half of the verse? What’s the eating and drinking half of the verse got to do with our thought life?

The explanation is that this verse has nothing to do with our thought life at all. Dr Leaf has simply been misquoting it for years, and no one checked to see if she’s right. According to the Pulpit commentary found on the Bible Hub website, “The verb here used is שָׁעַר (shaar), ‘to estimate … to calculate’, and the clause is best rendered, ‘For as one that calculates with himself, so is he’. The meaning is that this niggardly host watches every morsel which his guest eats, and grudges what he appears to offer so liberally … He professes to make you welcome, and with seeming cordiality invites you to partake of the food upon his table. But his heart is not with thee. He is not glad to see you enjoy yourself, and his pressing invitation is empty verbiage with no heart in it.” (http://goo.gl/nvSYUh)

Thus, the scripture does not prove that our thoughts define us as Dr Leaf would suggest. Dr Leaf’s use of this scripture is misleading.

James 1:21

Another example, on the 26 May 2014 on her social media feeds, Dr Leaf said, “James 1:21 How you react to events and circumstances of your life is based upon your perceptions” and then a week later, “James 1:21 Our thoughts and perceptions have a direct and overwhelmingly significant effect of the cells of our body” (4/6/2014).

Except that James 1:21 actually says, “Wherefore lay apart all filthiness and superfluity of naughtiness, and receive with meekness the engrafted word, which is able to save your souls”, and has absolutely nothing to do with our perceptions and our cellular biology.

The same pattern is repeated on social media and in her books. Dr Leaf finds scriptures where one version mentions words like “thinking” or “choice”, isolates them from their context and reinterprets them to suit her meaning, rather the actual meaning of the verse in the original language and the original context.

4. Dr Leaf is contradicted by Dr Leaf

Not only is Dr Leaf’s teaching contrary to science and scripture, but even her own teaching contradicts itself. Dr Leaf also makes claims about her research and achievements that aren’t backed up by her published papers.

To gift or not to gift …

In her 2009 book, “The gift in you” [12], Dr Leaf teaches about the gifts that we have, specifically, our gifts are something uniquely hardwired into our brain, something that we cannot change even if we wanted to, and that it’s our brain structure that gives rise to the way in which we think, the actions that we take, and the gifts we are given from God.

On page 47, Dr Leaf said,

“The mind is what the brain does, and we see the uniqueness of each mind through our gifts. This, in itself is delightful and, intriguing because, as you work out your gift and find out who you are, you will be developing your soul and spirit.” (Emphasis added)

This quote in and of itself isn’t actually that significant until we compare it to a quote from the first chapter of Dr Leaf’s 2013 book, “Switch on your brain.” [1]

“The first argument proposes that thoughts come from your brain as though your brain is generating all aspects of your mental experience. People who hold this view are called materialists. They believe that it is the chemicals and neurons that create the mind and that relationships between your thoughts and what you do can just be ignored.
So essentially, their perspective is that the brain creates what you are doing and what you are thinking. The mind is what the brain does, they believe, and the ramifications are significant. Take for example, the treatment of depression. In this reductionist view, depression is a chemical imbalance problem of a machinelike brain; therefore, the treatment is to add in the missing chemicals.
This view is biblically and scientifically incorrect.” [1: p31-32] (Emphasis added)

So … our gifts are hardwired into our brain and can’t be changed because our mind is what our brain does OR our brain is what our mind does, so our gifts aren’t uniquely hardwired into our brain, and we should be able to change our gifting if we want to, based on our choices. Which is it? It can’t be both. Dr Leaf’s fundamental philosophies are mutually exclusive.

Now, we all make innocent mistakes. No one is perfectly congruent in everything they say. But this isn’t just getting some minor facts wrong. These statements form the foundation for Dr Leaf’s major works, and are in print in two best selling books, from which she has used to present countless sermons and seminars around the globe.

To summarise, Dr Leaf has directly called her own beliefs and teaching “biblically and scientifically incorrect”, and not noticed. The confusion and embarrassment are palpable.

But wait, there’s more.

(Not) Making a Difference

From the pulpit, in her books, and in her promotional material, Dr Leaf refers to her ground-breaking research – how her “Switch On Your Brain 5 Step Learning Process” and the Geodesic Information Processing model (which underpins her program), have helped thousands of children to increase their learning and improve their academic results.

For example, Dr Leaf claims that, “The Switch On Your Brain with the 5-Step Learning Process® was assessed in a group of charter schools in the Dallas [sic]. The results showed that the students’ thinking, understanding and knowledge improved across the board. It was concluded that The Switch On Your Brain with the 5-Step Learning Process® positively changed the way the students and teachers thought and approached learning.” (http://drleaf.com/about/dr-leafs-research/ – Original emphasis)

In her TEDx talk, Dr Leaf stated, “I wasn’t sure if this was going to have the same impact cause until this point I’d been working one on one. Well I’m happy to tell you that we had the same kind of results … The minute that the teachers actually started applying the techniques, we altered the trend significantly.” and,
“I stand up here saying this with conviction because I have seen this over and over and over in so many different circumstances … in this country I worked in Dallas for three years in charter schools, and we found the same thing happening.” [13]

Though there is the minor problem of her research results not demonstrating any actual change.

In Dr Leaf’s first case, Dr Leaf herself admitted that the demonstrated improvement of her single patient was just as likely to be related to spontaneous improvement, and not Dr Leaf’s intervention. In Dr Leaf’s PhD thesis, the students improved almost as much in the year without Dr Leafs intervention as they did with her program. In the Dallas charter schools study, Dr Leaf’s intervention either disadvantaged the students or showed no significant difference. In academic circles, Dr Leaf’s research hasn’t so much as generated a stale whimper [14].

So while Dr Leaf may claim that her research has changed the learning and lives of thousands of students all over the world, but her own published research disputes her claims.

The Emperor has no clothes, but no one wants to say anything

In Hans Christian Andersen’s legendary tale, the Emperor was conned by two swindlers into believing that “they were weavers, and they said they could weave the most magnificent fabrics imaginable. Not only were their colors and patterns uncommonly fine, but clothes made of this cloth had a wonderful way of becoming invisible to anyone who was unfit for his office, or who was unusually stupid.”

If you don’t know the story, you can read it here. In the end, the Emperor was duped so badly that he paraded in front of all his subjects au naturel, but “Nobody would confess that he couldn’t see anything, for that would prove him either unfit for his position, or a fool. No costume the Emperor had worn before was ever such a complete success.”

My analogy here is not to suggest that Dr Leaf is deliberately conning the church. Rather, our natural instinct is to suppress our own judgement, even when it’s right, in favour of everyone else’s. We assume information to be true because others in authority tell us it is. We assume that the Emperor must be wearing something because the trusted ministers and noblemen are holding his imaginary train high in the air.

Likewise, it’s very natural for Christians to believe that Dr Leaf’s teaching must be ok because our pastors and leaders vouch for it. Our pastors and leaders vouch for Dr Leaf’s teaching because it’s been endorsed by world-renowned Christian leaders like Kenneth Copeland and Joyce Meyer. And no one wants to say anything, because they don’t want to look sheepish (or be ostracised). Dr Leaf’s ministry may look like a complete success, but only until someone finally says, “But, the Emperor has no clothes …”

It’s time to call Dr Leaf’s ministry for what it is. In my humble opinion, I suggest that Dr Leaf’s ministry is not based on scientific acumen, but on popularity and reputation. And her reputation, in turn, is based on slick self-promotion and an availability cascade (a self-reinforcing process by which an idea gains plausibility through repetition).

Dr Leaf’s teachings are not supported by science, nor by scripture. Her own fundamental philosophies contradict each other. Her assertions about her title and the results of her work are in conflict with her own official data.

Our church leaders need to come clean about why they publicly endorse Dr Leaf’s ministry. I can justify why I think Dr Leaf should not be preaching from our pulpits – in this and many other blog posts, and in my 68,000 word rebuttal to Dr Leaf’s published works. Can Kenneth Copeland and Joyce Meyer, or churches such as Cottonwood Church or Hillsong Church, produce evidence where they performed due diligence on Dr Leaf’s scientific credibility before endorsing her ministry? I would be happy to publish any responses they may be willing to make, complete and unabridged.

If Dr Leaf is preaching at your church, politely ask your pastor to produce his or her evidence that Dr Leaf’s teaching is scientifically and scripturally sound. If your church leaders can’t show that Dr Leaf’s teachings are scientifically and scripturally accurate, then politely ask them why she’s been invited to preach from their pulpit or to sell her wares in your church? Feel free to share your experiences in the comments section.

Critics and sceptics love to use any opportunity they can to embarrass the church, but by parading our own naivety, we’re simply embarrassing ourselves.

It’s time we dressed ourselves in God’s glory, not our own ignorance and ignominy.

References

[1]        Leaf CM. Switch On Your Brain : The Key to Peak Happiness, Thinking, and Health. Grand Rapids, Michigan: Baker Books, 2013.
[2]        World Health Organization. GLOBAL HEALTH ESTIMATES SUMMARY TABLES: DALYs by cause, age and sex. In: GHE_DALY_Global_2000_2011.xls, editor. Geneva, Switzerland: World Health Organization,, 2013.
[3]        Hunter PR, MacDonald AM, Carter RC. Water supply and health. PLoS medicine 2010;7(11):e1000361.
[4]        De Cock KM, Simone PM, Davison V, Slutsker L. The new global health. Emerging infectious diseases 2013 Aug;19(8):1192-7.
[5]        Dickinson JA, Stankiewicz A, Popadiuk C, Pogany L, Onysko J, Miller AB. Reduced cervical cancer incidence and mortality in Canada: national data from 1932 to 2006. BMC public health 2012;12:992.
[6]        Ronsmans C, Graham WJ, Lancet Maternal Survival Series steering g. Maternal mortality: who, when, where, and why. Lancet 2006 Sep 30;368(9542):1189-200.
[7]        Pitt CE. Hold That Thought: Reappraising the work of Dr Caroline Leaf. 1st ed. Brisbane, Australia: Pitt Medical Trust, 2014.
[8]        Mendez MF. The neurobiology of moral behavior: review and neuropsychiatric implications. CNS spectrums 2009 Nov;14(11):608-20.
[9]        Zysset S, Huber O, Ferstl E, von Cramon DY. The anterior frontomedian cortex and evaluative judgment: an fMRI study. NeuroImage 2002 Apr;15(4):983-91.
[10]      Glascher J, Adolphs R, Damasio H, et al. Lesion mapping of cognitive control and value-based decision making in the prefrontal cortex. Proceedings of the National Academy of Sciences of the United States of America 2012 Sep 4;109(36):14681-6.
[11]      Rein G, McCraty R. Local and nonlocal effects of coherent heart frequencies on conformational changes of DNA. Proc Joint USPA/IAPR Psychotronics Conf, Milwaukee, WI; 1993; 1993.
[12]      Leaf CM. The gift in you – discover new life through gifts hidden in your mind. Texas, USA: Inprov, Inc, 2009.
[13]      Leaf CM. Ridiculous | TEDx Oaks Christian School | 4 Feb 2015. YouTube: TEDx, 2015;20:03.
[14]      Pitt CE, The TEDx Users Guide to Dr Caroline Leaf, cedwardpittcom; 2015   Mar 26, https://cedwardpitt.com/2015/03/26/the-tedx-users-guide-to-dr-caroline-leaf/

Dr Caroline Leaf and the tongues trivia tall tales trifecta

Posted on June 7, 2015 by cedwardpitt

I saw a Facebook factoid from Caroline Leaf today that said, “When we speak in tongues, research shows that the areas involved in discernment in the brain increase in activity, which means we increase in wisdom.”

Dr Caroline Leaf is a communication pathologist and a self-titled cognitive neuroscientist. She has also proclaimed herself as an expert on science and the Bible.

In the opening of her “Scientific Philosophy”, for example, Dr Leaf says that, “God is the Creator of the Universe and is the Author of Science. Since God is the Author of the Bible, the Bible is therefore the ultimate authority in any scientific matters. The study of Science is therefore the study of God’s handiwork and is a way of admiring His Creation. God, the Creator, is the One to be worshipped, not the Creation. The Creation, however, reflects the Glory of God and points to His Divine attributes.”

In order to prove that the Bible is the ultimate scientific authority, Dr Leaf attempts to find scientific studies which support Biblical concepts. One example of this is her teaching on Glossolalia, the scientific term for the Biblical concept ‘speaking in tongues’.

Dr Leaf’s Facebook factoid on the neuroscience of speaking in tongues is at least the second time she has posted it. In November when I first saw Dr Leaf’s proclamation on the science of speaking in tongues, I was fascinated. I went to find the research for myself to see if the areas involved in discernment in the brain really increase in activity when speaking in tongues. As it turns out, there isn’t any.

The only study that I could find about brain functioning during speaking in tongues was by Newberg [1]. As I wrote in my previous blog, the study by Newberg showed the part of the brain that’s involved in both speaking in tongues and discernment, the ventromedial prefrontal cortex, decreases in activity when praying in tongues, not increases, in direct contradiction to Dr Leaf’s meme.

In November, I concluded, “there are really only two reasonable explanations as to why the research contradicts Dr Leaf; either there is another piece of research which supports Dr Leaf’s assertion, or Dr Leaf is simply wrong.”

Today on Facebook, Dr Leaf demonstrated that she can not be swayed from her entrenched idea that speaking in tongues increases discernment … or can she? Her meme and her discussion on glossolalia in her ‘Scientific Philosophy’ seem contradictory.

For example, she writes in her scientific philosophy manifesto, “In 2006 Dr. Andrew Newberg at the University of Pennsylvania, using single-photon emission computerized tomography (SPECT), found that the frontal lobe of individuals who spoke in tongues was less active. This brain profile was in contrast to Franciscan nuns in contemplative prayer and Buddhist monks in meditation, in which frontal lobe activity is increased. Since the frontal lobe activity is increased when we are focused on what we are saying, this finding confirms self-reports of what people who spoke in tongues experienced, implying that the words spoken in glossolalia originate from a source other than the mind of the individual speaking in tongues.”

In this paragraph, Dr Leaf confirms that frontal lobe activity decreases when speaking in tongues, in keeping with her anecdotal evidence of “self-reports of what people who spoke in tongues experienced, implying that the words spoken in glossolalia originate from a source other than the mind of the individual speaking in tongues.” But this is in direct contrast with her social media meme, which suggests that speaking in tongues increases frontal lobe activity – the area of the brain common to glossolalia and discernment is the vmPFC, which decreases with glossolalia and increases with discernment.

Dr Leaf is a confusing enigma. She posts social media memes that are clearly wrong, even disagreeing with the scientific papers she has written about and her own conclusions in her own manifesto.

This only discounts her legitimacy. You can’t continue to contradict your own evidence. It’s like shooting yourself in the foot, or digging your own grave. What’s worse, Dr Leaf teaches this from real pulpits, not just on social media. How is her audience supposed to feel when they hear what she has to say and find it disagrees with her own scientific philosophy?

I sound like a broken record, but Dr Leaf desperately needs to review her teaching and social media memes. It’s bad enough to be contradicted by scientific evidence, but to be in disagreement with your own teaching is embarrassing, and does nothing to preserve trust with your audience.

References

[1] Newberg AB, Wintering NA, Morgan D, Waldman MR. The measurement of regional cerebral blood flow during glossolalia: a preliminary SPECT study. Psychiatry research 2006 Nov 22;148(1):67-71.

Dr Caroline Leaf – Manhandling scriptures again

Posted on May 30, 2015 by cedwardpitt

I recently heard a great quote, “If you take the text out of context, all you’re left with is a con.” It’s a quote that seems to describe Dr Leaf’s social media pings quite nicely over the last twenty-four hours.

Dr Caroline Leaf is a communication pathologist and a self-titled cognitive neuroscientist. She is also a self-titled theologian.

Today she posted, “3 John 2 = Mental Health ‘Beloved, I wish above all things that thou may prosper and be in health, even as your soul prospers.’ Everything relies on your soul, which is your mind, prospering” (original emphasis).

Except that her statement is blatantly false. The soul isn’t just the mind. A simple search of an on-line Bible dictionary reveals that there are a number of ways in which the word ‘soul’ is used, but more specifically to the meaning in 3 John 2, “the (human) soul in so far as it is constituted that by the right use of the aids offered it by God it can attain its highest end and secure eternal blessedness, the soul regarded as a moral being designed for everlasting life”. (http://goo.gl/AjhvNO)

It should also be noted that the two words used in ancient Greek that referred to our inner reality were pneuma (‘spirit’) and psyche (‘soul’). According to Thayer’s Greek Lexicon, the words pneuma (‘spirit’) and psyche (‘soul’) were often used indiscriminately. The Apostle Paul distinctly used the word pneuma separately to the word psyche in 1 Thessalonians 5:23, but nearly every other New Testament writer wasn’t so precise.

Thus, John wasn’t referring to the mind at all, but probably our spirit, or at the very least, our generic soul, not specifically to our mental faculties or our thoughts. The scripture in 3 John 2 doesn’t have anything to do with our mental health.

Yesterday, Dr Leaf tried to merge one of her favourite authors views with scripture. She posted a quote from Dr Bruce Lipton, “Genes cannot turn themselves on or off. In more scientific terms, genes are not ‘self-emergent’. Something in the environment has to trigger gene activity.” Dr Leaf added, “That ‘something’ is your thoughts! Read Proverbs 23:7”.

So I did. Proverbs 23:7 in the King James Version says, “For as he thinketh in his heart, so is he: Eat and drink, saith he to thee; but his heart is not with thee.”

So what is it with the second half of the verse? If this scripture is all about our thought life, then what’s the eating and drinking half of the verse got to do with our thought life?

The explanation is that this verse has nothing to do with our thought life at all. Dr Leaf has simply been misquoting it for years, and no one checked to see if she’s right. According to the Pulpit commentary found on the Bible Hub website, “The verb here used is שָׁעַר (shaar), ‘to estimate … to calculate’, and the clause is best rendered, ‘For as one that calculates with himself, so is he’. The meaning is that this niggardly host watches every morsel which his guest eats, and grudges what he appears to offer so liberally … He professes to make you welcome, and with seeming cordiality invites you to partake of the food upon his table. But his heart is not with thee. He is not glad to see you enjoy yourself, and his pressing invitation is empty verbiage with no heart in it.” (http://goo.gl/nvSYUh)

The other half of her meme comes from Dr Bruce Lipton, an agnostic pseudoscientist who was a cell biologist before he flamed out, and now teaches chiropractic in New Zealand. He believes that there is a metaphysical link between our thoughts and our cell function [1]. He’s ignored by real scientists (http://goo.gl/cX7Aeg).

As for his quote, it’s a misdirection. Sure, genes aren’t self-emergent – they don’t think for themselves. DNA is just a long chemical string which just carries a code, the biological equivalent to your DVD discs. Like a DVD, DNA isn’t worth anything if it doesn’t have a machine to read it. In every cell, there are hundreds of proteins that read and translate DNA. Those machines respond to the external environment, but they also respond to the cells internal environment, and to other genes themselves. Simply put, DNA is decoded by intracellular proteins, but intracellular proteins are only made by the expression of DNA, which happens all the time. A single-celled embryo becomes a baby because of DNA self-copying and expression that happens a trillion times over by the end of pregnancy. So while a single gene can’t turn itself on and off, the genome as a whole is essentially self-controlling, only being partly modulated by the external environment. Genes are turned on and off all the time by other genes through the proteins those genes make. Lipton’s assertion that “something in the environment has to trigger gene activity” is simply nonsense.

So Dr Leaf uses a flawed quote from a pseudoscientist to try and back up her specious interpretation of an out-of-context verse of scripture.

Somewhat poor from an “expert” theologian and cognitive neuroscientist really.

These memes speak to the issues of trust and legitimacy. Dr Leaf can call herself whatever she likes, but how can church leaders continue to endorse her to their congregations as an expert when she consistently misinterprets science and scripture? Can they honestly look their parishioners in the eye and say that Dr Leaf’s teaching is accurate? Can they stand at their pulpits and confidently support her book sales at their back of their churches?

Dr Leaf needs to re-evaluate. She needs to re-evaluate her claims to be an expert in cognitive neuroscience and the Bible. She needs to re-evaluate the quality of information that she relies on. She needs to re-evaluate what she’s trying to achieve in posting to social media, and re-evaluate the accuracy of her memes.

Because ultimately it’s the truth that sets people free, not errant opinions and misinterpretations.

References

[1] Lipton BH. The biology of belief: Unleashing the power of consciousness, matter and miracles: Hay House, Inc, 2008.

Addit: Dr Leaf’s social media post in between the two memes mentioned above was also a doozy. A repeat offender, as it were, since she has posted it several times before, and I have blogged about it here.

Dr Caroline Leaf – Where Angels Fear To Tread

Posted on May 24, 2015 by cedwardpitt

After a day-trip to Movie World, and then a slight distraction by Eurovision, I had a quick look at Facebook before going about my evening chores. Upon reading Dr Leaf’s latest social media meme, I was aghast!

Dr Caroline Leaf is a communication pathologist and self-titled cognitive neuroscientist. Hiding in amongst her “Scientific Philosophy” was this juicy factoid: “Researchers found that intentional thought for 30 seconds affected laser light.” This is, apparently, also proof that prayer can change physical matter.

I actually thought it was God that changed physical matter if He agreed with our prayer requests, and not our prayers themselves, because if it was simply our prayer, then we wouldn’t need God. That’s probably a blog for another time. Still, it was her last statement that caught my attention. Intentional thought can change the properties of laser! I’d never heard that before! I had to find the references.

It turns out that the paper Dr Leaf is referring to is, “Testing nonlocal observation as a source of intuitive knowledge” [1]. In this experiment, Dr Dean Radin, a paranormal researcher, took 5 “experienced meditators” and 5 normal control subjects, and asked them to mentally interfere with a laser beam pointed at a light-reading CCD sensor inside a sealed box. He averaged out the intensity of the light pattern that was read by the CCD. He believed he found a difference in the amount of light that was read by the sensor when the meditators “blocked” the laser light compared to non-meditators and control runs.

In his original paper, Radin published the following graph of his results.

The length of the bars represent a statistical value based on the results, not the actual results of the experiments. The simplest explanation is that the further down the bar goes, the greater the degree of interference to the laser light. Radin believed the effect was caused by the meditators literally interfering with the quantum mechanics of the photons in the laser beam, “observing” them from outside of the box, thus causing their wave function to collapse and stopping them from reaching the sensor.

However, notice that the first few experiments show a large effect, but that this diminishes as the experiments go along, and towards the end, the control groups and the meditator group is actually about the same, with no interference to the laser light at all. This effect is called the Decline Effect, and is common problem amongst studies of the paranormal. It’s a result of a phenomenon called ‘regression to the mean’, or in other words, the more times you perform an experiment, the more likely the results will line up with the true average. I think in Radin’s case, it also had a lot to do with his own expectations.

Radin himself was honest enough to discuss the effect in his paper. In his own words, “Although I had employed numerous design features to avoid artifacts (sic), and only four of the 10 control sessions conducted to that point had gone in the predicted direction, I still found it difficult to believe that the experimental effect was as easily repeatable as the results were suggesting. I knew that if I had trouble believing it, I could hardly expect anyone else to accept these results. So I found that my intentions for the experiment changed – I no longer hoped to observe results solely in the predicted direction, but rather I found myself hoping that some of the remaining sessions would go against the prediction, to validate that the methodology was not biased.” [1]

So, Radin probably caused the effect by wanting to see it. He excluded data that didn’t suit his hypothesis, citing a technical issue with the equipment, and instead focussed on the data set that still seemed to fit. He also performed the analysis of the data, which he biased with his own pre-conceived notions.

The other nail in the coffin for this paper is that it was a pilot study that was done by one researcher, which no one has since tried, or succeeded in, replicating. Indeed, the methodology for this research was based on a series of experiments done by a real physicist with better equipment, Professor Stanley Jeffers, a professor of physics at York University in Toronto, Canada, who performed the experiment about 74 times and found no effect [2].

So, Dr Leaf has cited this isolated, error prone, biased and unconfirmed paper of Radin’s as proof of the ability of thought to change physical matter, and indeed, as prayer’s ability to change physical matter.

This is simply more proof that Dr Leaf is prone to rush in where angels fear to tread, and latch on to any “research” that supports her ideas, no matter how tenuous or unscientific. She did the same thing when she cited a conference poster from a paranormal conference in the early 90’s, and claimed it was definitive proof that our thoughts can change our DNA. In actual fact, the paper was so full of flaws [3: Ch 13, The “ingenuous” experiment] that the only thing it could show was how desperate Dr Leaf is to try and justify her unscientific pet theories.

This tendency for Dr Leaf to rely on such poor science, and link it to fundamental Biblical concepts, dishonours science, the truth of the Bible, and her audience.

I think Dr Leaf would be wise to review her scientific philosophy and the “research” that she uses to justify it, rather than continuing to utilise tenuous and inaccurate articles from studies of the paranormal.

References

[1] Radin D. Testing nonlocal observation as a source of intuitive knowledge. Explore 2008 Jan-Feb;4(1):25-35.

[2] Alcock JE, Burns J, Freeman A. Psi wars: Getting to grips with the paranormal: Imprint Academic Charlottesville, VA, 2003.

[3] Pitt CE. Hold That Thought: Reappraising the work of Dr Caroline Leaf. 1st ed. Brisbane, Australia: Pitt Medical Trust, 2014.

Dr Caroline Leaf – Contradicted by Dr Caroline Leaf

Posted on May 3, 2015 by cedwardpitt

“Who am I?”

It’s one of life’s most fundamental questions. It’s such a quintessentially human question, one that speaks to the importance of our identity as individuals.

It’s a question that Dr Leaf thinks she has the answer to.

Dr Caroline Leaf is a communication pathologist and self-titled cognitive neuroscientist. Recently she launched an on-line program called “Perfectly You”, based on her 2009 book, “The Gift In You” [1]. In “The Gift In You”, Dr Leaf promised that by using her program, you could enable your gift and increase your intelligence to the level that you desire. According to Dr Leaf, your gift is something that’s hardwired into your brain, which makes your gift uniquely yours. For example, she wrote:

“Your gift lies in something so profound yet so simple that we tend to overlook it: the combination of your life experiences with the measurable structure of how your brain has been wired to think and process information.” (p24)

“Neurologically, you are not wired for someone else’s gift. You can try as hard as you want. You can listen to as many teachings as you possibly can. You can buy all the books with an instant formula for a business mogul’s success. You can adopt all of the popular motivational sayings. But even then, you will never have someone else’s gift.” (p11-12)

“You were not built to struggle. Your brain is wired to function according to a specific sequence. When you discover that sequence, that structure, you unlock great potential.” (p13)

“When you know how your gift is structured, how your brain is uniquely wired, and how to achieve lasting success, you will unlock your truth-value – your gift.” (p17)

“The exciting result of this plasticity of the brain that we hold power over is that no two brains are alike: We are uniquely, fearfully and wonderfully made (Psalm 139:14). There is diversity in brain structure and organisation and function, which results in the way we think and approach life.” (p18)

So according to Dr Leaf, our gifts are something that is uniquely hardwired into our brain, something that we cannot change even if we wanted to, and that brain structure gives rise to the way in which we think and the actions that we take.

Then, as I was rereading this book, I came across a sentence that I must have read before when I first got it, but which I hadn’t fully appreciated the significance of until now.

On page 47, Dr Leaf said,

“The mind is what the brain does, and we see the uniqueness of each mind through our gifts. This, in itself is delightful and, intriguing because, as you work out your gift and find out who you are, you will be developing your soul and spirit.” (Emphasis added)

This quote in and of itself isn’t actually that significant until we compare it to a quote from the first chapter of Dr Leaf’s 2013 book, “Switch On You Brain.” [2]

“The first argument proposes that thoughts come from your brain as though your brain is generating all aspects of your mental experience. People who hold this view are called materialists. They believe that it is the chemicals and neurons that create the mind and that relationships between your thoughts and what you do can just be ignored.
So essentially, their perspective is that the brain creates what you are doing and what you are thinking. The mind is what the brain does, they believe, and the ramifications are significant. Take for example, the treatment of depression. In this reductionist view, depression is a chemical imbalance problem of a machinelike brain; therefore, the treatment is to add in the missing chemicals.
This view is biblically and scientifically incorrect.” [2: p31-32] (Emphasis added)

So … Dr Leaf believes that the mind is not what the brain does. So our gifts aren’t uniquely hardwired into our brain, and we should be able to change our gifting if we want to, since it isn’t our brain structures that give rise to the way in which we think and the actions that we take, but it’s all related to our choices.

This must be really embarrassing for Dr Leaf, to so directly call your own beliefs biblically and scientifically incorrect, and then not to notice.

Now, we all make innocent mistakes. No one is perfectly congruent in everything they say. But this isn’t just getting some minor facts wrong. These statements form the foundation for Dr Leaf’s teaching, and are in print in two best selling books, from which she has used to present to countless churches and seminars around the globe.

Which makes her major self-contradiction important for three reasons:

It calls her self-titled expertise as a cognitive neuroscientist into question.
It calls her teaching into question.
It calls her ministry into question.

Firstly, in majorly contradicting herself, Dr Leaf shows desperately little basic knowledge about cognitive neuroscience. Even first year neuroscience students consistently know how the brain works, and are able to build on this to grow their knowledge about the brain. The fact that Dr Leaf can’t get her basic facts straight on something so fundamental as the relationship of the mind and the brain clearly demonstrates that she is not the expert in cognitive neuroscience that she claims to be.

Secondly, in majorly contradicting herself, Dr Leaf undermines all of her teaching. If she can’t be trusted to consistently state basic facts on which she is supposed to have high level training, then how can she be trusted with anything more complicated scientifically. Indeed, how can she be trusted to interpret scripture, in which she has no formal training. Thus, her whole ministry is now thrown into doubt. Dr Leaf may get some facts right in the rest of her writing and in her teaching, but unless you’re an expert in the field, it would be impossible to know. And since she doesn’t reference her work properly, it makes it impossible for the average person to go back to her sources and validate her teaching.

Thirdly, in majorly contradicting herself, Dr Leaf makes it very difficult for churches who have her ministering from their pulpits. Pastors aren’t experts in neuroscience or medicine. How are they supposed to have confidence that what Dr Leaf is saying? How can they be sure that what Dr Leaf is teaching to their congregations is factual or is contradicted by real scientists or her own teaching? How can they be sure that Dr Leaf is not causing some of their more vulnerable parishioners unnecessary harm because her teaching is contradicted by modern science and medicine?

Dr Leaf may believe that she has many answers, and is motivated by the best of intentions. However, to call your own beliefs “biblically and scientifically incorrect” does not instil confidence. Dr Leaf needs to take a serious look at her teaching and the quality of the science that undergirds it, and until that happens, the churches that have invited Dr Leaf to minister from their pulpits should seriously reconsider that decision.

References

Leaf, C.M., The gift in you – discover new life through gifts hidden in your mind. 2009, Inprov, Inc, Texas, USA:
Leaf, C.M., Switch On Your Brain : The Key to Peak Happiness, Thinking, and Health. 2013, Baker Books, Grand Rapids, Michigan:

Dr Caroline Leaf – Scientific heresy

Posted on March 30, 2015 by cedwardpitt

Imagine that this Easter, the guest speaker at your church stands up from the pulpit and calmly mentions during the sermon that Jesus wasn’t really buried in a tomb, but was kept by his disciples in a house until he recovered enough from his wounds to go on his merry way.

What would you think of that speaker? Would you smile and nod, or even shout an ‘amen!’, buy their book, and encourage your pastor that they should be invited back again?

One would hope that there would be a polite but resounding outcry. Even if the rest of the message was perfect, you wouldn’t want someone to come back to your pulpit if they couldn’t get the basics of their subject right, even if they were considered a popular speaker or self-declared expert.

Dr Caroline Leaf is a communication pathologist and self-titled cognitive neuroscientist. Dr Leaf preaches every day from both physical pulpits all over the globe, and a virtual pulpit through the power of Instagram and Facebook.

Dr Leaf used her position of social media prominence today to share this little jewel, “The brain cannot change itself; you, with your love power and sound mind, change your brain.”

Um … that’s not true … at all … in any way.

For a start, the most prolific period for brain development is actually pre-birth, and then the first year of life. But foetal brains don’t have their own thoughts. It’s not like the movie “Look Who’s Talking” inside the average uterus. The brain of an unborn baby is growing and changing at an exponential rate without any thoughts to guide them [1].

Number of synapses per constant volume of tissue as a function of pre- and postnatal age. (Stiles, J. and Jernigan, T.L., The basics of brain development. Neuropsychol Rev, 2010. 20(4): 327-48 doi: 10.1007/s11065-010-9148-4)

In our adult years, our brain still continues to develop. But that development isn’t dependant on our thought life. Significant consolidation of our brain’s neural pathways occur when we’re asleep [2], but our thought life isn’t active during sleep.

Model of sleep stage-specific potentiation and homeostatic scaling. (Gronli, J., et al., Sleep and protein synthesis-dependent synaptic plasticity: impacts of sleep loss and stress. Front Behav Neurosci, 2013. 7: 224 doi: 10.3389/fnbeh.2013.00224)

Indeed, real cognitive neuroscientists have shown that our stream of thought is simply a tiny fraction of our overall neural activity, a conscious glimpse of the brains overall function [3-5]. So you don’t change your brain at all. “You” can’t, because it’s your brain’s directed activity which causes the growth of new synaptic branches to support it, all of which is subconscious.

Therefore, suggesting that our brain can only change with our conscious control is patently false, and so clearly against the most fundamental principles of neuroscience that such a claim is the neuroscientific equivalent of saying that Jesus didn’t die on the cross, he just swooned.

Dr Leaf has committed scientific heresy.

At this point, supporters of Dr Leaf often suggest that she wasn’t speaking literally, but metaphorically. She didn’t really mean that the brain can’t change itself, just that our choices are really important.

Somehow I doubt that. Dr Leaf wasn’t being metaphorical when she claimed that her patients in her research projects grew their intelligence when they “applied their minds”:
“Now with a traumatic brain injury, basically IQ generally goes down around twenty points because of the kind of damage with traumatic brain injury. Well her IQ was 100 before the accident, it was 120 after the accident. So here with holes in her brain, and brain damage, she changed … she actually increased her intelligence. Now I’m pretty convinced at this stage, cause I’ve been working … besides her I’ve been working with lots and lots of other patients, seeing the same thing, when these students applied their mind, their brain was changing, their academic results were changing.” [6]

Dr Leaf believes that your mind can literally change your brain. It was the subject of her entire TEDx talk in February.

It sounds innocent enough until you consider the broader implications of this way of thinking – those with brain damage haven’t recovered fully because they just haven’t applied their minds enough. The same for those with learning disabilities or autism, ADHD, Downs syndrome, cerebral palsy, dyslexia, or any other neurological disorder … because you only need to “apply your minds” to change your brain. “You have a powerful mind. You have a sound mind. You have a mind that is able to … to achieve what you’re dreams are. You are as intelligent as you want to be.” [6]

Or, in other words, don’t blame it on your brain if you’re intellectually disabled, mentally ill, or vacuous. You simply haven’t applied your brain well enough. Stop sitting around and think better.

As a church, we can, and should, be doing a lot better for those amongst us who suffer from neurological and mental disorders. It starts by being more judicious with who is allowed at that privileged position of the pulpit. We need to be eliminating scientific heresy from the pulpit, not clapping and shouting ‘amen!’

References

Stiles, J. and Jernigan, T.L., The basics of brain development. Neuropsychol Rev, 2010. 20(4): 327-48 doi: 10.1007/s11065-010-9148-4
Gronli, J., et al., Sleep and protein synthesis-dependent synaptic plasticity: impacts of sleep loss and stress. Front Behav Neurosci, 2013. 7: 224 doi: 10.3389/fnbeh.2013.00224
Baars, B.J., Global workspace theory of consciousness: toward a cognitive neuroscience of human experience. Progress in brain research, 2005. 150: 45-53
Baars, B.J. and Franklin, S., An architectural model of conscious and unconscious brain functions: Global Workspace Theory and IDA. Neural Netw, 2007. 20(9): 955-61 doi: 10.1016/j.neunet.2007.09.013
Franklin, S., et al., Conceptual Commitments of the LIDA Model of Cognition. Journal of Artificial General Intelligence, 2013. 4(2): 1-22
Leaf, C.M., Ridiculous | TEDx Oaks Christian School | 4 Feb 2015, 2015 TEDx, 20:03. https://http://www.youtube.com/watch?v=yjhANyrKpv8

The TEDx Users Guide to Dr Caroline Leaf

Posted on March 26, 2015 by cedwardpitt

On the 4th of February 2015, Dr Caroline Leaf gave her debut TED presentation, at TEDx Oakes Christian School, California.

Most TED watchers wouldn’t have heard of her before, but Caroline Leaf is a well-known name in western Christendom. She has spoken from pulpits on every continent. She’s authored one of the best selling books in the Christian market and has her own TV show on cable in the US. She’s followed by more than one hundred thousand people on Facebook, and she’s even run her own conference, with another in the pipeline. She’s a mega-star in the Christian world.

So who is this woman with the stiletto-heels and slick presentation? What was her training and background? How did she make it to the TEDx stage?

This aim of this post is to provide some context and background for those in the TED universe who have seen Dr Leaf’s TEDx presentation, and want some more information in assessing her TEDx debut, and indeed, the global Caroline Leaf phenomenon.

This review will be in four main parts: first I will give some basic information on Dr Leaf, I will compare Dr Leaf’s claims in her TEDx presentation to her published research results and some basic neuroscience, and lastly I’ll outline Dr Leaf’s general work and it’s accuracy compared to current science.

WHO IS DR LEAF?

Dr Caroline Leaf was born and raised in South Africa, where she completed her school education and went on to attain the following degrees:

Bachelors of Science (Logopaedics) – University of Cape Town 1985
Masters in Audiology and Speech Pathology – University of Pretoria 1990
Doctor Philosophiae (Communication Pathology) – University of Pretoria 1997 (http://drleaf.com/assets/files/DrCarolineLeaf_CurriculumVitae1.pdf)

Officially, Dr Leaf is qualified as a communication pathologist (which is a specialized combination of Speech Pathology and Audiology – see also: http://www.hpcsa.co.za/Uploads/editor/UserFiles/downloads/speech/slh_education_training_insitutions.pdf)

Dr Leaf worked for a number of clinics and school boards as a communication pathologist in the few years following the completion of her PhD (http://drleaf.com/assets/files/DrCarolineLeaf_CurriculumVitae1.pdf).

Dr Leaf has written a number of articles for publication in minor journals (see http://drleaf.com/assets/files/DrCarolineLeaf_CurriculumVitae1.pdf). Three of her papers were published in a small Medline indexed journal, “The South African Journal of Communication Disorders”. These are:

“Mind-Mapping approach (MMA): a culture and language “free” technique”, 1993 (http://www.ncbi.nlm.nih.gov/pubmed/8047932)
“The development of a model for geodesic learning: the geodesic information processing model”, 1997 (http://www.ncbi.nlm.nih.gov/pubmed/9819969)
“An alternative non-traditional approach to learning: the metacognitive-mapping approach”, 1998 (http://www.ncbi.nlm.nih.gov/pubmed/10472179)

The journal happened to be edited by her supervisor and co-author, Dr Brenda Louw (see http://www.debunkingdrleaf.com/goodies), though I’m sure the selection of her articles for this journal was purely on merit.

Dr Leaf states on a number of occasions that she is a “cognitive neuroscientist”, and “a scientific and Biblical expert in the power of the human mind”. Leaf Cognitive Neuroscientist

This is despite the fact that Dr Leaf:

does not have formal qualifications in neuroscience,
has not worked at a university as a neuroscientist,
has not worked in any neuroscience research labs,
has not published any papers in neuroscience journals, and
has not had any formal theological training.

Given the weight of evidence, Dr Leaf would be better described as an academic speech pathologist and lay preacher rather than a cognitive neuroscientist.

DR LEAF’S RESEARCH RESULTS

Throughout her TEDx presentation, Dr Leaf repeatedly made reference to the results of her own research, suggesting that her pioneering work resulted in radically improved outcomes for the students involved in her research, and that her work with students one-on-one and through teacher education profoundly changed the learning of every student in her various programs.

For example, she said, “Well her IQ was 100 before the accident, it was 120 after the accident. So here with holes in her brain, and brain damage, she changed … she actually increased her intelligence. Now I’m pretty convinced at this stage, cause I’ve been working … besides her I’ve been working with lots and lots of other patients, seeing the same thing, when these students applied their mind, their brain was changing, their academic results were changing.”

Later she stated, “I wasn’t sure if this was going to have the same impact cause until this point I’d been working one on one. Well I’m happy to tell you that we had the same kind of results … The minute that the teachers actually started applying the techniques, we altered the trend significantly.”

And also, “I stand up here saying this with conviction because I have seen this over and over and over in so many different circumstances … in this country I worked in Dallas for three years in charter schools, and we found the same thing happening.”

However, her published results differ significantly from her claims.

The first research that Dr Leaf spoke of was of the sixteen-year-old girl who was the victim of a motor vehicle accident. This particular girl was Dr Leaf’s prime patient. The case study of this patient was presented in Dr Leaf’s unpublished Masters thesis, and was discussed in more detail in Dr Leaf’s paper, “Mind-Mapping approach (MMA): a culture and language “free” technique” [1], though it should be noted that no statistics were published in this paper, and on the third page of the article, Dr Leaf admitted that the result could actually have been spontaneous recovery rather than her own intervention.

Dr Leaf did further work within a number of schools for her PhD research. Dr Leaf compared the academic results for three schools for the years 1991 and 1992 to the results for 1993, during which she introduced her mind mapping approach (MMA). Generally, the results for 1993 were better than the results for 1992, which seems to indicate that Dr Leaf’s MMA training was effective. However, the results from 1991 to 1992 were already improving without her input [2: p182]. The difference in average marks between 1991 and 1992 was 1.76%, while the difference between 1992 and 1993 (the introduction of Dr Leaf’s MMA) was only 2.19%. If Dr Leaf’s program really was the cause of that improvement, then her program only resulted in a 0.43% improvement on average.

I have reproduced Dr Leaf’s original graph of the average overall results obtained in her PhD study. While Dr Leaf’s original graph makes her data look spectacular, when appropriately rescaled, the data looks quite ordinary.

At best, Dr Leaf’s program gave the already positive momentum of the students a gentle nudge.

However, it should be noted that her program may have also hindered some students. Dr Leaf notes in her analysis: “The results obtained indicate that in general the academic trend in the three primary remedial schools was altered with the introduction of the MMA methods in 1993. Furthermore, it appears that the most positive response occurred in phase one (grades 1 and 2, standard 1). A positive response also occurred in phase two (standards 2-4) but this change was just outside the significance level. Phase three (standard 5), by contrast, experienced negative effects with the introduction of the MMA methods.” [2: p181]

So to summarise, according to Dr Leaf’s own data, there was no clear benefit derived from her MMA program.

Dr Leaf then discussed her work in a number of charter schools that she performed in Dallas. This was part of testing of a program called the Switch On Your Brain 5-step learning process.

Dr Leaf claims that, “The Switch On Your Brain with the 5-Step Learning Process® was assessed in a group of charter schools in the Dallas. The results showed that the students’ thinking, understanding and knowledge improved across the board. It was concluded that The Switch On Your Brain with the 5-Step Learning Process® positively changed the way the students and teachers thought and approached learning.” http://drleaf.com/about/dr-leafs-research/

However, there has been no independent research into Dr Leaf’s Switch On Your Brain learning program or even the Geodesic Information Processing Theory, the theory Dr Leaf devised and on which the Switch On Your Brain program is based.

Dr Leaf published her own internal research into the program on her website. The project was a two year program involving teachers and students at a group of four schools in the Advantage Academy group in Dallas, Texas. This involved working with more than 150 teachers and 2000 students.

Despite her glowing self-assessment, Dr Leaf’s own published numbers suggest that the program is ineffective, or quite possibly a hindrance. For example, the graph below demonstrates the qualitative analysis of “content mastery” (which the paper describes as a combination of knowledge and understanding) for reading across all grades from 3rd to 12th, compared with the results from the previous year before the Switch On Your Brain was implemented. Dr Leaf omits a basic statistical analysis, but just by looking at the similarity of the scores, these results are more likely to be a chance effect, except for the 12th grade, where the previous cohort of students increased dramatically, where as the Switch On Your Brain cohort got slightly worse.

Rather than blame her program, Dr Leaf simply shifts the blame to the teachers: “The few cases where we see drops can be linked to teacher knowledge, attitude and skills and is diagnostic.”

The full research paper that Dr Leaf published is available at http://drleaf.com/assets/files/Web-page-AA-research-project-1.pdf if you wish to review the results for yourself.

The ineffectiveness of Dr Leaf’s program may be for many reasons, but I believe one is that it is built on a theory that relies on mind-mapping. Dr Leaf renamed her version of mind-mapping “The Metacog”, though it’s clear from her early academic work [1] that the Metacog and the Geodesic Information Processing Model [3] were based on the work of Tony Buzan. Buzan’s concept of mind-mapping has been used across multiple professional fields [4] and remains a valuable resource for brainstorming or gathering thoughts in a visual way. However, modern research (including a controlled trial within a primary school classroom environment) shows that mind mapping is a poor tool for learning [5-8].

DR LEAF’S IRONIC INSPIRATIONS

Dr Leaf openly contradicts herself throughout her presentation, failing to realise that the stories she shared of her own patients disproved her vacuous inspirational memes.

Our biology affects each and every one of us. Our mind is a function of our brain. Our mind is to our brain as our breath is to our lungs. Put simply, without our brain, we would have no thoughts. If the structure and function of specific networks in our brains are altered, this changes our thinking. This is confirmed in everyday life – when someone suffers a brain injury or a stroke and they sustain damage to their brain, they suddenly lose the function of some, or all of their mind or body. Trans-cranial Magnetic Stimulation, Trans-cranial Direct Current Stimulation, metabolic states, prescription medications, illicit drugs, or everyday drugs like caffeine or alcohol have all been proven to change the subjects mental state through changes to the function of their brain. Any suggestion that our brain does not control our mind is simply ludicrous.

Clearly then our biology does control our psychology. Real cognitive neuroscientists have shown that our stream of thought is simply a tiny fraction of our overall neural activity, a conscious glimpse of the brains overall function [9-11], like the tachometer is for the engine in your car. Thus, our mind does not change our brain at all. Rather, it is our brain’s directed activity causing the growth of new synaptic branches to support it, something which the brain does without the function of conscious thought from the time when we were embryos.

Dr Leaf actually confirms this fact through her stories of her brain injured patients. After all, if “the mind is separate from the brain but influencing the brain”, then how could those victims of acquired brain injury lose cognitive function after their injury? If it were true that “each and every one of us is not a victim of our biology. We are a victor over and above our biology. We control our brain, our brain does not control us”, then how could those people with damage to their brains from strokes suddenly lose function?

The fact that Dr Leaf’s patients lost their mental or cognitive function because of damage to their brains directly contradicts her insistence that our brain and our mind are separate, and that our brain does not control our mind.

FUNDAMENTALS OF DR LEAF’S OTHER TEACHING

Considered altogether, Dr Leaf’s teaching boils down to a few fundamentals;
* Thought is the main driving force that controls every other aspect of our lives (and our physical world).
* We have full control over our thoughts.
* Thought causes stress.
* Stress is directly responsible for nearly all serious physical and mental illness.
* Therefore thought causes the vast majority of human disease, making thoughts toxic, and
* If toxic thoughts cause disease, “detoxing” thoughts will cure or prevent disease.

On first inspection, each individual postulate doesn’t seem so bad. However, when fully considered and taken to their natural conclusions, they veer into conjecture and pseudoscience, as evidenced by Dr Leaf’s published works and public appearances.

For example, Dr Leaf states in her books:

“Thoughts influence every decision, word, action and physical reaction we make.” [12: p13]
“Our mind is designed to control the body, of which the brain is a part, not the other way around. Matter does not control us; we control matter through our thinking and choosing.” [13: p33]
“DNA actually changes shape according to our thoughts.” [13: p35]

On Facebook and in interviews, this translates to:

“Our genetic makeup fluctuates by the minute based on what we are thinking and choosing.” 27/9/2014
“The toxic thoughts in our minds become physical baggage in our brain, which literally cause brain damage.” 5/12/2014, 27/10/2014 and 7/10/2014
“Your mind will adjust your body’s biology and behaviour to fit with your beliefs.” 21/6/2014

“SID ROTH: But when you told me that we could change our genes I wish every doctor in the world would understand this cutting edge research because, you know, you go to a doctor and say your cholesterol was high, and they say, well, exercise, change your diet, but it could be your genes and there’s nothing you can do, so take this medicine that will have a zillion side effects. But you say, according to the latest brain research, if you follow what Jesus said you can change your genes. That’s just so amazing.
DR. LEAF: I know. It is phenomenal. If you think of it, it’s logical too, Sid …”
http://youtu.be/Uhbt_XOZTdA?t=50s. Full transcript: http://donate.sidroth.org//site/DocServer/IS571Transcript_Leaf.pdf?docID=2941

Dr Leaf draws her erroneous conclusions from the poor interpretation of poor evidence. For example, one of Dr Leaf’s favourite factoids is her statement that “Research shows that 75 to 98 percent of mental, physical and behavioral illness comes from one’s thought life.” [13: p33] Dr Leaf’s sources for this statement include, among others, an article that not only doesn’t mention the figure she attributes to it, but also directly contradicts her fundamental premise [14], and the misleading paraphrasing of an already dubious quote from a pseudoscientific author [15].

Dr Leaf also has a number of pet theories which betray her preference for pseudoscience, the main one being her assertion that the heart is actually a mini-brain that has dedicated cognitive functions. For example, in her books, she says,

“Your heart is in constant communication with your brain and the rest of your body, checking the accuracy and integrity of your thought life. As you are about to make a decision, your heart pops in a quiet word of advice, well worth listening to, because when you listen to your heart, it secretes the ANF hormone that gives you a feeling of peace.” [12: p62, 13: p127]

Dr Leaf directly quotes the work of an organisation called HeartMath for her evidence that the heart acts as a mini-brain. Dr Leaf, via Heartmath, states that:
> The heart has a network of 40,000 neurons within it, called sensory neurites, which detect circulating hormones, neurochemicals, and sense heart rate and blood pressure,
> The heart secretes “neurotransmitters” and other hormones, which have an effect on the brain, such as atrial natriuretic factor, and oxytocin,
> The heart communicates with the brain and the rest of the body through neurological, biophysical, biochemical and “energetic” (ie: electromagnetic) means [16, 17].

HeartMath clarifies, “The heart’s brain is an intricate network of several types of neurons, neurotransmitters, proteins and support cells like those found in the brain proper. Its elaborate circuitry enables it to act independently of the cranial brain – to learn, remember, and even feel and sense.” [16]

So the “evidence” looks plausible on the surface, but absurd when considered in a broader biological context. For example, my heart may have 40,000 neurons, many of which are sensitive to circulating hormones, neurochemicals and which sense and feel, but then again, so does my rectum. Does my rectum have a mini-brain as well? Clearly not. The only brain you have is the one in your cranium. We do not think with our heart, our rectum, or any other body part.

A more in-depth rebuttal of Dr Leaf’s scientific claims can be found in my book: “Hold That Thought – Reappraising the work of Dr Caroline Leaf”, via Smashwords (https://www.smashwords.com/books/view/466848) or iTunes (https://itunes.apple.com/us/book/hold-that-thought/id908877288?mt=11).

SUMMARY

The opening question from Dr Leaf’s presentation at the 2015 TEDx Oaks Christian School was, “Can the mind change the brain?”

Clearly the answer is: “No, it can not.”

Others are welcome to disagree, but in my humble opinion, I suggest that Dr Leaf is a pseudoscientist, and that her appearance on the TEDx stage is not based on scientific acumen, but on popularity and reputation, which in turn, is based on slick self-promotion and an availability cascade (a self-reinforcing process by which an idea gains plausibility through repetition).

Dr Leaf’s ideas may have popular approval, but TEDx is a vehicle for ideas worth spreading, not ideas that are popular. According to its guidelines, TEDx requests that pseudoscience be avoided, specifically stating, “TED and TEDx are platforms for showcasing and explaining genuine advances in science … Speakers should avoid the misuse of scientific language to make unsubstantiated claims.” (http://www.ted.com/participate/organize-a-local-tedx-event/before-you-start/tedx-rules)

Dr Leaf’s claims, that her research has significantly changed the lives of the students who were blessed to receive it, is simply not born out by any of her own published data – from her original case study through to her MMA project and her Switch On Your Brain program. Whatever the underlying reason … whether its hubris, naivety, or denial that’s driving her continued promotion of her own programs … her claims are baseless, and therefore an argument can be made that she breached the TEDx guidelines in presenting them, and indeed, she should never have been invited to deliver them from a TEDx stage in the first place.

The theme for the 2015 TEDx Oaks Christian School event was “Ridiculous”. I would argue that it was ridiculous that Dr Leaf promoted her research as life changing when in reality, it’s not much better than a placebo. It was ridiculous that Dr Leaf would share stories of the changes to the cognitive functioning of her patients from their brain damage and then claim that the brain does not influence the mind. It seems that Dr Leaf’s presentation certainly fitted their theme, although probably not in the way they intended. Lets hope for their sake that their “ridiculous” decision doesn’t effect their ability to host future TEDx presentations.

Of course, that’s just my opinion. What do you think, TEDx universe?

REFERENCES

Leaf, C.M., et al., Mind-Mapping approach (MMA): a culture and language” free” technique. The South African journal of communication disorders. Die Suid-Afrikaanse tydskrif vir Kommunikasieafwykings, 1993. 40: 35
Leaf, C.M., The Mind Mapping Approach: a model and framework for geodesic learning, in Department of Communication Pathology, Faculty of Arts1997, University of Pretoria: Pretoria. p. 266.
Leaf, C.M., et al., The development of a model for geodesic learning: the geodesic information processing model. The South African journal of communication disorders. Die Suid-Afrikaanse tydskrif vir Kommunikasieafwykings, 1997. 44: 53
Eppler, M.J., A comparison between concept maps, mind maps, conceptual diagrams, and visual metaphors as complementary tools for knowledge construction and sharing. Information Visualization, 2006. 5(3): 202-10
Farrand, P., et al., The efficacy of the `mind map’ study technique. Medical Education, 2002. 36(5): 426-31 doi: 10.1046/j.1365-2923.2002.01205.x
Wickramasinghe, A., et al., Effectiveness of mind maps as a learning tool for medical students. South East Asian Journal of Medical Education, 2007. 1(1): 30-2
D’Antoni, A.V., et al., Does the mind map learning strategy facilitate information retrieval and critical thinking in medical students? BMC Med Educ, 2010. 10: 61 doi: 10.1186/1472-6920-10-61
Merchie, E. and Van Keer, H., Spontaneous Mind Map use and learning from texts: The role of instruction and student characteristics. Procedia – Social and Behavioral Sciences, 2012. 69: 1387-94
Baars, B.J., Global workspace theory of consciousness: toward a cognitive neuroscience of human experience. Progress in brain research, 2005. 150: 45-53
Baars, B.J. and Franklin, S., An architectural model of conscious and unconscious brain functions: Global Workspace Theory and IDA. Neural Netw, 2007. 20(9): 955-61 doi: 10.1016/j.neunet.2007.09.013
Franklin, S., et al., Conceptual Commitments of the LIDA Model of Cognition. Journal of Artificial General Intelligence, 2013. 4(2): 1-22
Leaf, C., Who Switched Off My Brain? Controlling toxic thoughts and emotions. 2nd ed. 2009, Inprov, Ltd, Southlake, TX, USA:
Leaf, C.M., Switch On Your Brain : The Key to Peak Happiness, Thinking, and Health. 2013, Baker Books, Grand Rapids, Michigan:
Cohen, S., et al., Psychological stress and disease. JAMA: the journal of the American Medical Association, 2007. 298(14): 1685-7
Lipton, B.H., The biology of belief: Unleashing the power of consciousness, matter and miracles. 2008, Hay House, Inc:
Rosch, P. Emotional balance and health. Science of The Heart: Exploring the Role of the Heart in Human Performance – An Overview of Research Conducted by the Institute of HeartMath 2013 [cited 2013, 16/7/2013]; Available from: http://www.heartmath.org/research/science-of-the-heart/emotional-balance-health.html.
Rosch, P. Head-Heart Interactions. Science of The Heart: Exploring the Role of the Heart in Human Performance – An Overview of Research Conducted by the Institute of HeartMath 2013 [cited 2013, October 20]; Available from: http://www.heartmath.org/research/science-of-the-heart/head-heart-interactions.html.

Dr Caroline Leaf – Feed your children manure???

Posted on March 19, 2015 by cedwardpitt

I was entertained somewhat by Dr Leaf’s latest Facebook post this evening. In it, there was a pairing of water and a pot-plant, and sugary drinks and a child, with the words, “If you give this (water) to your plants? Why give this (sugary beverages) to your children.”

Without looking too closely, one might think that Dr Leaf was making a good point. Water is good, and sugar is bad, right?

With just a little more thinking, one can see that the metaphor is pretty weak. Plants aren’t children. Following the same logic of the metaphor, I should feed my children manure instead of food, since it’s clearly good enough for the pot-plant.

What is worrying about this post is Dr Leaf’s linking of diet with our Christian morals. Dr Leaf tries to link the concept of drinking water to the worship of God, because your body is a temple, and “Whether you eat or drink, or whatever you do, do it all for the glory of God.” (1 Corinthians 10:31). By logical extrapolation, Dr Leaf is therefore saying that drinking Coke is dishonouring God and the temple he gave for you. If you drink Coke, then you’re a bad Christian.

Though that’s really only Dr Leaf’s interpretation, because the scripture that she quotes isn’t talking about the composition of the food you eat but about it’s relationship to the sacrifice to idols. As far as I was aware, Coke isn’t used in any worship of idols before it’s bottled and distributed. So really, I don’t think whether you drink coke or other sodas will have any bearing on your relationship with God.

Perhaps Dr Leaf would have better spent her time outlining the studies that back up her overly dramatic statement “that sugary drinks like soda and processed orange juice can cause neurochemical havoc in your brain” rather than just hoping people will take her at her word.

Lets be real … no one in their right mind is encouraging children to have more sugar, mainly because of the excess calories, and not the hysterical notion of “neurochemical havoc”. Dr Leaf’s trying to get it right, but her poor metaphor, and the linking of ones diet to ones honouring of God probably went a step too far.

It would be nice if Dr Leaf could reexamine her knowledge of nutritional science and the scriptures that she uses so that she doesn’t weaken her credibility with such posts in the future.

Dr C. Edward Pitt

Faith, Hope, Love, Science.

Category Archives: Caroline Leaf

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