In How Anecdotal Evidence Can Undermine Scientific Results, Michael Shermer has some interesting thoughts on anecdotal evidence. He states that humans are more inclined to think anecdotally than to think scientifically. He puts this down to an evolutionary imperative to pay attention to perceived danger, with false positives (i.e. false alarms) being relatively harmless, but false negatives (perceiving there to be no danger when in fact there is) potentially fatal. According to Shermer the human brain is therefore not adapted to weed out false positives. This requires scientific thinking, which does not come naturally to most people.
Shermer describes how the post hoc ergo propter hoc fallacy and correlation causation confusion led to anecdotes triumphing over science in the autism caused by vaccine controversy.
More on anecdotal evidence can be found in this Wikipedia article.
Thursday, July 31, 2008
Anecdotal evidence
Saturday, July 12, 2008
Brain Gym SA: Have they done the right thing?
Brain Gym South Africa has just had a national conference in Cape Town. Have they come clean and done the right thing? Did the bigwigs of the quacking granfalloon inform the rank and file of the organisation, as well as their unsuspecting customers, of the crisis of scientific legitimacy they're facing? If not, I would suggest that they now have a serious ethical problem.
Brain Gym has long been controversial and many observers have held it to be pseudoscientific nonsense and to lack evidence for effectiveness. The scientific evidence against core Brain Gym theories and claims is now very convincing. The past year has been an annus horribilis for Brain Gym International, it being exposed to be quackery by Dr. Ben Goldacre in the British press and its founder, Dr. Paul Dennison, being humiliated on British television. I've described the whole affair fully a previous post, Brain Gym faces a Perfect Storm!, links included.
The press exposé forced Brain Gym in Britain to make the following admission on its website:
"The UK Educational Kinesiology Trust makes no claims to understand the neuroscience of Brain Gym®. The author has advised that the simple explanations in the Brain Gym Teachers Edition about how the movements work are hypothetical and based on advice from a neurobiologist at the time the books were written."The admission, however, now seems to have been removed from their website and I could find no indication on any Brain Gym affiliated website of these and other admissions and the events that preceded them. Brain Gym seems to be lying low and hoping that the storm will pass.
This is another admission published in the British Times Online:
"The creators of an educational exercise programme used in hundreds of schools in England have agreed to withdraw unsubstantiated scientific claims in their teaching materials. ... Paul Dennison, a Californian educator who created the programme, admitted that many claims in his teacher’s guide were based on his “hunches” and were not proper science."Some years ago I challenged a Brain Gym practitioner at the then Witwatersrand Technikon, to reveal to students who were being subjected to Brain Gym, the pseudoscientific nature of its claims. He declined and admitted that any positive effect of Brain Gym was due to placebo and Hawthorne effects; also that suggestion played a role in any positive effect. He could thus not agree to my challenge. Predictably, he ascribed placebo and Hawthorne effects to the "unpredictable and mystical" influence of quantum physics. I questioned the ethics of bullshitting the students of a university of technology about scientific facts, but never received an answer.
I suspect that Brain Gym is now in the same quandary, it can't reveal its true pseudoscientific nature, as that would destroy any placebo-based positive effects. Its credibility is at stake as well. That's the price it is paying for quacking and for mispresenting itself as a science, when in fact it is very much an alternative and controversial form of therapy.
I've probably spent too much time on Brain Gym on the blog - hopefully this will be the last for a while. It was necessary because it is the most widespread and influential form of quackery in South African education. I shall continue checking Brain Gym websites to see whether they come clean, but I won't hold my breath.
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Leon Stander
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Saturday, July 5, 2008
Quackery in South Africa: The SCIO/QXCI
In July 2007 the South African press reported gleefully about strange diagnoses made by a rural medical doctor using a so-called quantum diagnostic device, the Quantum Xrroid Consciousness Interface, or SCIO/QXCI. The initial report appeared in the Beeld newspaper under the heading Man 'angry with wife's vagina'. Now I realise that the press often misquotes people and that sensational reports of this nature should be taken with a pinch of salt. To my knowledge, however, the doctor concerned has never publically repudiated the newspaper report. He explained to the newspaper reporter that:
The diagnoses made by SCIO/QXCI-device re. the patient (a 50 year old male) included:
According to the patient the doctor indicated that the machine probably detected vaginal problems because he was angry with his wife's vagina! To the press the doctor said that the vaginal symptoms arose because the system picked up frequencies of problems in the subconscious mind, or problems experienced by the women in one's life, like one's wife, sister or mother.
Up to this point it was just a single rural doctor who had made a fool out of himself. The report indicated, however, that more than 130 of these devices are in use in South Africa. Another report in the Rooi Rose, a women's magazine, indicated that many more similar devices are in use.
I'm neither a medical doctor, nor a physicist, but on just common sense reading of the South African SCIO/QXCI website, it was clear to me that it is total nonsense. While I can understand homeopaths and others from the so-called alternative health professions falling for this kind of nonsense, I find it inconceivable that conventional medical practitioners and others trained in scientific medicine do so as well.
Dr. Stephen Barrett's Quackwatch is normally a good resource when researching dubious devices and practices. He has an informative article on the SCIO/QXCI and its inventor, one William C. Nelson. It is clear from Barrett's article that the device's history is steeped in controversy and misrepresentation. The character of its inventor, Nelson, certainly does not inspire confidence in the what is so clearly a quack device.
Barrett concluded:
"The Quantum Xrroid device is claimed to balance "bio-energetic" forces that the scientific community does not recognize as real. It mainly reflects skin resistance (how easily low-voltage electric currents from the device pass through the skin), which is not related to the body's health. It is promoted with elaborate pseudoscientific explanations and disclaimers intended to protect its practitioners from prosecution. Use of the device can cause unnecessary expense as well as delay in getting appropriate treatment. If you encounter a practitioner who uses one, please ask the appropriate government agencies to investigate."
Medical practitioners, therapists and psychologists who use this device may find it instructive to read Barrett's article (if they did before they may never have acquired it in the first place). They should then realise the danger it holds for their professional reputations.
A further post on the SCIO with more information the scam can be found at Silly season: The SCIO/QXCI.
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Thursday, July 3, 2008
Quackery in South Africa: The Human PIN Code
The South African paediatrician and poet, C. Louis Leipoldt, at that time the editor of the South African Medical Journal, wrote in July of 1927:
"Nowhere perhaps is the public so ill educated concerning quackery as in South Africa."He would have have been surprised to find that 80 years later little has changed and that quackery still abounds. Here is an example that reached the press during the past year.
Human PIN Code
A human PIN code? No, its not the crazy idea of a teenager playing with SMS or MXit on his cell phone. It is a South African bullshit idea contrived by a Dr. Douglas Forbes. This is how it's described on his website:
"Physicist and author Douglas Forbes has devised a method of analysing the individual human personality, as imprinted on each of us on our day of birth. Developed over two decades and using tens of thousands of case studies, The Human Pin Code reveals who we are, what our destiny is, what relationships will work best for us and how to find solutions to our problems."and
"Douglas has taken 22 years and 30 000 case studies to find how to calculate the energy of the day you were born. The day's energy has a destiny and can be calculated. The choices lies with you. The accuracy of this is between 95-99%. Dealing with energy, you deal with perspective. The perspective of your choices and your reaction to those choices. Each birthday is calculated and uses Carl Jung's archetype to establish your purpose and path in life."An article in Wikipedia describes the process as follows:
By "separating time and space, against the classical view of spacetime", a relatively simple mathematical model has been developed which is claimed to be "effective in its application" and "99% accurate" in reading a personality.Can anyone believe such nonsense? According to the anecdotes and testimonials on Forbes's website, some apparently do. All the testimonials, however, are anonymous. This is the only one with a name attached, one Marion Anne Cloete, who is described as a psychophonetics counsellor who was the 2004 Woman of the Year. I've never previously heard of psychophonetics, but a web search shows it seems to be an Australian brand of nonsense. There were nine category winners of the 2004 South African Woman of the Year award, none of them named Marion Anne Cloete.
According to the critical article linked to at the end of the post, Forbes claims to be physicist with a Phd from the University of Metaphysics. This seems to be a contradiction in terms, to say the least!
The saga of the PIN code takes an interesting turn with the following claims by one Sebastian Rook on the blog of Helmar Rudolph:
"Having helped create the Pin Code many years ago, ... , I can assure you that the Pin Code is a scam. It was designed to make money. That is all. Of course, you are quite welcome to continue believing in it. It is the perfect tool for unambiguous interpretation due to the active and reactive elements of each number. It just can't let you down. It is the perfect fraud. And, I am rather proud of its success."and
"Yes, it was indeed my intention to scam people. Is that not good business sense? What do you think advertisement is? Evangelical commercialism? Why is it that when an author of fiction creates misleading information, it is called creativity, and when an esoteric author does it, it's called fraud? It's simply a good scam designed to appeal to a gullible niche market - just like my recently-published Fairytales. And why you ramble on about Active and Reactive elements to someone who pulled both ideas out of his very substantial hat, is a mystery to me! You can hardly lecture me on something I created, eh?"Unsubstantiated to be sure, but considering the absolute nonsense that is the PIN code, credible.
More information about the origin of the PIN code can be found on the blog quantum resonance.
Considering the Human Pin Code workshops scheduled on Forbes's website for the rest of the year (Johannesburg, Instanbul, Czech Republic, San Francisco, Los Angeles, Melbourne, Brisbane, Tasmania, Toronto, Vancouver, Geneva, Istanbul), he has no shortage of willing fools. After all, was it PT Barnum who said that there's one born every minute? And was Leipoldt wrong? After eighty years, many in the rest of the world seem as gullible as many South Africans do.
Read more about the human pin code (if you really want to) at Wikipedia and The Human PIN Code: fad, fiction or fallacy?
If the Human Pin Code is harmless nonsense, the same cannot be said about the Quantum Xrroid Consciousness Interface, or SCIO/QXCI. This device featured in the South African press recently when a medical doctor used it to diagnose vaginal problems in a male patient. More about this in my next post.
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