Archive for Neuroscience/Mental Health

The Power of Replication – Bems Psi Research

I love reading quotes by the likes of Karl Popper in the scientific literature. A recent replication of Bem’s infamous psi research, Feeling the Future, gives us this quote:

Popper (1959/2002) defined a scientifically true effect as that “which can be regularly reproduced by anyone who carries out the appropriate experiment in the way prescribed.”

The paper is the latest replication of Daryl Bem’s 2011 series of 9 experiments in which he claimed consistent evidence for a precognitive effect, or the ability of future events to influence the present. The studies were published in The Journal of Personality and Social Psychology, a prestigious psychology journal. All of the studies followed a similar format, reversing the usually direction of standard psychology experiments to determine if future events can affect past performance.

In the 9th study, for example, subjects were given a list of words in sequence on a computer screen. They were then asked to recall as many of the words as possible. Following that they were given two practice sessions with half of the word chosen by the computer at random. The results were then analyzed to see if practicing the words improved the subject’s recall for those words in the past. Bem found that they did, with the largest effect size of any of the 9 studies.


Posted in: Neuroscience/Mental Health, Science and Medicine

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The “central dogma” of alternative/complementary/integrative medicine

There is something in molecular biology and genetics known as the “central dogma.” I must admit, I’ve always hated the use of the word “dogma” associated with science, but no less a luminary than Francis Crick first stated it in 1958, and it has been restated over the years in various ways. Perhaps my favorite version of the central dogma was succinctly stated by Marshall Nirenberg, who said, “DNA makes RNA makes protein,” which about sums up all of molecular biology in five words. Or at least it did until the last ten or twenty years, when we’ve been finding exceptions to this dogma.

I don’t want to dwell on the central dogma. As I’ve said, I loathe the use of the term “dogma” to describe anything in science, although a discussion of the central dogma and its exceptions might make for a decent post one day. What brought the central dogma to mind is a series of articles I saw recently in ONCOLOGY: Perspectives on Best Practices that let me to ponder the question: What is the “central dogma” of “alternative medicine”? I realize that alt-med is an unwieldy gmish of ideas that range from the semi-plausible but unproven to the completely ridiculous (i.e., homeopathy or reiki), but after reading these articles and thinking about it, I do believe that there is in actuality a “central dogma” of alternative medicine. I also believe that it is entirely appropriate to call it a “dogma” in this situation, because it is far more a matter of faith than it is of science. Moreover, the more that quackademic medicine infiltrates academic medicine, the more this “central dogma” has infiltrated academic medicine with it. Indeed, as you will see, when this central dogma is questioned, even by someone sympathetic to “complementary and alternative medicine” (CAM; i.e., “complementing” medicine with quackery) or “integrative medicine” (i.e., the “integration” of pseudoscientific medicine with medicine).

Posted in: Cancer, Neuroscience/Mental Health, Science and Medicine

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The Mind in Cancer: Low Quality Evidence from a High-Impact Journal

My science writing covers diverse topics but increasingly concerns two intertwined themes in cancer and psychology. First, I bring evidence to bear against an exaggerated role for psychological factors in cancer, as well as against claims that the cancer experience is a mental health issue for which many patients require specialty mental health interventions. Second, I explore unnoticed social and organizational influences and publishing practices, which limit evaluation of the best evidence for theories and practices claiming to be evidence based, especially those recommended (and even mandated) by professional organizations and accrediting bodies.

I benefit from a great set of international collaborators, and my colleagues and I have repeatedly  debunked claims that psychological interventions increase the survival time of cancer patients by improving their immune systems. Wally Sampson and Bernie Fox provided important inspiration for these efforts. A key source of such claims is the classic Lancet study by David Spiegel, which I will dissect in a later post for (for now, see our published critique of Spiegel).

Posted in: Cancer, Neuroscience/Mental Health, Science and the Media

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The perils and pitfalls of “patient-driven” clinical research

Dying of cancer can be a horrible way to go, but as a cancer specialist I sometimes forget that there are diseases that are equally, if not more, horrible. One that always comes to mind is amyotropic lateral sclerosis (ALS), more commonly known as Lou Gehrig’s disease. It is a motor neuron disease whose clinical course is characterized by progressive weakness, muscle atrophy and spasticity, with ultimate progression to respiratory muscles leading to difficulty breathing and speaking (dysarthria) and to the muscles controlling swallowing. The rate of clinical course is variable, often beginning with muscle twitching in an arm or a leg or slurring of speech. Ultimately, however, ALS progresses to the loss of ability to move, speak, eat, or breathe. The most common cause of death is from respiratory failure, usually within three to five years after diagnosis, although there is the occasional outlier with a less malignant form of the disease with a slower course of progression who can live a long time, such as Steven Hawking.

In other words, ALS is a lot like cancer in some ways. It is a progressive, fatal disease that usually kills within a few years at most. On the other hand, it is different from cancer in that, at least for many cancers we actually do have effective treatments that prolong life, in some cases indefinitely. In contrast the most effective treatment we currently have for ALS is a drug (riluzole) that is not particularly effective—it prolongs life by months—and can be best described as better than nothing, but not by a whole lot. So it is not surprising that ALS patients, like cancer patients, become desperate and willing to try anything. This is completely understandable, but sometimes this desperation leads to activities that are far more likely to do harm than good. I was reminded of this when I came across a post in the antivaccine propaganda blog, Age of Autism, referring to an article in The Scientist entitled Medical Mavericks. The fortuitous posting of this story, which was apparently designed to try to show that it’s not as crazy as critics have said to be treating autistic children with “Miracle Mineral Solution” (MMS) (which is a bleach) given that the introduction explicitly mentioned Kerri Rivera and the patient described in the article used sodium chlorite to treat his ALS, provided me the opening to discuss a group whose existence and advocacy brings up a complex tangle of issues that boil down to questions of how far patient autonomy should be allowed to go. I’m referring to a company, PatientsLikeMe, which describes itself thusly:

Posted in: Cancer, Clinical Trials, Neuroscience/Mental Health

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Steve Novella vs. Julian Whitaker on vaccines at FreedomFest

Steve Novella vs. Julian Whitaker on vaccines at FreedomFest

I’ve just returned from TAM, along with Steve Novella and Harriet Hall. While there, we joined up with Rachael Dunlop to do what has become a yearly feature of TAM, the Science-Based Medicine workshop, as well as a panel discussion on one of our favorite subjects, “integrative” medicine. Between it all, I did the usual TAM thing, meeting up with old friends, taking in some talks, and, of course, spending the evenings imbibing more alcohol than I probably should have so that I could look and feel my best for our morning sessions, particularly given my difficulty adapting to the time change. One thing I did was completely unexpected, something I learned about the night before our workshop when I happened to run into Evan Bernstein. He informed me of something that our fearless leader Steve Novella was going to do the next day right after our workshop. In a nutshell, Evan told me that Steve was going to debate an antivaccinationist. Evan didn’t know any details other than that Michael Shermer had arranged it and that Steve had been tapped at the last minute. Evan didn’t even know who the antivaccinationist was going to be or what the event was. Naturally, I was intrigued.

So, the next morning I asked Steve about it. I turns out that the event was FreedomFest, a right-wing/Libertarian confab that happened to be going on at the same time as TAM up the road a piece on the Strip at Bally’s. Steve didn’t know who the antivaccinationist was going to be either, which made me marvel at him. I don’t know that I’d have the confidence agree to walk into the lion’s den with less than a day’s notice not even knowing who my opponent is. Steve was more than happy to invite me along. Clearly, this was was an opportunity that I couldn’t resist. So we met up with Michael Shermer, and it was from him that I learned that Steve’s opponent was to be Dr. Julian Whitaker.

My eyes lit up.

Posted in: Neuroscience/Mental Health, Politics and Regulation, Vaccines

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Liberation Procedure for Multiple Sclerosis

It has been very instructive, from a science-based medicine perspective, to watch the story of alleged chronic cerebrospinal venous insufficiency (CCSVI) and multiple sclerosis (MS) unfold over the last three years. In 2009 Dr. Paolo Zamboni, an Italian vascular surgeon, published a paper in which he claimed that 100% of MS patients he investigated showed signs of blockage in the veins that drain blood from the brain, a condition he named CCSVI. This paper sparked immediate controversy. This controversy has been in the news again recently with the making public of the results of an observational study of the liberation procedure to treat CCSVI.

Existing research over the last half century strongly indicate that MS is primarily a disease of immune dysfunction (an autoimmune disease), resulting in inflammation in the brain that causes damage, specifically to the myelin, the insulation around  nerve fibers that allows them to conduct signals efficiently.  Zamboni is suggesting that MS is primarily a vascular disease causing back pressure on the veins in the brain and iron deposition which secondarily results in inflammation. This would be a significant paradigm shift in MS. It would also not be the first time such a dramatic shift in MS science has been proposed but failed in replication.

The MS community did not give much credence to the notion of CCSVI, but despite this there has been an incredible amount of research on the idea over the last three years (a PubMed search on “CCSVI” gives 103 results). Most of the research has simply attempted to replicate Zamboni’s findings, with mixed but generally unimpressive results. No one has found the 100% results that Zamboni originally reported. The studies have found a range of venous insufficiency in MS patients, down to 0%, but many finding results in the range of 20-40%. However, patients with other neurological disease and healthy controls have also been found to have similar rates of venous insufficiency. Some studies have found a positive correlation with MS, others have not.


Posted in: Neuroscience/Mental Health

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Luc Montagnier and the Nobel Disease

Few awards in anything have the cachet and respect the Nobel Prizes in various disciplines possess. In my specialty, medicine, the Nobel Prize in Physiology or Medicine is quite properly viewed as the height of achievement. In terms of prestige, particularly in the world of science, the Nobel Prize is without peer. To win the Nobel Prize in Medicine or another scientific field, a scientist must have made a discovery considered fundamentally important to the point that it changes the way we think about one aspect of science or medicine. Winning the Nobel Prize in a scientific field instantly elevates a scientist from whatever he or she was before to the upper echelons of world science.

So how, one might ask, is it that seemingly so frequently Nobel Laureates embrace crankery or pseudoscience in their later years? They call it the Nobel Disease, and, indeed, it’s a term listed in the Skeptics’ Dictionary (where the term is attributed to me based on this post about Linus Pauling from four years ago, but I can’t claim credit for coining the term; it existed before I wrote that post) and Rational Wiki, complete with examples. What inspired me to take on this topic, dusting off some old knowledge and writings, is that we apparently have a new victim of the Nobel Disease. Well, perhaps “new” is not the right word, but he is the most recent example. I’m referring to Luc Montagnier, who with Françoise Barré-Sinoussi was awarded the Nobel Prize in Medicine for the discovery of HIV in 2008.

Unfortunately, it didn’t take Montagnier very long to devolve into crankery. Until 2009, to be precise. Since then, Montagnier has embraced concepts like DNA teleportation and ideas very much like homeopathy. And then, just last month, his journey to the dark side was complete. Yes, Luc Montagnier presented at the yearly quackfest I discussed last week, the one in which there was much enthusiasm among the attendees for a treatment that involves administering bleach enemas to autistic children. He presented at Autism One, a coup that caused much rejoicing in the antivaccine movement.


Posted in: Cancer, Neuroscience/Mental Health, Science and the Media, Vaccines

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Bleaching away what ails you

I’ve been at this blogging thing for over seven years, over four of which I’ve been honored to be a part of this particular group blog dedicated to promoting science as a basis for rational medical therapies. For three or four years before that seven year period began, I had honed my chops on Usenet in a group known as (m.h.a.). So, although I haven’t been at this as long as Steve Novella, I’ve been at it plenty long, which led me to think I had seen just about everything when it comes to pseudoscience and quackery.

As usual whenever I think I’ve seen it all, I was wrong.

I’m referring to something that has been mentioned once before on this blog, namely something called “Miracle Mineral Solution” (MMS). I must admit that after a brief reaction of “WTF?” I basically forgot about it. I shouldn’t have; I should have looked into it in more detail at the time. Fortunately, being a blogger means never having to say you’re sorry (at least about not having caught a form of quackery the first time it made big news), and fortunately MMS was brought to my attention in the context of an area of quackery that I frequently blog about. You’ll see what I mean in a minute.

What happened is that MMS was brought to my attention again by a couple of readers and, not remembering it other than vaguely, I did what I always do when confronted with these situations. I Googled, and I found what I needed to know. Basically, MMS is 28% sodium chlorite in distilled water. In essence, MMS is equivalent to industrial strength bleach. Proponents recommend diluting MMS in either water or a food acid, such as lemon juice, which results in the formation of chlorine dioxide.

Posted in: Health Fraud, Neuroscience/Mental Health, Vaccines

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Hypnotherapy For Pain and Other Conditions

Hypnotherapy is the use of hypnosis as a medical intervention, usually for the treatment of pain and other subjective symptoms. It remains controversial, primarily because the evidence for its efficacy is not yet compelling, but also because it is poorly understood. This situation is not helped by the fact that it is often characterized as an “alternative” therapy, a label that can “ghettoize” an otherwise legitimate treatment modality.

What Is Hypnosis?

Any meaningful discussion of hypnosis, or any other phenomenon, needs to start with a specific, and hopefully operational, definition.  If we cannot define hypnosis then it becomes impossible to meaningfully discuss it. The problem of definition plagues the science dealing with many so-called alternative therapies, such as acupuncture.  Good science requires controlling for specific variables, so that we can determine which variables are having what effects. If we don’t know which variables are part of the operational definition of a specific therapy, then we cannot conduct proper studies or interpret their results.

For example, with acupuncture, in my opinion the only meaningful definition of this procedure is the placing of thin needles into specific acupuncture points in order to elicit a specific response. Research has shown, however, that acupuncture points do not exist, that placing needles at specific points is not associated with a specific outcome, and even that sticking needles through the skin (as opposed to just poking the skin superficially) does not correlate with outcome. When these variables are isolated they do not appear to contribute anything to efficacy, therefore one might conclude that acupuncture does not work. Research into acupuncture, however, often does not adequately isolate these variables from the therapeutic ritual that surrounds acupuncture, or even mixes in other modalities, such as electrical stimulation.


Posted in: Neuroscience/Mental Health

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Autism prevalence: Now estimated to be one in 88, and the antivaccine movement goes wild

Editor’s Note: Some of you might have seen this before, but it’s an important (and timely) enough topic that I figure it’s worth exposing to a different audience. It’s been updated and edited to style for SBM. Enjoy.

If there’s one thing that I’ve learned that I can always—and I do mean always—rely on from the antivaccine movement, it’s that its members will always be all over any new study regarding vaccines and/or autism in an effort to preemptively put their pseudoscientific spin on the results. It’s much the same way that they frequently storm into discussion threads after stories and posts about vaccines and autism like the proverbial flying monkeys, dropping their antivaccine poo hither and yon all over science-based discussions.

In any case, antivaxers are also known for not respecting embargoes. They infiltrate their way into mailing lists for journalists in which newsworthy new studies are released to the press before they actually see print and then flood their propaganda websites with their spin on the studies, either attacking the ones they don’t like or trying to imprint their interpretation on ones on which they can, all before the skeptical blogosophere—or even the mainstream press—has a chance to report. So it was late last week, when vaccine-autism cranks jumped the embargo on a CDC study that announced new autism prevalence numbers. This is nothing new; it’s the antivaccine movement’s modus operandi, which makes me wonder why the various journals don’t shut off the flow. The study, of course, was announced in press conferences and a number of news stories. No doubt by now many of you have seen them. The stories I’ve seen thus far have focused on the key finding of the CDC study, which is that the prevalence of autism in the U.S. has risen to approximately 1 in 88, a finding reported in the CDC’s Morbidity and Mortality Weekly Report.

This is how the CDC came up with the new prevalence:

Posted in: Neuroscience/Mental Health, Public Health, Science and the Media, Vaccines

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