A note on "Science Blogs"

Some of you have probably read the recent article about “Science Blogs” in The New York Times. I announced that I was starting a sister blog to this weblog about a week ago. A few points of note:

1) There will be many posts that you can find there that you won’t find here. Though the content and linking will intersect, there will be a great deal of material exclusive to either weblog (this is a group weblog, the other one is not, so that should be obvious)..

2) With that in mind, I would ask that you:

  • Add the other blog’s RSS feed.
  • Or, bookmark it.
  • Or read it regularly

3) If you are a weblogger, I would appreciate it if you would add a link to that weblog as well as this one, as John Hawks did.

As I said a few weeks ago, I don’t know where this is all going, so I will update you if I receive a vision from God as to how to differentiate the two weblogs more clearly. Right now there just hasn’t been much lineage sorting. And if you care about that sort of thing, I suspect I will be posting much more on both weblogs in the near future for a bit.

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Evolution, religion and psychology

As some of you might know, Intelligent Design and evolution are becoming issues in Utah. Before we move on, this from Ron Numbers The Creationists might be instructive:

…in 1935 only 36 percent of the students at the Mormons’ Brigham Young University denied that human beings have been “created in a process of evolution from lower life forms.” By 1973 the figure had risen sharply to 81 percent….

What’s going on here? First, you have to know that the Mormon Church has taken different views in regards to evolution and there isn’t a strict stance on the issue. This article in Deseret News makes the diversity clear. For one prominent Mormon perspective, see Orscon Scott Card’s recent essay (I won’t try to rebut and respond to his meanderings). But in light of the recent Vactican restatement supporting1 evolutionary theory what’s going on in regards in this tango between Darwin and God?

In regards to the Mormon numbers one hypothesis that I think is plausible is that the shift in BYU students’ perceptions of the theory of evolution is a function of Mormons tracking the conservative Christian subculture in the United States. Though Mormons lay outside conventional Christianity in terms of theological orthodoxy, their mores and non-theological beliefs have tended to be aligned with the conservative end of the sociocultural spectrum, and so they have absorbed a concomitant dose of Creationism from the zeitgeist.2

Recently I read several entries of interest from The Oxford Companion to the Bible and I noted that only a faction of Protestants adhere to a literalist stance in regards to the text of scripture. This is reflected in the historical literature where Roman Catholic apologists argued against Reformation literalists during the debates the 16th century. But the the variance in belief is rather high in Protestantism, so just as there are fundamentalists, there are also groups like Congregationalists (in the United States) who are apt to take an even more allegorical tack on the scripture than Roman Catholics. In any case, the key point is that defenders of the viability of evolutionary theory are empirically correct when they commonly assert that most Christian denominations have no problem with accommodating descent with modification and an old earth. And yet half of the American public has rejected evolutionary theory in all its forms for decades, and there is often a tacit assumption that “genuine” Christianity necessarily rejects evolutionary theory.

Even though Roman Catholics tend to be far cooler to Creationist and quasi-Creationist narratives than Protestants in the United States, a substantial minority still adhere to a Creationist model.3 As a young adult I actually entered in conversations with many individuals who professed Roman Catholicism and Creationism, and here are the flavors I encountered:

  • A subset asserted that Creationism was a necessary implication of their religious beliefs, and some averred that it was Church teaching.
  • A subset didn’t know what the Church taught about evolution (if it taught anything at all) and simply expressed their intuition that “Creation made sense.”

The first position was easy to rebut in light of the statements on evolution going back to the 1950s by the Pope. Even in the pre-internet era they weren’t hard for me to reference and point too. If the individuals in question did do the follow up reference check they were discomfited but would usually reluctantly switch their position, and least assume a more agnostic stance. This suggests to me that a proportion of the deviation from the American norm by Roman Catholics in regards to belief in evolution is a function of Church teaching, and perhaps even the imprimatur of religious respectibility given to it when it is taught in parochial schools. But where did these individuals get the idea that the Church taught something it didn’t? I think the answer likes in the interface between psychology and culture. In Searching for Memory psychologist Daniel Schacter recounts how people often do not model the past appropriately in regards to the beliefs they claim to have held, e.g. southerners whose views on racial issues were surveyed in both 1970 and 1984 had changed a great deal. But, when asked what their views were in 1970 in 1984, the individuals simply asserted that they’d held the same views as they had in 1984 even though the researchers could see that they hadn’t (they’d recorded their answers). This isn’t a function of pathological deception, memory reshapes itself. Similarly, in hindsight I am now no longer sure that the Roman Catholics who claimed they Church taught that Creationism was valid were stupid or lying to me. The town I grew up in was very conservative and there were many evangelical and fundamentalist churches. My hunch is that these individuals somehow encountered literature and tracts from these churches and conflated them in their minds with Roman Catholic doctrine as it was normative in that small town for religious people to reject evolutionary theory.

As for the second subset, they rarely, if ever, followed up my references because these beliefs weren’t a major part of their worldview, and they weren’t even very religious people. Just as the first group absorbed particular biases and assumptions from their milieu I believe something similar happened here too. But at this point, we have to move beyond culture, as many of these individuals weren’t the types to need to conform to the conservative religious subculture. Why were they Creationists, or at least tepid ones? I suspect the answer lay in psychology, the default model of the world that our brains come preloaded with tends to be strongly biased toward Creationism of a sort. Creationism just “makes sense,” just like astrology and holistic medicine, it is not embedded in an arcane social model and a esoteric system of abstraction which is removed from human experience and common sense.

Which brings me back to the Mormons. Often people have a perception that culture is an all-powerful force in reshaping how you view the world, but I think that this is fallacious, the mind has biases and structural impediments to paradigm perception. Sometimes, as in the God concepts, people simply square the circle of contradiction between culture and psychology by operating on two levels, the conscious-verbal-reflective and the reflexive subconscious level of intuitive mental representation. Certainly the tendency of Mormons to sympathize with the social priorities of conservative Protestants, and their free exchange with that subculture (at least from their perspective, for example they lionize conservative Anglican C.S. Lewis), is a plausible explanation for why they would be biased toward accepting Creationist accounts even if their Church never made an explicit push in this direction. But I think the psychology is important as well, not only were
the cultural variables aligned, the psychological system was already loaded and ready to go. A given psychology may not be a sufficient condition for a particular set of beliefs, but they are often a necessary condition.

This of course moves me to to question of why are there international variations in acceptance of evolutionary theory if Creationist accounts are intuitive? Let me remind you that children raised in non-Creationist households still tend to prefer Creationist explanations when young, so something happens later in life. Culture obviously does matter in this regard, but, I think it matters in the way that many form explicit “beliefs” about God. The vast majority of the world’s Christians accept the Athanasian Creed, and can express a relatively cogent belief in a Trinitarian God, but they can not truly conceive of intuitively in a Trintarian God, it is a verbal token and affirmation. And so I think a similar process is at work in evolutionary theory, the vast majority of people, and this even includes most biologists I suspect, are making a verbal affirmation of a concept that they don’t intuitively understand. The fact is, even if you have reasonable fluency with The Genetical Theory of Natural Selection, which at least offers a precise and analytic theoretical framework, I am skeptical that you (and I of course) truly conceive of the timescales required for much of evolution to work its “magic” in the same way we can imagine last year, last decade, or even last century. We have to have faith in the scientific system, and trust the theories and data which are one or many removes from our intuitional preconceptions.

Of course, most people have a weak grasp of Newtonian physics, and they don’t go around rejecting it. So cultural dynamics are important, my overall point is simply that neglect of psychological substrate allows you to miss the totality of the system. It isn’t that many Americans accept a model because they are stupid, it is that they refuse to move beyond their default assumptions or at least give a tacit nod to elite-specialist knowledge.

1 – Or at least the perception, again, I think that these releases need to be understood in the context of a Thomistic worldview, but that gets left out.

2 – Though the academic expositers of Intelligent Design disavow Creationism in its crass form, my impression from conversation and the literature is that the populist support for Intelligent Design is actually just a proxy support for Creationism. This was on display in the Dover case.

3 – This is not heresy obviously, as in many ways evolutionary theory is orthogonal to Roman Catholic points of faith and doctrine.

Nature, culture & the revival of the naturalistic paradigm

In the interview below with anthropologist Dan Sperber I allude to the “naturalistic paradigm” in anthropology. What does this mean? Sperber, along with Scott Atran, Pascal Boyer and Laurence Hirschfield are anthropologists who treat culture as an outgrowth of a natural and reducible process mediated by the human mind. Sperber often speaks of the “epidemiology of representations.” He examines the dynamics which constrain the transmission of cognitive representations within and between cultures, in short, memetics with an awareness of the limits and biases of the mind as elucidated by cognitive psychology.
The difference between the naturalistic paradigm and the standard social science model employed within cultural anthropology today is detailed very well in the short book Theological Incorrectness, by Jason D. Slone. Slone’s book is an elaboration on his doctoral thesis, where he argued that people often represent ideas about god(s) in their minds which are at sharp variance with their professed creeds. Despite the putatively narrow focus of Slone’s work the first third is an incisive critique of the standard anthropological program which is emphasizes “thick description” and “local pecularities” at the expense of general assertions and insights about human behavior. As Scott Atran notes, the problem with the localized model which emphasizes culturally based differences and mutual unintelligibility because of the lack of common references is that the very act of perception of difference indicates that those outside the culture can intuit the general character of that culture without being of that culture. In other words, the very act of going beyond assertion to argument implies knowledge and understanding which is denied by the argument!
The school of naturalistic anthropology deviates from this self-refutation and takes a step back from the continuous process of critique as it attempts to synthesize the findings of cognitive psychology, anthropology and evolutionary psychology. It assumes that humans have universal cognitive modalities which are constrained and canalized by biological points of departure. Our capacity for abstraction and system building is buffered by the nature of our intuitions about the world around us, and the semantic distinctions we make often have more to do with coalition building than a genuine difference of ontologies.
In short, while some would assert that the seminal function to analyze is:
Culture(input) = behavior
The naturalistical model might assert that the central dynamic of study is:
Mind(input) = culture
In other words, cultural is a function of the inputs into the human mind, as opposed to mind being conditioned by cultural filters.

Omega-3 affects IQ and behavior

Another research group is reporting a correlation between consumption of omega-3 PUFAs during pregnancy and the IQ of children.

Looking at the effects of omega-3 intake on 9,000 mothers and their children, the team found mothers with the lowest intake of the essential fatty acid had children with a verbal IQ six points lower than the average.

A new finding, as far as I know, is that low omega-3 intake is also correlated with antisocial behavior:

Low intake of the crucial fatty acid also appeared to lead to more problems of social interactions – such as an inability to make friends. Research leader Dr Joseph Hibbeln said “frightening data” showed 14% of 17-year-olds whose mother had eaten small quantities of Omega -3 during pregnancy demonstrated this sort of behaviour. This compared with 8% of those born to the group with the highest intake, he said.

I note and so does the economist that this study is looking at correlation, and so the possibility of confounding is a problem. In particular, I can easily imaging that omega-3 intake is correlated with maternal IQ, and thus some or all of the omega-3 intake to IQ correlation could be mediated by genetic transmission of IQ. However, I do know of one supplementation study with good internal controls.

Update: BBC News story

10 questions from Razib

Over at my other weblog I have been doing a “10 questions” series. Here are the ones I’ve done so far:
John Derbyshire of National Review and author of Prime Obsession
Armand Leroi of Imperial College and author of Mutants
Warren Treadgold of Saint Louis University and author of A History of Byzantine State and Society
Dan Sperber of Institut Jen Nicod and author of Explaining Culture
Ken Miller of Brown University and author of Finding Darwin’s God

The gifts of the Trinity

We are all aware of Darwin, but the men who were instrumental in the rise of the Modern Synthesis and the banishment of the Eclipse of Darwinism are not figures who loom large in the public imagination. In the domain of population genetics they would be R.A Fisher, J.B.S. Haldane and Sewall Wright. R.A. Fisher’s daughter wrote a good biography that chronicles his private and public life, Life of a Scientist. Statistically oriented people will be particularly interested his conflict with Jerzy Neyman. Will Provine’s Sewall Wright and Evolutionary Biology is probably the most multidimensional single volume tome you could stumble upon which still remains accessible. Like the Holy Ghost J.B.S. Haldane is someone who I haven’t really been able to put a fix on as easily, but his Causes of Evolution was worth the read (I haven’t read any biographies, but Marek Kohn’s A Reason for Everything spends a great deal of time on him). You can find many of the papers of R.A. Fisher at the digital archive maintained by the University of Adelaide. His Genetical Theory is a pithy, if somewhat technically opaque, exposition on his outlook on evolutionary biology. Wright’s Evolution and Genetics of Populations is more verbose, as befits a less abstract and more empirical thinker.
Let me finish with a quote from The Genetic Basis of Evolutionary Change by Richard Lewontin:

For many years population genetics was an immensely rich and powerful theory with virtually no suitable facts on which to operate. It was like a complex and exquisite machine, designed to process a raw material that one had succeeded in mining. Occasionally some unusually clever or lucky prospecter would come upon a natural outcrop of high-grade ore, and part of the machinery would be started up to prove to its backers that it really would work. But for the most part the machine was left to the engineers, forever tinkering, forever making improvements, in anticipation of the day when it would be called upon to carry out full production….

Lewontin was writing in the wake of his discovery that polymorphism levels were far higher than either the Fisherian “Classical School” or the Wrightian “Balance School” would have predicted. This spurred on the development of Neutral Theory, which holds that most substitutions of one allele for another on a locus are due to randon genetic drift operating upon mutations which do not exhibit negative or positive fitness deviations from the population mean. Today the rise of computation and incredibly powerful assaying techniques are starting to provide a great deal of raw material for the abstract analytic theoretical engine to sieve through. Hallelujah!