Neuroanthropology

For a greater understanding of the encultured brain and body…

Archive for April, 2008

Wednesday Round Up #9

Posted by dlende on April 30, 2008

Tit-for-Tat, Game Theory and the Like

Michael Shermer, The Doping Dilemma
The rationality of doping—through game theory

Jim Rilling et al., The Neural Correlates of the Affective Response to Unreciprocated Cooperation
Anterior insula, left hippocampus, and left lingual gyrus light up when you are getting screwed (pdf)

Jim Rilling et al., A Neural Basis for Social Cooperation
Cooperating in the Prisoner’s Dilemma game lights up the reward centers! (pdf)

Jake Young, The Ruthlessness ‘Gene’ –or- Four Caveats in Interpreting Behavioral Genetics Studies
The Dictator Game, genes and mechanism, and media sensationalism

Ken Binmore, Review of Axelrod’s The Complexity of Cooperation
The tit-for-tat strategy is over-rated

Wendy Grossman, New Tack Win’s Prisoner’s Dilemma
Social recognition and team play wins hands-down…

Tully, Arrow’s Impossibility Theorem
Social choice theory, ranked preferences, and the failure of individual-based theories

Research Digest Blog, How Group Cooperation Varies Between Cultures
“students from less democratic countries like Saudi Arabia, Oman and Belarus tended to punish not only free-loaders, but also cooperative players, with the result that cooperation in their groups plummeted”

Joseph Henrich et al., Costly Punishment Across Human Societies
Pdf of the 2006 Science paper on the cross-cultural propensity to punish cheaters based on ultimatum and third-party punishment games

Mark Gimein, The Eligible-Bachelor Paradox
“How economics and game theory explain the shortage of available, appealing men”—grab hold of a good one and don’t let go…

Aging: Evolution and More

Neuroscientifically Challenged, Trying to Make Evolutionary Sense of Menopause
Good summary of previous debates, plus coverage of a new theory: avoiding female reproductive competition

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Posted in Decision Making, Evolution, Links | Leave a Comment »

Face recognition training and stereotyping

Posted by gregdowney on April 30, 2008

Stimuli from McKone et al. 2008Dave Munger has just put of a great post over at Cognitive Daily, one of the sites I read pretty religiously: With a little training, we can recognize other races as well as our own. Dave discusses a recent article in Perception by a team led by Elinor McKone in which subjects were trained to recognize faces from ethnic groups other than their own and then subjected to very difficult recognition tasks. Turns out that people can get pretty good at this task, which many of us don’t do very well if we’re not ‘trained.’

I’m not going to go over the same turf that Munger does (not least of all because I won’t do it as well as he does), but I will copy his conclusion:

In other words, memory for different-race faces can be trained to work in the same way it does for same-race faces, even in a difficult peripheral-vision test, in a relatively short period of time. It doesn’t take years of immersion in a foreign culture, just an hour or so studying pictures (albeit hundreds and hundreds of them!).

This suggests that humans have a general pattern for recognizing faces that is adaptable even to unfamiliar faces. McKone et al. argue that we recognize same-race faces holistically, instead of feature by feature. Initially when we see a different-race face, we attempt to remember it using individual features, much the same we remember a animal or other object. But after some training, we learn to recognize even different-race faces holistically, which can be more accurate, but which doesn’t work as well when faces are upside-down.

Briefly, the research runs against the tendency to see the psychological or neural effects of social conditioning (like living in socially segregated environments) as the cause of social conditions. That is, there’s a tendency to want to argue that humans are innately racist, sexist, biased, hostile to those different, hierarchical, or whatever…. This kind of research tends to be essentialist and usually appeals to some sort of ‘genetic programming,’ but typically with no genetic evidence or even a plausible account of this social attitude might emerge from the genes, neural chemistry or any other biological mechanism.

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Posted in Uncategorized | 1 Comment »

Grand Theft Auto: Liberty City

Posted by dlende on April 29, 2008

Grand Theft Auto IV comes out tomorrow. Looks like it might be the best in the series, certainly one of the best games of the year. The early reviews gathered at Metacritic have an average score of 99 out of 100 as I write this. Rockstar Games, the gaming company that has made Grand Theft Auto, estimates a pre-order demand around $400 million. So it’s big. Huge.

But why?

I will make a simple argument. It is the combination of creative anthropology, sophisticated game design and game play, and the right brain hooks that makes video games like Grand Theft Auto work so well.

And the reviews show it. In the rest of the piece, I will draw excerpts from three places, the IGN review, the New York Times review, and the highlight quotes from Metacritic.

Creative Anthropology

Take creative fiction, and add world-building and a do-it-yourself story, and then you have what I mean by creative anthropology. Some Geek Love through role playing and fantasy, mixed with narrative to get the cultural buy-in.

So here’s GameSpy: “The very nature of the American Dream is the central theme in Rockstar Games’ Grand Theft Auto IV, a gaming masterpiece that is a picture-perfect snapshot of the underworld of today’s big cities.”

The New York Times gushes, “The real star of the game is the city itself. It looks like New York. It sounds like New York. It feels like New York. Liberty City has been so meticulously created it almost even smells like New York.”

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Posted in Cultural theory, Play, Psychological anthropology | 6 Comments »

Review of Marcus’ ‘Kluge’

Posted by gregdowney on April 29, 2008

There’s a short review of Gary Marcus’ new book, Kluge: The Haphazard Construction of the Human Mind, on The New York Times website. The review, ‘Patch Job’ by Annie Murphy Paul, argues that the book is a good central idea that doesn’t have enough development to carry the weight of every chapter.

Marcus, it seems, has a problem: an appealing and intriguing idea that isn’t quite as big as he claims. To solve it, he reaches for that rhetorical kluge, the straw man, setting up and then sweeping aside the notion that the human mind is infallible.

Apparently, Marcus sets up a series of straw men to knock down — human thought as perfect and infallible — to oppose the kluge (rhymes with ‘huge’) model of the human brain.

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Posted in Uncategorized | 1 Comment »

Encephalon #44: A Must Read

Posted by dlende on April 28, 2008

Cognitive Daily has the latest edition of Encephalon up, the best and brightest of the last two weeks.

This edition is a stand-out, just lots of great stuff, so please check it out! Enjoy!

Posted in Links | 8 Comments »

WordPress: Ways to Explore

Posted by dlende on April 28, 2008

WordPress has added a new feature, an automatically generated list of related posts that appears at the bottom of each post you view. This list will provide links both within this site and to other WordPress blogs, and occasionally to other blogs on other sites.

They’ve just started rolling this feature out (see the announcement here), and so far it’s mostly in-house: this blog and across WordPress. Posts like the ones on dopamine and addiction, two languages & theory of mind, and others already have links on them. Hopefully it should provide all of us a new way to network.

Of course if you are interested in the stuff on this blog, you can check out our Popular Posts page (just updated), as well as explore things through the category cloud, for example, on stress, brain mechanisms, and cultural theory. The entire category cloud appears on the left side of the main page, down past the blogroll.

Posted in Uncategorized | 1 Comment »

A softer ‘neo-Whorfianism’

Posted by gregdowney on April 27, 2008

At Neuroanthropology, we’ve had a number of posts about language and the brain (such as here, here, and here); it’s a issue of lasting importance in anthropology, linguistics, cognitive science, and psychology. There’s a really nice piece in The New York Times about it though, and for once, I just want to do a summary and reflection rather than a critique of one of their pieces. The article is When Language Can Hold the Answer by Christine Kenneally.

Daniel recently mentioned this piece in his post, A Times Trifecta, but I wanted to add a comment on it. Daniel relays the quote that the article uses to sum up the debate around the Sapir-Whorf hypothesis: ‘Does language shape what we perceive, a position associated with the late Benjamin Lee Whorf, or are our perceptions pure sensory impressions, immune to the arbitrary ways that language carves up the world?’ He’s just providing a thumbnail sketch, so he doesn’t include the next paragraph, which I think helps to elevate this article above the usual either-or, black-or-white dross that happens in public press about the role of language in thinking:

The latest research changes the framework, perhaps the language of the debate, suggesting that language clearly affects some thinking as a special device added to an ancient mental skill set. Just as adding features to a cellphone or camera can backfire, language is not always helpful. For the most part, it enhances thinking. But it can trip us up, too.

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Posted in Language | 2 Comments »

Dying Sooner: The New US Pattern

Posted by dlende on April 27, 2008

What the hell is wrong with this country? That is what came to my mind when I read a recent PLoS article “The Reversal of Fortunes: Trends in Country Mortality and Cross-County Mortality Disparities in the United States.” The basic conclusion: life expectancy is going DOWN in parts of the United States. How can that be?!

Here is what the PLoS article tells us: From 1983 to 1999, life expectancy declined significantly in 11 US counties for men and in 180 (!) counties for women. Why? “Life expectancy decline in both sexes was caused by increased mortality from lung cancer, chronic obstructive pulmonary disease, diabetes, and a range of other noncommunicable diseases, which were no longer compensated for by the decline in cardiovascular mortality [driven largely by better drugs and interventions]. Higher HIV/AIDS and homicide deaths also contributed substantially to life expectancy decline for men, but not for women.”

In their conclusions, the authors Majid Ezzati, Ari Friedman, Sandeep Kulkarni, and Christopher Murray single out some specific health problems: “The epidemiological (disease-specific) patterns of female mortality rise are consistent with the geographical patterns of, and trends in, smoking, high blood pressure, and obesity. In particular, the sex and cohort patterns of the increase in lung cancer and chronic respiratory disease mortality point to an important potential role for smoking.” So cigarettes kill.

But before we blame it all on individual behaviors, recall that these data are also geographic, by county. Where did life expectancy go down for 4% of the male population and 19% of the female population? “The majority of these counties were in the Deep South, along the Mississippi River, and in Appalachia, extending into the southern portion of the Midwest and into Texas.” In the worst performing counties, life expectancy dropped SIX years for women and two and a half years for men. In contrast, in the best US counties, life expectancy rose by as much as five years.

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Posted in Inequality, Medical anthropology | 1 Comment »

More on Brainbow

Posted by dlende on April 26, 2008

Since I posted Jeff Lichtman’s Brainbows, with all those wonderful images of the fluorescent brain, I’ve gotten questions from people about two basic things: first, how do they get those colors? and second, how do they get those images?

For the colors, genetic recombination techniques are used to insert pigment-expressing genes into the genomes of developing mice. The cool part? Those extra genes come from coral and jellyfish. The red color comes from coral, while the blue and cyan come from modifying a fluorescent green pigment in jellyfish.

For the images, the fluorescent hues only appear under fluorescent light. The Lichtman group has used two techniques, both using confocal microscopy (focused image taking, rather than a normal broad view from a typical microscope). First, brain slices are taken from mice and then examined in the lab. Second, for live shots, the Lichtman group works on the “neuromuscular junctions in a very accessible neck muscle in mice,” which permits taking a series of images over several days.

In the older post I blogged on how Lichtman’s approach to his research is reminiscent of what we try to do here—a naturalist concerned with the processes, mechanisms and connections of life and an understanding of the power of observation. But here I want to point out why these techniques are powerful. First, they permit an understanding of neuronal arrangements and connections through the greater discrimination provided by the many different colors. The image below from the original Nature article shows the differences between neuronal patterns in different parts of the brain.

Second, using computers to create 3-D videos from 2-D images, this research gives us maps that permits us stereoscopic humans to actually see fields of neurons as they are structured in the brain. This too represents a major advance over older images. So enjoy the video!

Finally, for your viewing pleasure, a composite image of brainbow pictures.

Posted in Brain imaging, Brain Mechanisms | 1 Comment »

Darwin Online

Posted by dlende on April 26, 2008

Sue Sheridan, my colleague here at Notre Dame, has a post Darwin in His Own Words on her blog, Life of Wiley. I recreate it below since both the NPR story and the online link to Darwin’s works are great.

Darwin in His Own Words
There was a very interesting piece on NPRs Morning Edition about the new Darwin Online Project. They have made all of his writings, notes, letters, etc. available for free. Including free downloads of his books. Pretty cool. Apparently the site has been swamped with hits. Take that creationists!

As the Darwin Online site says, they got 7 million hits on April 17th. Wow! It should prove to be a great resource.

The New York Times also has an article on Darwin, What Darwin Saw Out Back. It covers the new exhibition at the New York Botanical Garden recreating Darwin’s experimental and observational work with flowers.

Here’s a relevant bit:

Though most people associate that book and Darwin’s ideas generally with his voyage to the Galápagos and his study of finches there, his work with plants was far more central to his thinking, said David Kohn, a Darwin expert and science historian who is a curator of the exhibition… “He was fascinated by plants,” particularly the way their variation and sexual reproduction challenged the idea that species were stable, a key idea in botany at the time. As Dr. Kohn writes in the exhibition catalogue, “plants were the one group of organisms that he studied with most consistency and depth over the course of a long scientific career” of collecting, observing, experimenting and theorizing. But Darwin studied more than flowers. He was intrigued by what Dr. Kohn calls the “behavior” of plants — how they move, respond to light, consume insects and otherwise act in the world.

Now if they would only do an exhibition on Darwin’s impressive work on molluscs to go along with the flowering plants and the Galapagos finches.

Posted in Evolution | Leave a Comment »

 
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