Monthly Archives: September 2008

Marcus on Kluge

Here’s Gary Marcus discussing his book, Kluge: The Haphazard Construction of the Human Mind.

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Filed under About Belief, About Neuroscience, About Perception, Videos

Which Face Would You Trust?

 

Excellent piece at The Situationist about how adaptive instincts bias our decisions to trust based on first impressions. Most of the research in this area has revolved around “trust games” like the Prisoner’s Dilemma where participants are faced with decisions to choose one option over another given certain conditions. But recently Alexander Todorov in the psychology department at Princeton used a different methodology that gets more at how trust is given, or not, in actual social situations.  The research suggests that, as far as first impressions go, we’re often a victim of our instincts. From the article:

In a paper published in June, they suggested that our unconscious bias is a byproduct of more adaptive instincts: the features that make a face strike us as trustworthy, if exaggerated, make a face look happy – with arching inner eyebrows and upturned mouths – and an exaggerated “untrustworthy” face looks angry – with a furrowed brow and frown. In this argument, people with “trustworthy” faces simply have, by the luck of the genetic draw, faces that look a little more cheerful to us.

Just as in other cognitive shorthands, we make these judgments quickly and unconsciously — and as a result, Oosterhof and Todorov point out, we can severely and immediately misjudge people. In reality, of course, cheekbone shape and eyebrow arc have no relationship with honesty.

 More on this can be found in a recent Boston Globe article, Confidence Game.

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Filed under About Perception

What are the Chances?

Scientific American has a nice piece by Michael Shermer on why our brains have difficulty grasping far reaching probabilities.   Every time you pick up the phone to call someone and they just happen to be trying to call you at the same time, you’ve witnessed a minor miracle — if by minor miracle we mean something occuring that is improbable – though quite statistically possible. If you have a dream that someone is going to die, and not long after, they do, then you might be tempted to conclude that you’ve witnessed something tragically incredible – but again, though improbable, this event is also statistically possible. From the article:

The average person has about five dreams a night, or 1,825 dreams a year. If we remember only a tenth of our dreams, then we recall 182.5 dreams a year. There are 300 million Americans, who thus produce 54.7 billion remembered dreams a year. Sociologists tell us that each of us knows about 150 people fairly well, thus producing a social-network grid of 45 billion personal relationship connections. With an annual death rate of 2.4 million Americans, it is inevitable that some of those 54.7 billion remembered dreams will be about some of these 2.4 million deaths among the 300 million Americans and their 45 billion relationship connections. In fact, it would be a miracle if some death premonition dreams did not happen to come true!

How much easier it would be to blow holes through new age shibboleths if we could grasp the understanding that, statistically, every alleged act of clairvoyance, ESP, astrological prediction, etc can be explained without relying on supernatural reasoning. Imagine, if this triumph of the mundane came to be, how many fragile sensibilities would be shattered, how many books would not be sold, and charlatans would not be successful in hoodwinking mystified audiences.  But really, what are the chances of that?

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Filed under About Belief

The Candidates on Science

If you’re interested to know how candidates McCain and Obama come down on major scientific issues, the Scientists & Engineers for America have posted a point-for-point comparison here. Well worth the time.

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