The mother of all "in other news" posts

More like this

Gender and racial differences in standardized test scores have received a lot of coverage in the popular press. An article in yesterday's New York Times discussed how simply combining populations with different economic status can result in increased test scores—apparently just being around kids…
In the recent articles, blog posts, and comment threads about possible biological reasons for the continued gender disparity in tenured math and science faculty positions, the discussion seems to be divided between two groups: those who emphasize the social and cultural aspects involved in gender…
By now you've probably heard about the Dar-Nimrod and Heine study on stereotype threat and math performance in women. If you're interested in learning more about that study, check out Hugo's post at Alpha Psy. Since Hugo did such a nice job describing the study, and since I'm lazy, I'm not going to…
I just finished reading Jonah Lehrer's book Proust was a Neuroscientist. Quick review: good book, very fun read, and I'm happy to recommend it to almost everyone. I just have one small quibble. For the quibble to make any sense, you need to know something about my teaching. Students in all my…

The probabilities in that article on blinking in group photos aren't right. Using their numbers, the probability of anyone blinking at any one time is 250ms/10000ms, or .025. If you need them not to blink during the time the shutter is open, add that time to the smaller interval. Subtract from 1 and exponentiate by the number of people. The real formulas for a 95% chance of not getting a blink suggest you divide the number of people by 5 if you're using a flash (1ms exposure), or by 2 or 3 if you're taking photos in relatively dim light. The take-home is the same, but the way they calculated it was bizarre.