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Fingering the Answers

Discover how finger length and personality traits can hint at aggressive behavior and prenatal testosterone exposure. Explore the research!

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Personality traits digitized

Don’t judge a man by his handshake; look at his fingers instead. Psychologist Peter Hurd of the University of Alberta in Canada compared the second and fourth fingers, that is, the index and ring fingers, of 300 university students and found males with the longest ring fingers were most likely to get in fights.

“A longer ring-to-index finger ratio has been correlated with higher levels of prenatal testosterone exposure,” says Hurd. Previous studies suggest that men with longer ring fingers are better when it comes to sports and have especially developed male-pattern visuospatial skills.

“We originally started this study just to have fun,” says Hurd, who is now looking at the fingers and penalty records of professional hockey players to see if they confirm his results. But assessing a potential mate by his fingers would be premature. “Finger length explains only 5 percent of the variation in ...

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