A face for politics: New study shows we can tell Democrats from Republicans in head shots

By Katie Moisse
Scientific American

You can tell a lot about a person by their face—even their political affiliation, new research claims.

In a study published in the January 18 issue of PLoS One, subjects were able to accurately identify candidates from the 2004 and 2006 U.S. Senate elections as either Democrats or Republicans based on black-and-white photos of their faces. And subjects were even able to correctly identify college students as belonging to Democratic or Republican clubs based on their yearbook photos.

To investigate the basis of these judgments, subjects were asked to rate photos of faces on a seven-point scale assessing personality traits such as assertiveness, maturity, likeability and trustworthiness. Subjects consistently associated Democrats with warmth (likeable and trustworthy) and Republicans with power (dominant and mature). These findings were independent of the gender of the person in the photo.

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