At least when it comes to female politicians, perhaps you can judge a book by its cover, suggest two UCLA researchers who looked at facial features and political stances in the U.S. House of Representatives.
"Female politicians with stereotypically feminine facial features are more likely to be Republican than Democrat, and the correlation increases the more conservative the lawmaker's voting record," said lead author Colleen M. Carpinella, a UCLA graduate student in psychology.
The researchers also found the opposite to be true: Female politicians with less stereotypically feminine facial features were more likely to be Democrats, and the more liberal their voting record, the greater the distance the politician's appearance strayed from stereotypical gender norms.
In fact, the relationship is so strong that politically uninformed undergraduates were able to determine the political affiliation of the representatives with an overall accuracy rate that exceeded chance, and the accuracy of those predications increased in direct relation to the lawmaker's proximity to feminine norms.
"I suppose we could call it the 'Michele Bachmann effect,'" said Kerri Johnson, the study's senior author and an assistant professor of communication studies and psychology at UCLA.
The findings are forthcoming online in the peer-reviewed Journal of Experimental Social Psychology.