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Snap judgments during speed dating
Date:11/12/2012

d want to date that person. After cycling through as many as 90 faces, the participants then rated the faces againoutside the fMRI machineon attractiveness and likeability on a scale from 1 to 9. Later, the volunteers participated in a real speed-dating event, in which they spent five minutes talking to some of the potential dates they had rated in the fMRI machine. The participants listed those they wanted to see again; if there were any matches, each person in the pair was given the other's contact information.

Perhaps to no one's surprise, the researchers found that the people who were rated as most attractive by consensus were the ones who got the most date requests. Seeing someone who was deemed attractive (and who also ended up with more date requests) was associated with activity in a region of the rater's brain called the paracingulate cortex, a part of the dorsomedial prefrontal cortex (DMPFC), which is an important area for cognitive control and decision making. The paracingulate cortex, in particular, has been shown to be active when the brain is comparing options.

This phenomenon was fairly consistent across all participants, says Jeff Cooper, a former postdoctoral scholar in O'Doherty's lab and first author of the paper. In other words, nearly everyone considers physical attraction when judging a potential romantic partner, and that judgment is correlated with activity in the paracingulate cortex.

"But that's not the only thing that's happening," Cooper adds. When some participants saw a person they wanted to datebut who was not rated as very desirable by everyone elsethey showed more activation in the rostromedial prefrontal cortex (RMPFC), which is also a part of the DMPFC, but sits farther in front than the paracingulate cortex. The RMPFC has been previously associated with consideration of other people's thoughts, comparisons of oneself to others, and, in particular, perceptions of similarities with others. This suggests t
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Contact: Brian Bell
bpbell@caltech.edu
626-395-5832
California Institute of Technology
Source:Eurekalert  

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