The researchers said the judges could identify some personality traits even when people were pictured in controlled positions.

VOA: special.2009.11.24

Dr Wang is seeking to identify specific genetic traits that make women more likely to give birth to a low birth weight or premature baby.

BBC: Gene clue to pregnancy riddle

The study, by Nansook Park and Christopher Peterson, used data collected through an online survey to identify whether personality traits were significantly different across cities and published their findings in the September issue of American Psychologist.

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He designed eHarmony to identify and align these shared traits, and to keep opposites away from each other.

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