How alike are you and your husband or wife — or, you and your best friend? Probably more alike than you realize. A study of twins shows that peoples spouses and best friends are much more similar to them than was previously recognized — about as close as brothers and sisters. The research also suggested that the preference for partners who are similar to us is partly due to our genes.
The research was conducted by J. Philippe Rushton and Trudy Ann Bons of the University of Western Ontario. Their findings are reported in "Mate Choice and Friendship in Twins: Evidence for Genetic Similarity," published in the July 2005 issue of Psychological Science, a journal of the American Psychological Society.
Several hundred pairs of identical and fraternal twins, their spouses, and their best friends were sent a 130-item questionnaire that measured social background, personality, and attitudes. Twins turned out to be as similar to their spouses and friends as they were to their fraternal twins, though not as similar as they were to identical twins. The spouses of identical twins (who share 100 percent of their genes) were also more similar to each other than were the spouses of fraternal twins (who only share 50 percent of their genes); the same was true of twins best friends.
J. Philippe Rushton | EurekAlert!
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