I Just Called...: Sexual Strategies  

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Jenis: Article from Bulletin/Magazine
Dalam koleksi: The Economist (http://search.proquest.com/) vol. 403 no. 8780 (Apr. 2012), page 83.
Topik: Personal Relationships; Social Research; Gender; Women; Men; Psychological Aspects

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Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.71 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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A study published in Scientific Reports by Robin Dunbar, of Oxford University, and his colleagues is discussed. Evolutionary psychologists like Dunbar are interested in how investment in close relationships differs between the sexes. Dunbar tapped a trove of 2 billion anonymised telephone calls and 500,000 text messages between customers of an unnamed European mobile-phone operator over the course of seven months. After eliminating those for which age and sex data were unavailable, they identified the people each subscriber contacted most often. Frequency of contact is a good proxy for emotional closeness. For any given age, the researchers then calculated the average sex of men's and women's phone pals. Between the ages of 20 and 40 men and women behaved similarly. Both tended to have best friends of the opposite sex. Things change markedly, though, as people enter middle age. For men, the best-friend sex index falls steadily from its peak until it levels off at the age of 50 or so, while remaining skewed towards females for the rest of their lives. However, any sexual bias for second-best friends more or less disappears when men reach their 40s. Among women, by contrast, the best-friend sex index plummets around the time menopause strikes.

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