Evolution and Developmental Sex Differences

Author: David C. Geary1

Source: Current Directions in Psychological Science, Volume 8, Number 4, August 1999 , pp. 115-120(6)

Publisher: Blackwell Publishing

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Abstract:

From an evolutionary perspective, childhood is the portion of the life span during which individuals practice and refine those competencies that facilitate survival and reproduction in adulthood. Although the skeletal structure of these competencies appears to be inherent, social interaction and play flesh them out during childhood so that they are adapted to local conditions. Darwin's principles of sexual selection, including male-male competition over mates and female choice of mating partners, successfully explain the acquisition and expression of reproductive competencies in hundreds of species. When this perspective is applied to humans, it predicts sex differences that are, in fact, found in the childhood activities of boys and girls and that reflect sex differences in reproductive strategies in adulthood. A few of these differences are described, along with cultural factors that modify their expression. The article closes with a brief discussion of the social and scientific implications.

Keywords: Sex differences; sexual selection; development; childhood; culture

Document Type: Research article

DOI: 10.1111/1467-8721.00027

Affiliations: 1: University of Missouri, Columbia, MO

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