In Baseball, Younger Siblings Steal More Bases

By Guest
Updated: June 26, 2010

Evolutionary theory suggests younger siblings take more risks. New research finds that is true — at least on the baseball diamond.

Younger siblings are more prone to taking risks. That is a long-standing theory of University of California, Berkeley, evolutionary psychologist Frank Sulloway, who argues this behavior is a reaction to their relative lack of parental attention.

The look-at-me hypothesis makes intuitive sense, and evidence for it was presented in a study of economic behavior last year. But proving its validity to skeptics would require finding a controlled setting where personality traits are exposed in clearly measurable ways — like a baseball diamond.

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