Behavior: Looking for a Life of Thrills

Type Ts take risks, scorn rules, pursue the uncertain

Comedian John Belushi. Gangster John Dillinger. Nobel Biologist Francis Crick. All are classic Type T personalities, and so, fittingly enough, is television's Mr. T.

As Psychologist Frank Farley of the University of Wisconsin tells it, many of the world's daredevils, doers and delinquents share a common personality, Type T (for thrill seeking). Whether scientists or criminals, mountain climbers or hot-dog skiers, says Farley, all are driven by temperament, and perhaps biology, to a life of constant stimulation and risk taking. Both the socially useful and the socially appalling Type Ts, he says, "are rejecting the strictures, the laws, the regulations--they are...

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