Sex Differences in Risk Taking: Repeated Sessions on a Computer-Simulated Task

摘要

Two experiments were conducted to investigate sex differences in risk-taking behavior on a computer-generated and controlled task. Male and female subjects faced a video display of simulated mine fields with varying numbers and patterns of dots representing mines in the fields. In Experiment 1, they estimated the probability that a tank might successfully cross 100 mine fields when starting from an unknown point below each field. This was followed by the risk-taking task in which they decided whether to send a tank across each of the fields. The participants were tested on the risk-taking task once in Experiment 1 and over four separate sessions in Experiment 2. No significant sex differences were found in the participants' ability to estimate probabilities or in their total scores for decisions made on the risk-taking task. In low probability-of-success situations, women initially took greater risks than men but took longer to make their decisions; in all subsequent sessions, this pattern was reversed, with men taking greater risks and a longer time to make decisions. The findings support the growing body of evidence that men are more inclined to take risks than women in a variety of situations, indicate the importance of obtaining data over repeated sessions when investigating sex differences in risk taking, and demonstrate that computer-simulated tasks can provide a valid means for laboratory studies of sex differences in risk taking.