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Institute
- Institut für Psychologie (35) (remove)
Human risk behavior is the subject of growing research in the field of psychology as well as economics. One central topic is the influence of psychological variables on risk behavior. Studies contained in this work investigated the impact of arousal, framing and motivation on risk behavior.
Arousal can on the one hand be a temporarily stable trait and on the other hand a situation-dependent variable. We showed that low trait arousal, measured via resting heart rate, predicted risky behavior. After physical exercise, state arousal was heightened in the experiment. Participants tended to act less risky after physical exercise. Taken together, the results suggest an inverse relation of arousal and risk behavior. Most studies investigating risk behavior employ a payment method that we call pay-one method: although the gambles that are used consist of many trials, only one trial is paid out. We investigated the effect of the payment method on risk behavior by employing both the pay-one and a pay-all method, which pays out all trials, in a within-subjects design. We found that participants acted about 10% less risky in the pay-one condition compared to the pay-all condition. This result suggests that risk-aversion is over-estimated in common risk paradigms that use the pay-one method.
When we worked on a hard task before, we like to engage in a more likable task afterwards. That observation led to the general classification of tasks in want-to and have-to tasks. Our body system strives towards a balance between those two task types in the sense of a homeostasis. We assessed event-related potentials (ERPs) in a risk game that we treated as a want-to task. When participants worked on a difficult have-to task before, amplitudes of the ERP-components in the risk game were raised compared to a condition where participants worked on an easy task before. We conclude that the motivation shift towards a want-to task after a have-to task can be assessed via ERP amplitudes.
In conclusion, it was shown that arousal, framing and motivation are important psychological variables that influence risk behavior. The specific mechanisms of these influences have been investigated and discussed.