
Incidental emotions, caused for instance by a traffic jam, influence the way we interact with others and specifically how much we trust others.
Negative emotions suppress trust
For the study, UvA neuroeconomist Jan Engelmann teamed up with UZH neuroeconomists Ernst Fehr, Christian Ruff and Friederike Meyer. The team investigated whether incidental aversive affect can influence trust behavior and the brain networks relevant for supporting social cognition. To induce a prolonged state of negative affect, the team used the well-established threat-of-shock method, in which participants are threatened with (but only sometimes given) an unpleasant electrical shock. This threat has been shown to reliably induce anticipatory anxiety. Within this emotional context, participants were then asked to play a trust game, which involved decisions about how much money they wished to invest in a stranger (with the stranger having the possibility to repay in kind, or keep all the invested money to themselves). The researchers found that participants indeed trusted significantly less when they were anxious about receiving a shock, even though the threat had nothing to do with their decision to trust.














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