Fair Consideration Of Highly Aggressive Individuals:A Behavior And FNIRS Study

Neural physiological and behavioral studies have shown that high aggressive individuals exists cognitive bias. However, so far. there is no research to explore the cognitive bias in behavior and neural processing in the field of decision-making process. Of this study was to explore the individuals with high aggressiveness against individuals with low aggressiveness in the individual behavior model and neural processes in social interaction. Participants act as responder in the Mini-UG task in experiment 1 and experiment 2, experiment is a behavior experiment, experiment 2 is a fNIRS experiment.The main conclusions are as follows:(1)Individuals with low trait aggression significantly accept more unfair proposal under three kinds of social context than individuals with high trait aggression, suggesting that the individual’s trait aggression influence the accept rate of unfair offers.(2)The acceptance rate under the ambiguous situation and the altruism situation is significantly higher than it under self-interest situation; the acceptance rate under the ambiguous situation and altruistic situation exists no difference significantly. These results suggest that they put the intentions of other players into consideration, which means that the intention of the offers affect the individual’s behavior.(3)High and low aggressive individuals under altruism condition did not differ on the degree of brain activation in the right TPJ area, showing that high aggressive individuals have noticed the intentions of unfair offers, which is same as low aggressive individuals.(4)Under the ambiguous situation and self-intrest situation, high aggressive individual show less activation in the right TPJ than low aggressive individuals, and the activation degree under these two kinds of situations was not significant. This may reflect cognitive bias reflected in social decision-making in individuals with high aggressiveness.