Interpersonal Interaction In Social Decision-making: An Erp Study Of The Prisoner's Dilemma Task

Interpersonal interaction refers to the social activities, or for other people's actions and reactions.cooperation and competition are it's basic forms,they merge our life, It is an area of much concern among social psychology and sociology. It has long been observed that people are capable of accurately and flexibly interpreting the behavior of those around them. The ability to infer information about the causal mental states of our social partners is central to this everyday act, and it is remarkable that we are able to do this effortlessly based on the ted information available to us. The development of neuroimaging technology provides the tools to investigate neural substrates of Interpersonal interaction, which became one of the research focuses of cognitive neuroscience. Because of the relatively low temporal resolution of PET and fMRI, the time-course of cerebral dynamic processes can't be precisely described and explained. As a result, previous studies emphasized particularly the cerebral localization of Interpersonal interaction, but neglected the analysis of the time-course in the dynamic processes.Based on the literature review of former studies, this dissertation summarizes previous research conclusion of consistency and difference, this dissertation exerted the advantage of high temporal resolution of ERP, recorded the EEG data from 64 scalp electrodes by ERP system. Through employing the normal freshman as participants, the present dissertation analyzed the behavioral performance, ERP components and topography off-line to reveal the time course of the Interpersonal interaction.this study use the real situation of social games," the Prisoners'Dilemma game " (PDG).This game that both players simultaneously choose whether or not to trust each other, without knowledge of their partner's choice. In the PDG, payoffs depend on the interaction of the two choices. The largest payoff to the player occurs when he or she defects and the partner cooperates, with the worst outcome when the decisions are reversed (player cooperates while partner defects). Mutual cooperation yields a modest payoff to both players, whereas mutual defection provides a lesser amount to each. Subjects will play the iterated PD game in two conditions, one in which they believe they are playing a human opponent and one in which they believe they are playing a computer program. This study will attempt to isolate processes uniquely involved in decision making in social dilemma's. It is hypothesized that social and non-social information is processed and acted upon differently. Behavioral and ERP data from this task will effectively isolate differences in cognition caused by this perceptual difference.We are trying to compare the cooperative and non-cooperative two conditions for the ERP waveform when both human and computer partner were played, so that investigate the cognitive basis of interpersonal interaction.We found that select cooperation induce a very similar ERP waveform to non-cooperate. The medial frontal cortex was activated when both human and computer partner were played。...