The P300 and Reward Valence,Magnitude,and Expectancy in Outcome Evaluation
The event-related potential(ERP)component P300 has been implicated in outcome evaluation and reward processing,but it is still controversial to what aspects of reward processing it is sensitive.This study manipulated reward valence,reward magnitude,and magnitude expectancy orthogonally in a monetary gambling task and observed both the valence and the magnitude effects on P300.Moreover,these effects were modulated by whether the amount of reward was expected or unexpected on the basis of a previous cue.The FRN(feedback-related negativity)was found to be sensitive to reward valence and magnitude expectancy,but the expectancy effect was observed only when the amount of reward involved was small.These findings demonstrate that the P300 is sensitive to both reward magnitude and reward valence,but only when the amount of reward is expected.
Yan Wu Xiaolin Zhou
Key Laboratory of Child Development and Learning Science(Southeast University),Ministry of Education Center for Brain and Cognitive Sciences,Key Laboratory of Machine Perception(Ministry of Education),
国际会议
2008亚太心智、脑和教育学术会议(Asia-Pacific Conference on Mind Brain and Education 2008)
南京
英文
102-104
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）