The Time-course Difference of Attentional Bias to Reward-associated and Punishment-associated Facial Stimuli:An ERP Study
To investigage the neural activity characteristics of reward-associated and punishment-associated stimuli in the time course of attentional bias,the training-test procedure was adopted in the present study.In the training phase,an explicit associative learning paradigm was used,and in the testing phase,the dot-probe paradigm was adopted,combined with event-related potential(ERP)tech-nique.Results showed that:First,RTs were faster to probes replacing reward-associated and punishment-associated stimuli compared to zero-outcome-associated stimuli,and there was no difference in attentional bias score between reward-associated and punishment-associated stimuli.Second,reward-associated stimuli elicited significant early N2pc components,late N2pc components and SPCN components,while punishment-associated stimuli elicited significant late N2pc components and SPCN components.Reward-associat-ed stimuli elicited a larger early N2pc components than punishment-associated stimuli.The main conclusions are as follows:(1)Atten-tional orienting to reward-associated facial stimuli emerged earlier than orienting to punishment-associated facial stimuli.(2)Disen-gagement of attention from reward-associated and punishment-associated facial stimuli was delayed.
万方数据
维普
