ELECTROPHYSIOLOGICAL EVIDENCE FOR ABNORMAL ERROR MONITORINGIN PEOPLE WITH INTERNET ADDICTION DISORDER

Objective:To investigate the neuropsychological mechanisms of error processing function of IAD(Internet Addiction Disorder,IAD) individuals through ERP.Methods:Sixteen IAD individuals met TAO'S criteria were enrolled as a research group,and 16 healthy persons with matched gender and age were enrolled as a control group.The stimuli of Eriksen flanker task is an arrow string consisted of five arrows.The stimulus lasted for 100 ms and the subsequent blank screen time was 800 ms,which was recorded as response time.EEG was recorded during the task processing.NeroScan was used to analyze the ERN amplitude of error response of Eriksen flanker task offline and the SPSS 17.0 was used to analyze the behavioral data.Results:In the Eriksen flanker task,the response time of the IAD group(358.51±s 36.35)was significantly shorter than the control group(398.24±s 26.95,P0.05).The repeatedly measured variance analysis revealed that the main effects were between groups and response,the interaction effect of response× electrode site,in the ERN amplitude as stimulated by Eriksen flanker task(between group:F(1.30)=5.396,P0.05;for response style:F(1.30)=130.384,P0.05;for response style×electrode sites:F(1.30)=40.975,P0.01),A further simple effect analysis showed that the FZ point has the maximum amplitude.IAD patients showed reduced ERN components compared to the control group.Conclusion:The IAD patients had a neuropsychological characteristic of reduced error monitoring ability and the ERP feature.It is indicated that IAD is possibly a disease related to error monitoring mechanism.