An ERP Study On The Characteristics Of Emotional Cognitive Bias About College Students With Childhood Psychological Maltreatment

The occurrence probability of psychological maltreatment is very common,the occurrence form is very concealed and difficult to detect,which gradually attracts people’s attention at this stage.In order to explore the characteristics of emotional cognitive bias of college students who suffered psychological maltreatment in childhood,this study focused on emotional attention bias and emotional memory bias in emotional cognitive bias.Seventeen college students who suffered psychological maltreatment in childhood and 17 college students who did not suffer from psychological maltreatment in childhood were measured and recorded by Event-Related Potential(ERP).The specific research process is as follows:Study 1 explored the characteristics of emotional attention bias of psychological maltreatment college students in childhood by using dot-probe paradigm.The results showed that the reaction time of psychological maltreatment college students in childhood to negative emotional pictures was significantly less than that of positive emotions;The results of ERP showed that the amplitude of negative emotional pictures was significantly smaller than that of positive emotional pictures in N1 component,while the amplitude of negative emotional pictures was significantly larger in P2 and P3 component than that of positive emotional pictures in control group,but there was no significant difference in emotional types in control group.Study 2 used the learning-recognition paradigm to investigate the characteristics of emotional memory bias of the students who suffered psychological maltreatment in childhood.The behavioral results failed to find out the differences in memory bias between the students who suffered psychological maltreatment in childhood and the control group.In the ERP experiment,the main effect of N1 component group in the learning and recognition stages was significant,and the average amplitude of N1 component group in the psychological maltreatment group in childhood was larger than that in the control group.In the control group,the main effect of emotional type in recognition stage was significant,and the average amplitude of negative emotions was larger than positive emotions;in learning stage and recognition stage,the main effect of P2 component group was significant,and the average amplitude of psychological maltreatment subjects in childhood was smaller than that of control group;in learning stage,the main effect of N450 component group was significant,and the average amplitude of psychological maltreatment students in childhood was significantly larger than that of control group.In recognition stage,the main effect of LPP component group was significant,and the average amplitude of psychological maltreatment students in childhood was smaller than that of the control group.According to the behavior and ERP results,the following conclusions can be drawn:Firstly,college students who suffered psychological maltreatment in childhood have a attention bias to negative emotions.Secondly,there are obstacles in the adjustment of attention and difficulties in separation of attention among students who suffer from psychological maltreatment in childhood.Thirdly,there is no obvious memory bias towards negative emotions among college students who suffered psychological maltreatment in childhood.Fourthly,the ability of conflict monitoring of college students who suffered psychological maltreatment in childhood is insufficient.Fifthly,compared with the control group,the cognitive function related to memory of the students who suffered psychological maltreatment in childhood is obviously insufficient.