Research Of Accepted-repulsive Cognitive Bias Of Depression Susceptible College Students Under Different Emotional Stimuli

According to the statistics of the World Health Organization in 2002,the number of people diagnosed with depression in the world reached 150 million.Moreover,our country is in the turning point of economic development.Under this background,the incidence of depression increases year by year.The annual prevalence of depression is 5%-10%,of which about 10%-25% choose to commit suicide.In addition,the recurrence rate of post-treatment depression is as high as 30%-40%..Depressive individuals are more in need of belonging,and have higher sensitivity to rejection of others.In the past,depression-related research focused on the exclusion of others as stressful events,while ignoring the individual's perception of exclusion and acceptance of others.In interpersonal communication,individuals who are susceptible to depression often perceive their attitudes towards others from the perspective of speech and behavior.The phenomenon of “collective depression” exists among college students,which is due to their “feeling of being rejected”.Therefore,it is important to explore the psychological mechanism of depression-susceptible college students' cognition of accepting and rejecting others,to understand the causes of depression susceptibility cognition,and to prevent and interfere with depression in college students.In this study,the prevalence and influencing factors of depression in college students were analyzed using questionnaire surveys(stream call depression self-evaluation scale,negative cognitive processing bias vector,rejection sensitivity scale,and comprehension of social support scale).Next,the depression-susceptibility group and the normal control group were studied.The behavioral experiments(Go/No-go paradigm)and event-related potential studies were used to investigate the characteristics of emotional cognition and brain activation in depression-susceptible individuals under different emotional stimuli,come to the following result:1.Female students(=4.781,p=0.000),only child students(=4.904,p=0.027),urban students(=4.065,p=0.045)have a high incidence and high scores of depression in the college student population.2.Rejection sensitivity(r=0.400,p<0.01),negative cognitive processing bias(r=0.475,p<0.01),perceived social support(r=-0.281,p<0.01)had a greater impact on depression.3.Depression predisposing individuals to exclude the face of excessive attention to affect the emotional stimulus judgment;perception of neutral face and receiving face perception is not accurate,there is the phenomenon of loss of pleasure;there is obvious exclusion stimulus processing.ERP waveform characteristics of depression-susceptibility group increased the amplitude of the exclusion vocabulary P1,the nature of the face and the vocabulary nature of the No-go task P2 amplitude was significantly greater than the normal control group,the Go task P3 amplitude was significantly greater than the No-go task,The amplitude of task P3 in receiving face was greater than those in excluding faces,and the amplitude of response to neutral words was greater than that of other words.The average amplitude of EEG was generally smaller than that of normal control from early stage to late stage(P1 / P2 / P3).In summary concluded:(1)Depression-susceptible college students have negative cognitive processing bias,are more sensitive to refusal,and have less ability to comprehend social support.(2)Depression-susceptible college students differed from normal college students in early emotional face recognition,lexical mood assessment,and advanced advanced cognitive processing.