Emotional Sensitivity Of Non-suicidal Self-injury Among College Students

Non-suicidal self-injury is a serious psychopathological behavior.Non-suicidal self-injury has a higher incidence in both adults and adolescents,is associated with many psychological problems or psychiatric disorders,and is associated with a much higher suicide risk among non-suicidal self-injurers than in the general population.The high incidence and risk of non-suicidal self-injury have made it one of the hot issues of public health world wide in recent years.Non-suicidal self-injurers often have strong negative emotions,and so they use non-suicidal self-injury as a means to relieve negative emotions.Some theories suggest that this is due to the high emotional sensitivity of non-suicidal self-injurers,which is mainly manifested by the fact that non-suicidal self-injurers are more sensitive to emotional information than ordinary people and can quickly and accurately identify the emotions of others.In recent years,researchers have verified the theoretical hypothesis,but no consistent conclusion has been reached.DSM-5 redefines the criteria of non-suicidal self-injury.However,few studies have used DSM-5 to select non-suicidal self-injury subjects,which may lead to the mixing of pathological self-injurers and non-pathological self-injurers in non-suicidal self-injury population.The heterogeneity of subjects may affect the reliability of research results.Therefore,it is necessary to clarify the necessity of non-suicidal self-injury classification.Therefore,the purpose of this study is to verify whether non-suicidal self-injurers have the characteristics of high emotional sensitivity,whether different emotional states affect the emotional sensitivity of non-suicidal self-injurers,and whether there are differences in the incidence and emotional sensitivity of two different types of non-suicidal self-injurers.In this study,the non-suicidal self-injury behavior of 1803 college freshmen was investigated,and 90 of them were selected as subjects,including pathological non-suicidal self-injury group,non-pathological non-suicidal self-injury group and healthy controls group.Dynamic facial expression recognition experiment and emotion priming experiment were carried out respectively to test the emotional sensitivity of nssi college students from behavioral indicators(response time and accuracy)and physiological indicators(skin electricity and heart rate).Results:(1)The incidence of non-suicidal self-injury in the past year in the overall sample was 15.75%and the incidence of pathological non-suicidal self-injury was 4.6%,and there was no gender difference.(2)The results of the affective priming experiment found that there was no significant difference in the skin electricity and heart rate of the three groups of subjects,either in the resting state or after the affective priming.(3)The experimental results of face recognition showed that the speed of accurately recognizing dynamic facial expressions of pathological non-suicidal self-injurers was higher than that of non-pathological non-suicidal self-injurers and the control group after neutral emotion induction.There was no difference between the non-pathological non-suicidal self-injurers group and the control group.Under the induction of sadness,there was no difference in the correct response time and correct rate among the three groups.(3)Conclusion:the behavioral indicator of this study proves that pathological non-suicidal self-injurers have high emotional sensitivity in a calm state.Pathological non-suicidal self-injurers and non-pathological non-suicidal self-injurers are heterogeneous groups.The emotional sensitivity of non-suicidal self-injurers was not found in autonomic neurophysiological indicators.