| Aggressive behavior is refers to the individual to others’ behavior with harmful purposes,including physical attack and relational attack.Junior middle school students are in the critical period of self-consciousness formation,morality is in the stage of development,lack of rational thinking for things judgment,easy to make aggressive behavior violating social norms.Home environment can affect the junior middle school students personality development and the behaviour of the individual.Childhood psychological abuse refers to a series of bad parenting methods or behaviors adopted by caregivers to children during their growth,such as neglecting,derogating or even intimidating children.The junior middle school students who have experienced psychological abuse in childhood have higher level of negative emotions and are more likely to make hostile attributions to external information in social interaction,thus having higher level of aggression.The home environment can also affect an individual’s cognitive tendencies.As a cognitive tendency,moral disengagement can affect the individual’s judgment of whether an event is moral or not.Individuals with high levels of moral disengagement are more likely to view unethical behavior（such as aggression）as moral behavior,so individuals with high levels of moral disengagement have higher levels of aggressive behavior than individuals with low levels of moral disengagement.In addition,Callous-unemotional is an individual personality trait.Junior middle school students with this trait have defects in empathy and recognition of others’ painful emotions.Callous people are characterized in life by a lack of care for their own performance,a lack of empathy,and feelings of guilt.Compared with low callous individuals,high callous individuals exhibit more stable and aggressive antisocial behaviors.They are unable to empathize or actively care for others,which makes them appear cold and callous after hurting others.This study investigated the effect of childhood psychological abuse on aggressive behavior of junior middle school students,and took moral disengagement as a mediating variable and callous-unemotional trait as a moderating variable to investigate its internal mechanism.This study adopts questionnaire survey,questionnaire,randomly selected from 402 human subjects to collect data.This research adopts the "Buss-Perry aggressive scale","childhood psychological abuse scale","the moral engagement scale" and "the callous-unemotional traits scale" has good reliability and is suitable for this study.In this study,the reliability and validity of the four questionnaires in this study were analyzed by SPSS22.0 and PROCESS macro program.Then statistical analysis was conducted to explore the relationship between childhood psychological abuse and aggressive behavior of junior middle school students.The mediating effect and moderating effect were tested,and the results were as follows:（1）There are significant differences in the age of junior middle school students’ aggressive behavior.13-and 14-year-olds had higher levels of aggression than 15-and 16-year-olds.The moral disengagement of junior middle school students has significant difference in age.The moral disengagement level of junior middle school students aged 13 was significantly higher than that of junior middle school students aged 14-16.（2）Psychological abuse and moral disengagement were significantly correlated with aggressive behavior in childhood.There was a significant positive correlation between childhood psychological abuse and moral disengagement,that is,the higher the level of childhood psychological abuse,the higher the level of aggression.Moral disengagement is positively correlated with aggressive behavior of junior middle school students,that is,the higher the level of moral disengagement,the higher the level of aggression.（3）Moral disengagement partially mediated the relationship between childhood psychological abuse and aggressive behavior.The mediating effect was 15.38%.（4）Callous-Unemotional trait plays a moderating role in the path of moral disengagement and aggressive behavior,that is,with the increase of the level of Callous-Unemotional,the impact of moral disengagement on aggressive behavior of junior middle school students will become greater. |
