| Belief in a just world(BJW),proposed by Lerner and Simmons,refers to the idea that people are motivated to believe that they live in a just world where everyone gets what they deserve and deserves what they get.Since Lerner first put forward BJW,scholars have been studying the BJW for more than half a century.Early studies have focused more on the negative side of the BJW,such as derogations from victims,while in recent years the study has focused more on the adaptive functions of BJW,such as a personal resource for the maintenance of individual mental health.A large number of studies have shown that the belief in a just world is closely related to some variables of psychosocial adaptability,such as psychological well-being,life satisfaction,optimism,gratitude and psychological resilience.Studies have shown that,in addition to being closely related to mental health,the BJW may'also be associated with physical health.This is mainly because individuals in the belief in a highly just world tend to underestimate the stress they face,which helps to reduce the destructive stress response of individuals to individuals caused by external stress.The greatest source of stress for adolescents comes from academic stress,and long-term and excessive academic stress may lead to a sense of learning burnout and further adverse effects on sleep quality.Self-esteem is a positive attitude that individuals hold towards themselves as a whole.Highly self-respecting individuals often consider themselves valuable,good enough,and often associated with positive psychological variables,such as optimism,positive coping strategies,and physical and mental health.Therefore,the present study intends to examine whether academic burnout would mediate the relation between BJW and sleep quality,and whether self-esteem would moderate the mediating process.To investigate the relationship between BJW and sleep quality,as well as its underlying mechanism,a sample of 619 high school students from 2 high schools in Shandong province were recruited for the study.They were required to complete a battery of questionnaires,including Belief in a just world questionnaire,Pittsburgh sleep quality index,Academic burnout scale,and the Rosenberg self-esteem scale.Data were collected and analyzed with SPSS 22.0,and the bias-corrected percentile bootstrap method was used to analyze the moderated mediation model.The results indicated that:(1)Two types ofjust world belief(personal BJW and general BJW)are significantly negatively correlated with academic burnout and sleep quality.There was also a significant positive correlation between student burnout and sleep quality.(2)Both personal and general BJW can significantly predict the quality of sleep in adolescents,and student burnout plays a partial mediating role in the relationship,but it plays a complete mediating role in the relationship between belief in the general just world and sleep quality.(3)Self-esteem enhanced the positive impact of personal BJW on student burnout,thereby strengthen indirect effect of personal BJW on sleep quality.Similarly,Self-esteem enhanced the positive impact of general BJW on student burnout.The mediating effect of academic burnout on the relationship between the general BJW and sleep quality,however,is only significant in individuals with high self-esteem level.This study complements and perfects the adaptive Function of BJW to physical health by examining the relationship between the BJW and sleep quality.In addition,this study also provides a new perspective and useful suggestions on how to alleviate the sense of learning burnout faced by young people and further improve the sleep quality of adolescents. |
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