Migrant children experience more stressful life events than their urban counterparts. Despite the growing evidence that stressful life events are associated with nonsuicidal self-injury (NSSI), few studies have investigated this relationship using longitudinal designs. Besides, potential mediating factors have been rarely examined. This study tested the temporal relationship between stressful life events and NSSI among Chinese rural-to-urban migrant children, with depressive symptoms as the potential mediator, as well as the potential sex differences in these associations. In the present study, 279 Chinese rural-to-urban migrant children (57.3% females; M age = 11.95, SD = 1.22) reported their stressful life events, depressive symptoms and NSSI a total of three times at 6-month intervals. Depressive symptoms only longitudinally mediated the relationship between stressful life events and NSSI among females. These findings provide evidence that supports the longitudinal effect of stressful life events on NSSI and the mediating role of depressive symptoms among migrant children. Moreover, there are sex differences in these longitudinal relationships.

Parental involvement in adolescents' learning has been linked to high academic achievement, yet few studies have examined its reverse relationship at the same time and the potential mechanisms that underly these associations. To address this research gap, this study investigated the reciprocal relationship between parental involvement and academic achievement as well as the mediating role of adolescents' academic engagement among Chinese adolescents. In addition, the current study explored whether these relationships varied by gender. Using a longitudinal design, a total of 2381 secondary school students (48.8% girls, Mage = 13.38 ± 0.59) participated in the study. The results found significant positive directional effects from academic achievement to parental involvement among total sample, but not vice versa. The cross-lagged effect from academic achievement to parental involvement only existed among adolescent girls. Bootstrap analyses in the total sample revealed that parental involvement was related to academic achievement through the indirect effects of adolescents' behavioral engagement. In terms of gender differences, behavioral engagement totally mediated the path from academic achievement to parental involvement for boys, while no significant mediation effect was found for girls. These results have provided empirical evidence of the evocative role of adolescents' academic characteristics on parenting behaviors and the double-edged effect of parental involvement on adolescents' academic performance, they also suggest that further research is needed to explore effective and appropriate ways for parents to get involved in adolescents' learning in order to promote their children's academic achievement.

BackgroundLeft-behind adolescents who are from father-migrant/mother caregiver families have become the main type of left-behind children in China. The migratory of fathers not only makes left-behind adolescents suffer more difficulties but also causes left-behind women to face the challenge of raising the child alone. This study examined the association among peer victimization, maternal psychological control, and adjustment problems among Chinese rural left-behind adolescents. Furthermore, we first explored the moderating role of maternal behavioral control in this relationship.MethodsUsing cross-sectional design, we recruited 194 left-behind adolescents (49% girls; mean age = 13.51, SD = 1.03) from four junior schools in the Guizhou province of China. Left-behind adolescents completed a battery of self-report questionnaires regarding peer victimization, maternal control, self-injury behaviors, depression, and loneliness.ResultsThe hierarchical multiple regressions indicated that both peer victimization and maternal psychological control were positively associated with self-injury behaviors, depression, and loneliness. Moreover, maternal behavioral control played a dual role in the impact of peer victimization on self-injury behaviors depending on the levels of maternal psychological control. When left-behind women exerted high psychological control on their children, maternal behavioral control buffered the negative effect of peer victimization on self-injury behaviors. However, when left-behind women exerted low psychological control on their children, maternal behavioral control exacerbated the negative effect of peer victimization on self-injury behaviors.ConclusionThese findings suggest that the effectiveness of behavioral control may depend on different situations, left-behind women should be cautious in exerting behavioral control over their children.

(1) Background: Numerous studies suggest strong associations between childhood maltreatment and nonsuicidal self-injury (NSSI); this is also true for the roles of dopaminergic genes in the etiology of some psychopathologies related to NSSI. Investigating the interactions of environments and genes is important in order to better understand the etiology of NSSI. (2) Methods: Within a sample of 269 Chinese male adolescents (Mage = 14.72, SD = 0.92), childhood maltreatment and NSSI were evaluated, and saliva samples were collected for MAOA T941G and COMT Val158Met polymorphism analyses. (3) Results: The results revealed no primary effects attributable to MAOA T941G and COMT Val158Met polymorphism on NSSI. However, there was a significant three-way interaction between MAOA, COMT, and child abuse (β = −0.34, p < 0.01) in adolescent NSSI. Except for carriers of the T allele of MAOA and the Met allele of COMT, all studied male adolescents displayed higher NSSI scores when exposed to a higher level of child abuse. A similar three-way interaction was not observed in the case of child neglect. (4) Conclusions: The results indicate that the MAOA gene and COMT gene play moderating roles in the association between child abuse and NSSI of male adolescents and suggest the polygenic underpinnings of NSSI.

Chinese left-behind children have faced a high level of stress and tend to engage in nonsuicidal self-injury (NSSI) behavior. However, the impacts of parental migration on NSSI are complex. The improved family's socioeconomic status (SES) could have positive impacts on these children's mental health, yet the parental absence could have negative influences. To explore the complex dynamics of parental migration on NSSI, this study examined the roles of parent-child cohesion and SES in the relationship between stressful life events and NSSI. Method: A total of 509 left-behind children completed self-report surveys that addressed stressful life events, NSSI, parent-child cohesion, and SES. Results: Stressful life events were positively related to NSSI in both the migrant father and two migrant parents' groups. Furthermore, for children with migrant fathers, father-child cohesion and SES significantly moderated the relation between stressful life events and NSSI. The interaction of stressful life events, mother-child cohesion, and SES also was significant. For children with two migrant parents, mother-child cohesion was negatively related to NSSI. No significant interactions were found in this group. Conclusions: The findings suggested that, although parent-child cohesion and SES were both important for the prevention of NSSI among left-behind children, parent-child cohesion should remain a priority. Nonsuicidal self-injury (NSSI) is the intentional destruction or mutilation of body tissue without suicidal intent, including hitting, cutting, burning, banging, and scratching (Nock, 2010). NSSI peaks during adolescence and the prevalence is 17.2% among adolescents worldwide, far higher than that of 5.5% in the adult population (Swannell, Martin, Page, Hasking, & St John, 2014). Moreover, it has been associated with many other mental health problems, even suicide (Nock, 2010). Given the high prevalence and serious consequences, NSSI has become a prominent worldwide health concern. Adolescents who experience stress are more vulnerable to NSSI. Both cross