Psychological maltreatment by teachers and peer victimization in Chinese youth: Depression and aggression as mediators.

BACKGROUND: Psychological maltreatment by teachers and peer victimization are significant public health issues among youth. However, few studies have verified transactional associations between psychological maltreatment by teachers and peer victimization at the within-person level and the mediating roles of depression and aggression have yet to be fully evaluated. OBJECTIVE: This study examined the transactional associations between psychological maltreatment by teachers and peer victimization from middle childhood to early adolescence, separating within- and between-person variation. The study also examined whether youth's depression and aggression mediated the associations. PARTICIPANTS AND SETTING: A total of 4945 Chinese youth (Mage = 9.92 years, SD = 0.73 53 % boys) completed a packet of measures on five occasions at 6-month intervals from May of 2017 to May of 2019. METHODS: Random Intercept Cross-Lagged Panel Models (RI-CLPMs) were used to distinguish between- and within-person effects. RESULTS: The results indicated that: (a) Psychological maltreatment by teachers predicted peer victimization, and vice versa; (b) Depression (but not aggression) mediated the associations from peer victimization to psychological maltreatment by teachers. CONCLUSIONS: The findings supported bidirectional spillover effects between adverse teacher-student and peer interactions and demonstrated at the within-person level that such effects were transmitted indirectly via youth's depression.

Longitudinal associations between childhood victimization and neuroticism from middle childhood to early adolescence.

BACKGROUND: Previous cross-sectional and unidirectional longitudinal studies have identified positive associations between childhood victimization and neuroticism in children. However, these studies have not simultaneously examined multiple common sources of childhood victimization (family abuse, teacher abuse, and peer victimization) in relation to neuroticism nor have they distinguished between- and within-person effects. Moreover, the moderating role of child sex in their associations has yet to be fully evaluated. OBJECTIVE: This study examined the within-person longitudinal associations between three common sources of childhood victimization and neuroticism in Chinese children and whether these effects differed between boys and girls. PARTICIPANTS AND SETTING: The sample included 4315 children (55.1 % boys) with an average age of 9.93 (SD = 0.73) years from a large city in China. METHODS: Participants completed self-report measures on five occasions across two years, employing six-month intervals. Random Intercept Cross-Lagged Panel Models (RI-CLPMs) were used to distinguish between-person and within-person effects. RESULTS: Results included: (a) Family abuse (excluding sexual abuse) and peer victimization directly predicted subsequent increases in neuroticism at the within-person level and vice versa, whereas teacher abuse and neuroticism did not reveal significant longitudinal relations at the within-person level; (b) The effect of family abuse on neuroticism at the within-person level was stronger in boys, while the effect of peer victimization on neuroticism at the within-person level was stronger in girls. CONCLUSIONS: Prevention and intervention strategies targeting high neuroticism and childhood victimization should consider the roles of both family and peer systems.

Prediction of suicidal ideation among preadolescent children with machine learning models: A longitudinal study.

BACKGROUND: Machine learning (ML) has been widely used to predict suicidal ideation (SI) in adolescents and adults. Nevertheless, studies of accurate and efficient models of SI prediction with preadolescent children are still needed because SI is surprisingly prevalent during the transition into adolescence. This study aimed to explore the potential of ML models to predict SI among preadolescent children. METHODS: A total of 4691 Chinese children (54.89 % boys, Mage = 10.92 at baseline) and their parents completed relevant measures at baseline and the children provided 6-month follow-up data for SI. The current study compared four ML models: Random Forest (RF), Decision Tree (DT), Support Vector Machine (SVM), and Multilayer Perceptron (MLP), to predict SI and to identify variables with predictive value based on the best-performing model among Chinese preadolescent children. RESULTS: The RF model achieved the highest discriminant performance with an AUC of 0.92, accuracy of 0.93 (balanced accuracy = 0.88). The factors of internalizing problems, externalizing problems, neuroticism, childhood maltreatment, and subjective well-being in school demonstrated the highest values in predicting SI. CONCLUSION: The findings of this study suggested that ML models based on the observation and assessment of children's general characteristics and experiences in everyday life can serve as convenient screening and evaluation tools for suicide risk assessment among Chinese preadolescent children. The findings also provide insights for early intervention.

Understanding general and specific associations between cyberbullying and psychopathological symptoms in adolescents: a latent dimensional approach.

Cyberbullying (perpetration and victimization) is a prevalent public health problem associated with a wide variety of psychopathological symptoms (e.g., depression, anxiety, delinquent behaviors, and substance use). However, the generality and specificity of relations between cyberbullying involvement and psychopathological symptoms have not been investigated. Thus, the current study used a latent dimensional approach to examine how cyberbullying (perpetration and victimization) is associated with underlying dimensions of psychopathology as well as with specific symptoms. General and specific associations were estimated by a series of structural equation models with data from 654 Chinese adolescents (52.4% girls, Mage = 12.96 years, SD = 0.67) in a three-wave study. Results indicated that cyberbullying (perpetration and victimization) was significantly and positively associated with latent internalizing and externalizing dimensions. Cyberbullying involvement was non-significantly associated with most specific symptom domains after accounting for the impact of the latent internalizing and externalizing factors. In a few cases, cyberbullying involvement was directly and uniquely associated with specific symptoms. Findings of significant general and symptom-specific associations have important implications for efforts to develop more efficient and targeted strategies for preventing and treating mental health problems associated with cyberbullying.

Global and domain-specific self-esteem from middle childhood to early adolescence: Co-developmental trajectories and directional relations.

OBJECTIVE: The study used both person-centered (i.e., parallel process latent class growth modeling) and variable-centered (i.e., random intercept cross-lagged panel modeling) approaches to examine developmental changes in global and domain-specific self-esteem from middle childhood to early adolescence. METHOD: A total of 715 Chinese youth participated (54.3% boys; 45.7% girls; Mage = 9.96; SD = 0.51) in a 6-wave longitudinal study with 6-month intervals. RESULTS: Parallel process latent class growth modeling identified three co-developmental trajectories of global and domain-specific self-esteem: Congruent high increasing and then flattening global and domain-specific self-esteem, congruent moderate domain-specific self-esteem with convex global self-esteem, and congruent low with concave appearance and global self-esteem. Results from random intercept cross-lagged panel modeling found reciprocal within-person associations between academic self-esteem and global self-esteem; global self-esteem significantly predicted social self-esteem, while physical appearance self-esteem significantly predicted global self-esteem. CONCLUSION: Evidence was provided for top-down and bottom-up effects of self-esteem among Chinese youth. The findings provided new insight into the development of self-esteem in youth.

Sex-specific joint trajectories of deviant peer affiliation and externalizing problems from middle childhood to early adolescence: the predictive role of family maltreatment.

Previous research has shown a strong link between deviant peer affiliation (DPA) and externalizing problems (EXT) among children and adolescents. Little is known about how DPA and EXT develop jointly over time or possible sex differences in their development. This longitudinal study identified sex-specific joint trajectories of DPA and EXT from middle childhood to early adolescence and investigated the predictive role of family maltreatment experiences in joint trajectories of DPA and EXT. A total of 3622 Chinese elementary school students in grades 3 and 4 (Mage = 10, SD = 0.53; 46.5% girls) comprised the sample. Assessments were conducted every six months on five occasions across 2.5 years. Parallel process latent class growth modeling (PP-LCGM) was used to explore the joint trajectories of DPA and EXT for boys and girls separately. The PP-LCGM identified four trajectories for boys: "congruent-low" (78.2%), "congruent-high" (12.40%), "deviant peer affiliation increasing" (6.5%), and "congruent late increasing" (2.9%). Four trajectories were identified for girls: "congruent-low" (82.5%), "slowly increasing" (10.2%), and "deviant peer affiliation desisting" (5.6%), and "congruent late increasing" (1.7%). After controlling for socioeconomic status (SES), the results showed that compared to the congruent-low group, more severe family maltreatment predicted the high and high-start trajectories for boys. The findings highlighted the joint development of DPA and EXT and the sex differences associated with their development. Findings also shed light on the importance of sex in developmental responses to family maltreatment.

Longitudinal relations among perceived parental warmth, self-esteem and social behaviours from middle childhood to early adolescence in China: Disentangling between- and within-person associations.

Although several studies have addressed the relations between perceived parental warmth and social behaviours, few have distinguished their between- and within-person effects or explored their within-person mediating mechanisms. This study examined the transactional relations among perceived parental warmth (i.e. maternal warmth and paternal warmth), children's self-esteem and children's positive/negative social behaviours (i.e. prosocial behaviour and delinquent behaviour) along with the mediating role of self-esteem after disentangling between- and within-person effects. A total of 4315 Chinese elementary children (44.9% girls; Mage = 9.93 years, SD = 0.73) completed relevant measures on four occasions employing 6-month intervals. Results of random-intercept cross-lagged panel models showed that (a) perceived parental warmth reciprocally and positively predicted prosocial behaviour and self-esteem; (b) perceived paternal warmth reciprocally and negatively predicted delinquent behaviour; (c) self-esteem reciprocally predicted prosocial and delinquent behaviour; (d) perceived maternal warmth reciprocally and positively predicted prosocial behaviour through self-esteem; (e) perceived parental warmth reciprocally and negatively predicted delinquent behaviour through self-esteem; and (f) perceived maternal and paternal warmth differed in their relations with prosocial and delinquent behaviours through self-esteem. These findings illuminated the complicated longitudinal within-person interactions among perceived parental warmth, self-esteem, and social behaviours, the specific mediating mechanism of self-esteem, and the differing results associated with perceived maternal and paternal warmth, all of which yield significant implications for assessments and early interventions aimed to promote positive social behaviour.

Association between emotional abuse and depressive symptoms in Chinese children: The mediating role of emotion regulation.

BACKGROUND: Emotional abuse has been identified as a risk factor for children's depressive symptoms. However, the specific psychological mechanisms mediating this relation are not well understood. OBJECTIVE: This longitudinal study examined the relation of emotional abuse to subsequent depressive symptoms and the possible mediating role of emotion regulation among Chinese children. PARTICIPANTS AND SETTING: The sample included 3633 children (45.5 % girls) with an average age of 9.96 years from a large city in southern China. METHOD: Participants completed multiple measurements of emotional abuse, emotion regulation, and depressive symptoms on five occasions at six-month intervals, controlling for sex, age, and physical abuse and emotional neglect at Time 1. Latent growth curve modeling was applied to examine the longitudinal relations among the variables. RESULTS: Results showed (a) emotional abuse was significantly positively associated with subsequent depressive symptoms; (b) cognitive reappraisal mediated the relation between emotional abuse and depressive symptoms, but expressive suppression did not. CONCLUSIONS: The results highlighted the mediating role of cognitive reappraisal in the relation between emotional abuse and depressive symptoms, suggesting that intervention programs targeting cognitive reappraisal may be effective to reduce the likelihood of depressive symptoms among Chinese children.

Longitudinal Association and Mediating Mechanism Between Externalizing and Internalizing Problems Among Children: A Within-Person Analysis.

OBJECTIVE: In this multi-informant, 3-year longitudinal study, the bidirectional relations between externalizing and internalizing problems were investigated, along with whether peer victimization and academic achievement mediated their relations after separating between-person effects from within-person effects. METHOD: A sample of 3238 Chinese children (55.02% boys; Mage T1 = 9.89 years) reported semiannually on peer victimization and both externalizing and internalizing problems, and parents reported on their children's externalizing and internalizing problems. Students' objective academic achievement data (i.e. final exam scores) were obtained from school records. RESULTS: Random intercepts cross-lagged panel modeling (RI-CLPM) revealed that neither academic achievement nor peer victimization mediated the relations between externalizing and internalizing problems in both self and parent reports at the within-person level. The cross-lagged panel models (CLPM) results supported that peer victimization (but not academic achievement) mediated the relations from internalizing to externalizing problems or externalizing to internalizing problems, whether self-reported or parent-reported. This study also identified meaningful sex differences in focal relations among children. CONCLUSIONS: Findings illustrate the importance of distinguishing within-person and between- person associations, with within- person findings failing to support the hypothesized mediating pathways of the Dual Failure or Acting Out Models among children.

Gender-specific co-developmental trajectories of internalizing and externalizing problems from middle childhood to early adolescence: Environmental and individual predictors.

This study aimed to identify gender-specific co-developmental trajectories of internalizing and externalizing problems from middle childhood to early adolescence, along with key environmental and individual predictors among Chinese youth. A total of 1653 Chinese elementary school students (M age = 9.40; SD = 0.51; 54.57% boys) participated in assessments at six time points, using 6-month assessment intervals. Parallel process latent class growth modeling identified four trajectories for boys: Congruent-low (65.74%), moderate-decreasing internalizing and moderate-stable externalizing problems (18.40%), high increasing-internalizing and low-stable externalizing problems (8.20%), and high decreasing-internalizing and low-stable externalizing problems (7.65%). Three trajectories were identified for girls: Congruent-low (81.09%), moderate co-occurring (7.19%), and high increasing-internalizing and low-stable externalizing problems (11.72%). Multivariate logistic regression analyses revealed that peer victimization served as an environmental risk predictor for the adverse co-developmental trajectories of internalizing and externalizing problems for boys and girls. High sensation-seeking and low self-control served as individual risk variables predicting the trajectories of high increasing-internalizing and low-stable externalizing problems, and low self-control also predicted the trajectories of high decreasing-internalizing and low-stable externalizing problems for boys. The findings highlight the importance of gender differences in understanding the progression of internalizing and externalizing problems and inform effective strategies for prevention and intervention.

Longitudinal Relations Between Child Maltreatment in Families and Psychological Maltreatment by Teachers: The Mediating Roles of Internalizing and Externalizing Problems Among Chinese Children.

Relationships in the family (e.g., child maltreatment in families) and school environments (e.g., psychological maltreatment by teachers) are influential in children's socialization, but how family and teacher-student domains mutually affect each other and which mediating mechanisms are involved in cross-domain spillover at the within-person level are not well understood. This study examined the bidirectional relations between child maltreatment in families and psychological maltreatment by teachers and whether internalizing and externalizing problems functioned as mediators between them after separating between-person effects from within-person effects. A total of 4270 Chinese children (54.9% boys; Mage = 9.92; SD = 0.51) participated in a five-wave longitudinal study with 6-month intervals. Results from random intercept cross-lagged panel modeling mainly found that: (1) Child maltreatment in families predicted psychological maltreatment by teachers, and vice versa; (2) child maltreatment in families influenced psychological maltreatment by teachers through externalizing problems; child maltreatment in families affected the likelihood of psychological maltreatment by teachers via the sequential effect from internalizing problems to externalizing problems at the within-person level; and (3) internalizing and externalizing problems mediated the longitudinal relations from psychological maltreatment by teachers to child maltreatment in families separately. Findings demonstrated bidirectional spillover effects in the domains of family and teacher-student relationships, suggesting that children may be trapped in a vicious cycle of negative relationships through internalizing and externalizing problems, either directly or indirectly. Thus, these two domains influence each other through children's internalizing and externalizing problems. Interventions aimed at addressing maltreatment should include family, school, and individual (i.e., internalizing and externalizing problems) components to prevent a downward spiral.

Profiles and Transitions of Cyberbullying Perpetration and Victimization from Childhood to Early Adolescence: Multi-Contextual Risk and Protective Factors.

Cyberbullying may negatively affect youth's development. Because knowledge of the onset and course of cyberbullying during middle childhood and early adolescence is limited, studies of its antecedents, heterogeneous profiles, and transitions are needed to inform prevention and intervention efforts. The current longitudinal study explored the profiles and transitions of cyberbullying perpetration and victimization from middle childhood to early adolescence, along with their multi-contextual risk and protective factors. A total of 4326 Chinese elementary school students (44.6% female, Mage = 9.94) participated in self-report assessments at four time points with six-month intervals. The profiles and transitions of cyberbullying were modeled using latent profile analysis and latent transition analysis. Three cyberbullying profiles were identified: non-involved, cyberbully-victims, and cybervictims. The findings on the development of cyberbullying showed that: (1) its prevalence rate decreased from middle to late childhood and then increased during the transition to early adolescence; and (2) its stability increased from middle childhood to early adolescence. Multi-contextual risk and protective factors of profile memberships and transitions were also examined. The findings suggested that: (1) family abuse and peer aggression were stable risk factors for cyberbully-victims; (2) high-quality friendships and self-control were stable protective factors for cyberbully-victims; (3) family abuse and depressive symptoms were stable risk factors for cybervictims; and (4) significant predictive effects of family abuse, high-quality friendships, perceived parental warmth, and self-control were found for the transitions in cyberbullying profiles. These results supported multi-contextual models of the development and transitions of cyberbullying in Chinese children.

Joint trajectories of loneliness, depressive symptoms, and social anxiety from middle childhood to early adolescence: associations with suicidal ideation.

This study examined the joint trajectories of loneliness, depressive symptoms, and social anxiety from middle childhood to early adolescence and their associations with suicidal ideation. A total of 643 Chinese elementary school students (55.2% male; Mage = 9.01; SD = 0.75; range = 7 to 11 years at T1) completed measures on six occasions at 6-month intervals. Parallel process latent class growth models revealed five distinct trajectories of loneliness, depressive symptoms, and social anxiety: "congruent-low" (45.1%), "moderately low with predominant loneliness and depressive symptoms" (15.7%), "moderate with predominant loneliness and depressive symptoms" (4.2%), "moderately low with predominant social anxiety" (24.9%), and "congruent-high" (10.1%). The highest suicidal ideation was observed among adolescents who persistently experienced two or three symptoms, followed by those who persistently experienced one predominant symptom, and finally, adolescents who persistently experienced low levels of all three symptoms. The findings highlight the importance of individual differences considerations in understanding the joint patterns of loneliness, depressive symptoms, and social anxiety among youth during the transition into adolescence and the need for more sophisticated intervention programs tailored to the unique characteristics of the relevant trajectories to reduce the risk of suicidal ideation.

Mother-child cohesion, friendship quality, and depressive symptoms in children: Direct and indirect associations between developmental trajectories.

BACKGROUND: Mother-child cohesion and friendship quality have been shown to be protective factors against the development of children's depressive symptoms. However, the possible direct and indirect pathways from these two important interpersonal relationships to children's depressive symptoms need to be further elucidated. Moreover, these associations have not been examined from a developmental perspective. Therefore, this study examined the direct and indirect relations among developmental trajectories of mother-child cohesion, friendship quality, and depressive symptoms in children. METHODS: A total of 4078 Chinese children (45.2 % girls, Mage = 9.90 years, SD = 0.73) participated in assessments at five time points across 2.5 years, employing six-month intervals. Latent growth curve modeling was conducted to examine the direct and indirect relations among the developmental trajectories of mother-child cohesion, friendship quality, and depressive symptoms. RESULTS: The developmental trajectories of both mother-child cohesion and friendship quality were negatively and directly associated with the developmental trajectory of children's depressive symptoms. The developmental trajectory of friendship quality was indirectly associated with the developmental trajectory of depressive symptoms through the mediating role of mother-child cohesion. LIMITATIONS: This study did not investigate father-child cohesion and other important psychological mechanisms linking interpersonal relationships to depressive symptoms. CONCLUSIONS: The findings documented the direct and indirect relations among mother-child cohesion, friendship quality, and depressive symptoms from a developmental perspective, which suggested that prevention and intervention efforts target improving mother-child cohesion and friendship quality to reduce children's depressive symptoms.

Profiles of family maltreatment and peer victimization: Associations with psychosocial adjustment in Chinese children.

BACKGROUND: Although the family and peer systems are both important for children's development, few studies have simultaneously considered the impact of adversity experienced in these systems on children. OBJECTIVE: The first purpose of this study was using latent profile analysis (LPA) to identify profiles of family maltreatment (i.e., physical abuse, emotional abuse, and neglect) and peer victimization (i.e., physical victimization and relational victimization) among Chinese elementary school children. The second purpose was to examine associations between the identified profiles and short-term psychosocial adjustment (i.e., self-esteem, depression symptoms, prosocial behavior, and externalizing behavior). PARTICIPANTS AND SETTING: The sample included 4313 children (45.6 % girls) with an average age of 10.9 years (SD = 0.49) from a large city in China. METHOD: Assessments were conducted on two occasions six months apart. Family maltreatment and peer victimization were assessed at Time 1. Psychosocial adjustment was assessed at Time 2. RESULTS: The potential complexity of children's adversity experiences was revealed in that six profiles of family maltreatment and peer victimization in children were identified: (a) Low-risk; (b) Slight peer victimization; (c) Severe peer victimization; (d) Serious neglect; (e) Severe maltreatment; (f) Doubly disadvantaged. Children in the low-risk profile showed the best psychosocial adjustment whereas children in the doubly disadvantaged profile showed the worst psychosocial adjustment. The findings revealed additional differences in the subsequent psychosocial adjustment of the children in the six profiles. CONCLUSIONS: The identification of multiple profiles and differing relations to psychosocial adjustment implies that interventions should be tailored to members of specific profiles.

Chinese children's heterogeneous friendship quality trajectories: Relations with school adjustment.

Friendships affect children's development and adjustment. This longitudinal study examined the possible heterogeneity and gender differences in the trajectories of children's friendship quality, as well as the relations between distinct friendship quality trajectories and school adjustment. A total of 3,779 Chinese elementary school students (45.5% girls, Mage = 9.94 years, SD = 0.72 at Time 1) completed measures of relevant constructs on five occasions at 6-month intervals. Latent class growth modeling revealed four heterogeneous developmental trajectory classes of friendship quality: high-increasing (49.6%), moderate-decreasing (5.1%), moderate-increasing (31.9%), and low-stable (13.4%). Girls were more likely than boys to fall into the higher friendship quality trajectory classes in reference to the low-stable class. Children in the high-increasing class and low-stable class showed the best and the worst school adjustment, respectively. The identification of four heterogeneous developmental trajectories of friendship quality with differential school adjustment outcomes highlights the importance of intervention programs tailored to specific groups for promoting children's friendship quality and school adjustment. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Transactional processes among perceived parental warmth, positivity, and depressive symptoms from middle childhood to early adolescence: Disentangling between- and within-person associations.

RATIONALE: Previous cross-sectional and unidirectional longitudinal studies have investigated the associations among perceived parental warmth, positivity, and depressive symptoms among children and adolescents without distinguishing between-person effects from within-person effects. OBJECTIVE: The current study aimed to examine the dynamic longitudinal associations among perceived parental warmth, positivity, and depressive symptoms, including whether positivity functioned as a mediator of the reciprocal relations between perceived maternal/paternal warmth and depressive symptoms at the within-person level encompassing middle childhood to early adolescence. METHODS: A sample of 3765 Chinese students (45.8% girls; M age = 9.92 years, SD = 0.72; range = 9-12 years at Time 1) completed self-report measures on 4 occasions across 2 years, using 6-month intervals. Random-Intercept Cross-Lagged Panel Models were employed to disentangle between- and within-person effects. RESULTS: (a) Perceived maternal/paternal warmth and depressive symptoms reciprocally and negatively predicted each other; (b) positivity and depressive symptoms reciprocally and negatively predicted each other; (c) perceived maternal/paternal warmth and positivity reciprocally and positively predicted each other; (d) depressive symptoms indirectly predicted perceived maternal/paternal warmth via positivity; (e) perceived maternal warmth displayed earlier and more stable effects on positivity and depressive symptoms than perceived paternal warmth; and (f), no childhood sex differences existed in the observed associations. CONCLUSIONS: These findings highlight the longitudinal within-person transactions among perceived parental warmth, positivity, and depressive symptoms, and the differential roles of perceived maternal/paternal warmth. These findings may help provide a potential theoretical framework through which to precisely identify objectives for early intervention.

Family and Friends Support and Hope in Chinese Adolescents: The Mediating Effects of Self-Esteem.

Structural modeling was used to investigate presumed antecedents of hope in a community-based sample of Chinese adolescents. Specifically, we evaluated the mediating role of self-esteem in the link between social support from family and friends and individual differences in hope. The Multidimensional Scale of Perceived Social Support, Rosenberg Self-Esteem Scale, and Children's Hope Scale were administered to 1,654 adolescent students (781 boys and 873 girls) from Chinese senior high schools. Social support from family and friends correlated equally with hope levels of participants, demonstrating the importance of both sources of support. Self-esteem fully mediated the relationship between family support and hope and partially (23.6%) mediated the relationship between friends support and hope. Results support a social-cognitive model of the origins of hope among adolescents. Findings also suggest implications for the design of hope-promoting environments for adolescents that extend beyond a focus on the individual to incorporate more comprehensive systemic components, including social support from family and friends. [Journal of Psychosocial Nursing and Mental Health Services, 60(7), 39-46.].

Transactional Processes Among Childhood Maltreatment, Self-Control and Aggression in Early Adolescence: Disentangling Between- and Within-Person Associations.

Previous research has investigated the associations among childhood maltreatment, self-control, and aggression among adolescents without distinguishing between-person effects from within-person effects. Thus, we evaluated the dynamic longitudinal associations among childhood maltreatment, self-control, and aggression, including whether self-control functioned as a mediator of the reciprocal relations between childhood maltreatment and aggression at the within-person level after disentangling between- and within-person associations. A sample of 2050 Chinese early adolescents (43.69% girls, Mage = 10.39 years, SD = 0.55, range = 9 to 12 years at T1) completed measures on 5 occasions across 2.5 years, using 6-month intervals. Random Intercept Cross-Lagged Panel Models were applied to disaggregate between- and within-person effects. RI-CLPMs analysis revealed that at the within-person level: (a) Childhood maltreatment and aggression bidirectionally predicted each other; (b) Childhood maltreatment and self-control bidirectionally predicted each other; (c) Aggression predicted subsequent self-control but not vice versa; (d) Childhood maltreatment did not indirectly predict aggression via self-control and vice versa; (e) Additionally, there were no gender differences observed in the longitudinal associations among childhood maltreatment, self-control and aggression. These findings advanced the literature by elucidating longitudinal associations among childhood maltreatment, self-control, and aggression at the within-person level, highlighting the significance of distinguishing between- and within-person effects in research informing the development of prevention and intervention programs aimed at reducing adolescent aggression.

Perceived Parental Warmth, Peer Perpetration, and Peer Victimization: Unraveling Within-Child Associations from Between-Child Differences.

Although perceived parental warmth and "peer victimization and peer perpetration" are believed to be unidirectionally related, researchers have not examined the possibility of bidirectional relations among them, especially with regard to within-child relations. We thus explored the dynamic longitudinal associations among children's perceived parental warmth (maternal warmth and paternal warmth), peer perpetration, and peer victimization at the within-child level. A total of 3720 Chinese children (Mage = 9.95 years at Time 1, 46.1% girls) were investigated on five occasions, every 6 months. Random Intercept Cross-Lagged Panel Models (RI-CLPMs) were applied to estimate the within-child associations among these variables. The results were: (1) for peer perpetration, peer perpetration inversely predicted subsequent perceived parental warmth, while perceived maternal (but not paternal) warmth inversely predicted subsequent peer perpetration; (2) for peer victimization, perceived maternal and paternal warmth both inversely predicted a child's subsequent peer victimization, and perceived parental warmth and peer victimization bidirectionally predicted each other; and (3) peer perpetration and peer victimization bidirectionally predicted each other. These findings enhance understanding of how perceived parental warmth temporally interrelates with peer perpetration and peer victimization from a positive spillover theory perspective, as well as how peer perpetration temporally interrelates with peer victimization from a negative vicious cycle perspective.