Aim: To study the longitudinal relationship between loneliness and quality of life (QoL) in adults to identify key mechanisms to better design future psychosocial interventions. Method: 13,222 participants from three consecutive waves of the Survey of Health, Ageing, and Retirement in Europe (SHARE), aged 65 or older, 56.3% women. They were analyzed using cross-lagged panel model (CLPM), random intercept cross-lagged panel model (RI-CLPM), and multi-group models disaggregated by gender. Results: The RI-CLPM provided a better fit than the CLPM. Both models showed the stability of QoL and loneliness. All autoregressive paths were significant, and a negative association between concurrent QoL and loneliness was observed across all waves. The CLPM supported a reciprocal relationship, while the RI-CLPM only confirmed the effects of loneliness on QoL. Women reported higher levels of loneliness and poorer QoL, but no gender differences were identified in the longitudinal association. Conclusions: Addressing loneliness in early stages could be a better preventive measure to promote quality of life in both genders.

BACKGROUND: This study explores whether the impact of environmental factors (community services usage, CSU) on geriatric depression is mediated by psychological resilience and moderated by the COMT (catechol-O-methyltransferase) gene val158met polymorphism.
METHODS: The data consists of 13,512 entries from the Chinese Longitudinal Healthy Longevity Survey (CLHLS) collected in the years 2008, 2011, 2014, and 2018. The study employed a Random Intercept Cross-Lagged Panel Model (RI-CLPM) to examine the relationship between CSU and geriatric depression, including the mediating effect of psychological resilience and the moderating role of the comt gene val158met gene polymorphism in this relationship.
RESULTS: Lower CSU at earlier assessments were significantly associated with more severe geriatric depression in subsequent evaluations.Psychological resilience was found to partially mediate the relationship between CSU and depression.Differential impacts were observed among various gene genotypes; specifically, the val genotype demonstrated a significantly greater influence of CSU on subsequent psychological resilience and on subsequent depression compared to the met genotype.
CONCLUSIONS: Enhancement in CSU can predict subsequent geriatric depression. The relationship between the CSU and depression can be mediated by psychological resilience, with genetics modulating the pathway from CSU through psychological resilience to depression. Multidisciplinary interventions focused on enhancing community service quality, boosting psychological resilience, and mitigating depression are likely to benefit the older adults\'s emotional and psychological well-being.

Although previous studies have shown a close relationship between gaming disorder and depressive symptoms, few have measured normal videogame use, symptoms of gaming disorder, and depressive symptoms concurrently. The longitudinal dynamics between these variables remain unclear. This study used two demographic cohorts to examine the longitudinal relationship between gaming and depressive symptoms: children (n = 1513, 46.9% girls, Mage ± SD = 9.63 ± 0.58 years) and adolescents (n = 1757, 48.5% girls, Mage ± SD = 12.55 ± 0.70 years). Random intercept cross-lagged panel models (RI-CLPMs) were employed to distinguish between within- and between-person levels of gaming and depressive symptoms. The RI-CLPM results showed a stable link between symptoms of gaming disorder and depression at the between-person level for both children and adolescents. At the within-person level, among children, depressive symptoms positively predicted subsequent gaming disorder symptoms, but gaming disorder symptoms were not a significant predictor of depressive symptoms at this level. Among adolescents, there was no significant cross-lagged effect between symptoms of gaming disorder and depression at the within-person level. Additionally, there was no significant cross-lagged effect between normal videogame use and depressive symptoms in either cohort. These results highlight the different effects of normal videogame use and gaming disorder symptoms associated with depressive symptoms. The different effects on children and adolescents underscore the importance of considering the different developmental stages in the study of gaming and mental health outcomes.

Although many cross-sectional studies showed that psychotic experiences (PEs) and dissociation were closely related, the longitudinal association between them remains unknown. Therefore, the aim of the current study was to examine the longitudinal association of these two symptoms throughout adolescence, under the hypothesis that these two symptoms are bidirectionally associated. Data were obtained from a population-based cohort, the Tokyo Teen Cohort study (TTC; N = 3171). PEs and dissociation were assessed at 10, 12, 14, and 16 years of age. PEs were assessed using a total score from five-item self-report questionnaires derived from the Diagnostic Interview Schedule for Children (DISC-C). Dissociation was assessed using subscale scores of the Child Behavior Checklist (CBCL) completed by primary caregivers. We examined the longitudinal relationship between PEs and dissociation using the random intercept cross-lagged panel model (RI-CLPM). The within-person component of the RI-CLPM revealed no significant cross-lagged effect of dissociation on PEs at any time point. On the other hand, there was a significant (p < 0.05) association between PEs at age 14 and dissociation at age 16 (β = 0.106, 95 % CI 0.047-0.165). The between-person component revealed a significant time-invariant relationship between the two symptoms (β = 0.324, 95 % CI 0.239-0.410). The longitudinal relationship between PEs and dissociation was limited at the within-person level, whereas the between-person correlation was significant. The only significant longitudinal pathway was from PEs to dissociation, suggesting that PEs may be a predictor of dissociation in mid-adolescence.

BACKGROUND: Although research has demonstrated that parental psychological control is associated with the subjective well-being of adolescents, the lack of longitudinal studies that investigate whether or not bidirectional associations exist between the two and their potential mediating mechanisms has continued to date. In addition, previous studies have not rigorously distinguished between- and within-person effects. Thus, this study investigated longitudinal bidirectional associations between parental psychological control and the subjective well-being of adolescents. The study further examined the mediating role of emotion regulation ability.
METHODS: A total of 1365 Chinese adolescents (boys: 53.2 %; Mage = 14.68 years, SD = 1.56) participated in a three-wave longitudinal study with annual assessments. Random intercept cross-lagged panel models were utilized to separate between- and within-person variation.
RESULTS: After controlling for between-person variance, the results revealed that adolescents with low levels of subjective well-being reported high levels of parental psychological control after one year. Emotion regulation ability played a bidirectional mediating role in the relationship between psychological control and subjective well-being. That is, psychological control and subjective well-being mutually influenced each other through emotion regulation ability.
CONCLUSIONS: Assessments of the key study variables were provided by adolescents. Moreover, the study considered a combination of the mothers\' and fathers\' use of psychological control without differentiating between paternal and maternal psychological control.
CONCLUSIONS: The findings highlight the importance of interventions that target emotion regulation ability, which contributes to breaking the negative cycle between controlling parenting and the well-being of adolescents.

Children who engage more in classroom instruction tend to also have higher levels of academic achievement relative to their peers who engage less. Although research has clearly established an association between such learning behaviors and academic achievement, the directionality of this relationship, and the possibility of bidirectional relations, remain unclear. It is possible that this lack of clarity stems from the fact that interrelationships between achievement and learning behaviors may differ across student-teacher relationship contexts. We evaluated this possibility using a large nationally representative sample of kindergarten to third grade students (N = 2010) from the Early Childhood Longitudinal Study-Kindergarten Cohort of 2011. Using latent profile moderation analyses, we identified three profiles of student-teacher relationships across kindergarten through third grade students: (a) Close (68%), (b) Conflictual (16%), and (c) Uninvolved (16%). Our follow-up models identified bidirectional relations that differed across these profiles, indicating more robust bidirectional learning behavior-achievement interrelationships in the Close profile and more unidirectional achievement to learning behavior relations in the Conflictual and Uninvolved profiles. These findings illustrate how differences in environmental contexts impact the relationship between students\' learning behaviors and their achievement. Future studies should consider contextual influences when investigating children\'s academic growth processes and developing interventions.

Criminal offending and mental health problems often co-occur. This study examined competing models to understand bidirectional associations between crime and mental health problems over time among at-risk men in the U.S. It was hypothesized that there would be significant cross-lagged associations of offending and mental health problems in early adulthood. Longitudinal data were drawn from 206 at-risk men enrolled in the Oregon Youth Study. Random intercept cross-lagged models examined bidirectional associations between mental health problems (assessed with the 53-item Brief Symptom Inventory) and self-reported offending in early adulthood across 6 time points from ages 19-20 to 29-30 years. Sociodemographic factors, prior levels, and common risk factors (i.e., parents\' criminality, mental health problems, and socioeconomic status, as well as child age, antisocial propensity, and internalizing behaviors) were controlled during analysis. A robust association between mental health problems and offending was found for the early adult period, especially for total and violence offenses. Findings did not support the hypothesized positive cross-lagged effects. Instead, two cross-lagged effects emerged indicating that offending was inversely related to subsequent mental health problems. Childhood antisocial propensity and internalizing behaviors emerged as important predictors of stable between-person level differences in offending and mental health problems, respectively, although results differed as a function of offense categories (total, violence, property, drug). Findings indicate that the relation between mental health problems and offending is unidirectional, temporal, and partially spurious. Preventing child internalizing behaviors and child antisocial behaviors holds promise for reducing early adult mental health problems and offending.

Despite extensive research on the psychological impacts of digital technology, the nuanced dynamics between adolescent loneliness and problematic smartphone use, particularly across different educational levels and genders, remain underexplored. This study aims to fill this gap by employing a Random Intercept Cross-Lagged Panel Model to dissect the bidirectional relationship between loneliness and problematic smartphone use among adolescents, with a focus on the moderating roles of educational levels and gender. Engaging 3132 students from various educational institutions in China, the research conducted a three-wave longitudinal analysis across 2022-2023. The final number of participants included 1120 adolescents (53.5% female; age in 2022: M = 14.57 years, SD = 1.57). Results reveal that loneliness significantly predicts problematic smartphone use, but not vice versa, highlighting a unidirectional influence. The study uncovers crucial differences across educational levels and gender, emphasizing the stronger effect of loneliness on problematic smartphone use among junior high students and female adolescents. These findings underscore the complexity of adolescent loneliness and its relationship with digital behavior, suggesting a need for tailored interventions considering both gender and developmental stages.

OBJECTIVE: This study aimed to explore the bidirectional association between frailty and social relationships in older adults while distinguishing between interpersonal and intrapersonal effects.
METHODS: A prospective cohort study of community-dwelling older adults was conducted in Japan in three waves spanning six years with follow-ups in every three years. Random intercept cross-lagged panel model was used to explore temporal associations between frailty and social relationships.
RESULTS: Data for 520 participants (mean age 73.02 [SD 6.38] years, 56.7% women) were analyzed. Across individuals, frailty was associated with social relationships (β = -0.514, p < 0.001). At the interpersonal level, frailty was cross-sectionally associated with social relationships separately at T1(β = -0.389, p < 0.01), T2 (β = -0.343, p < 0.001) and T3 (β = -0.273, p < 0.05). Moreover, social relationships were associated with subsequent increases in symptoms of frailty in all measurement waves (β = -0.332, p < 0.001; β = -0.169, p < 0.01) and vice versa (β = -0.149, p < 0.05; β = -0.292, p < 0.001).
CONCLUSIONS: The results suggest that frailty was associated with lower levels of social relationships. Frailty improvement programs can be combined with interventions to enhance social relationships, which will be beneficial in preventing frailty. The results emphasize the importance of combining clinical treatments of frailty with interventions to improve social relationships.

Despite growing concerns regarding the development of gaming disorder symptoms among adolescents, the longitudinal relationship between school factors and gaming disorder symptoms remains far from being fully understood. This two-year longitudinal study examined the relationship between school climate perceptions, academic achievement, and gaming disorder symptoms among three distinct demographic cohorts: preadolescents (n = 1513; 46.9% girls, Mage = 10.64 years, SD = 0.56), early adolescents (n = 1771; 48.3% girls, Mage = 13.54 years, SD = 0.70), and late adolescents (n = 2385; 50.1% girls, Mage = 16.41 years, SD = 0.59). A four-wave study was conducted (six months apart) using random intercept cross-lagged panel models (RI-CLPMs) to separate the within-person (state level) from the between-person (trait level) effects. The results obtained from the RI-CLPMs indicated that fluctuations in school climate perceptions negatively predicted subsequent changes in gaming disorder symptoms among preadolescents at the within-person level, but not among early and late adolescents. Fluctuations relating to gaming disorder symptoms also negatively predicted subsequent changes regarding academic achievement in late adolescents, but not in preadolescents and early adolescents. The effect of school-related factors on gaming disorder symptoms varies across different developmental stages. While preadolescents may represent a particularly susceptible subgroup for gaming disorder in terms of being predicted by their school environment, late adolescents appear to be more vulnerable to predictors of gaming disorder symptoms. The current study also discusses the implications of school-wide programs aimed at improving school climate and preventing the development of gaming disorder symptoms during key developmental periods.