LONGITUDINAL ASSOCIATIONS BETWEEN SLEEP FUNCTIONING AND ADOLESCENT ADJUSTMENT

The current dissertation consists of three interrelated studies examining the relationship between sleep functioning and adolescent adjustment. Although links between sleep patterns and internalizing problems and externalizing or problem behaviors in children and adolescents have been established in literature, several gaps remain in this research. This dissertation addressed these by: (a) testing sleep problems, quantity, and chronotype in childhood as predictors of internalizing problems in adolescence (Study 1), (b) testing sleep problems, quantity, and chronotype in childhood as predictors of problem behaviors in adolescence (Study 2), and (c) testing sleep problems and quantity as mediators of the chronotype-adjustment link (Study 3). Latent Growth Modeling (LGM) and Half-longitudinal Path Analysis were used to carry out these studies using a large sample of children part of the European Longitudinal Study of Pregnancy and Childhood (ELSPAC). Findings from Study 1 and 2 showed that greater sleep problems in early childhood and their slower decrease during childhood predicted higher levels of internalizing problems and problem behaviors in early adolescence. Furthermore, lower sleep quantity in early childhood predicted higher internalizing problems and problem behaviors in early adolescence and a greater increase in problem behaviors in adolescence. Lastly, greater eveningness in early childhood predicted greater increases in problem behaviors during adolescence. Results of Study 3 provided evidence that evening chronotype longitudinally predicted less favorable sleep patterns, including greater sleep problems and lower sleep quantity. However, only sleep problems significantly predicted measures of adjustment, particularly internalizing problems; no effects of sleep quantity on adjustment were found

On the Development of Self-Control and Deviance from Preschool to Middle Adolescence

Purpose The study tested whether developmental changes in self-control stabilize by late childhood (age 10) or continue into early and middle adolescence. Second, it tested the bidirectional, longitudinal relationship between self-control and deviance over an 11-year period. Methods Children (N = 1159) from the longitudinal NICHD Study of Early Child Care and Youth Development (SECCYD) were assessed six times, ages 4.5 to 15 years. Latent growth models tested self-control and deviance trajectories, using competing growth functions to capture change over time. The longitudinal, bidirectional self-control-deviance links were examined in a cross-lagged latent model. Results Findings showed that children\u27s self-control significantly increased during childhood, but stabilized sometime between 8.5 and 10.5 years. Deviance also changed in parallel, but in the opposite direction; some evidence was found of continued change in deviance during early adolescence. Finally, self-control and deviance were bidirectionally and longitudinally linked across all assessments through childhood only. Conclusions Findings support theoretical predictions that self-control principally develops during childhood (by age 10) and subsequently remains stable. They also support longitudinal, bidirectional self-control-deviance links, largely identical in size prior to the age of 10; study findings are contextualized vis-à-vis self-control theory as well as recent behavior genetic evidence

Psychological Distress Among Older Adults During the First Wave of SARS-CoV-2 Pandemic: Survey of Health, Ageing, and Retirement in Europe

Objective: To investigate the individual and country-level characteristics associated with the presence and worsening of psychological distress during the first wave of the pandemic among the elderly in Europe. Methods: In June-August 2020, 52,310 non-institutionalized people aged 50+ in 27 SHARE participating countries reported whether feeling depressed, anxious, lonely, and having sleep problems. For this analysis, we combined these symptoms into a count variable reflecting psychological distress. Binary measures of the worsening of each symptom were used as secondary outcomes. Multilevel zero-inflated negative binomial and binary logistic regressions were used to assess the associations. Results: Female sex, low education, multimorbidity, fewer social contacts, and higher stringency of policy measures were associated with increased distress. The worsening of all 4 distress symptoms was associated with younger age, poor health, loss of work due to the pandemic, low social contact, and high national mortality rates from COVID-19. Conclusion: The pandemic exacerbated distress symptoms for socially disadvantaged older adults and those who were already struggling with mental health. The death toll of COVID-19 in a country played a role in symptom worsening

Prenatal psychosocial stress and children's sleep problems: Evidence from the ELSPAC-CZ study

Prenatal exposure to maternal stress may increase the risk of developing sleep problems in childhood. This study examined the association between prenatal stressful life events (PSLE) and children’s sleep problems, taking into consideration their trajectory over time. Data were obtained from the Czech portion of the European Longitudinal Cohort Study of Pregnancy and Childhood (ELSPAC-CZ; N = 4,371 children). Mothers reported PSLE using an inventory of 42 life events and child sleep problems at five time-points (child age of 1.5, 3, 5, 7, and 11 years). The association was tested by a Poisson latent growth model, controlling for maternal and family demographics, birth characteristics, maternal depression, and alcohol use in pregnancy. The average rate of sleep problems was 2.06 (p < 0.001) at the age of 1.5 years and the rate of sleep problems decreased in a linear fashion over time (estimate = −0.118; p < 0.001). A higher number of PSLE was associated with a higher rate of sleep problems at the age of 1.5 years (incidence rate ratio [IRR] per interquartile range = 1.08, 95% confidence interval [CI] 1.05–1.12, p < 0.001) and with a reduced rate of decrease in sleep problems between the ages of 1.5 and 11 years (p < 0.001). Thus, PSLE were associated with chronicity of sleep problems in addition to their amount during early childhood. Prenatal exposure to stress may predispose individuals to the development of sleep problems in later life

Cross-National Associations Among Cyberbullying Victimization, Self-Esteem, and Internet Addiction: Direct and Indirect Effects of Alexithymia

The relationship among cyberbullying victimization, lower self-esteem, and internet addiction has been well-established. Yet, little research exists that explains the nature of these associations, and no previous work has considered the inability to identify or describe one’s emotions, namely, alexithymia, as a potential mediator of these links. The present study sought to investigate the indirect effects of cyberbullying victimization on self-esteem and internet addiction, mediated by alexithymia. The sample consisted of 1,442 participants between 12 and 17 years (Mage = 14.17, SD = 1.38, 51.5% male) from Germany, the Netherlands, and the United States. Results showed a direct relationship between cyberbullying victimization and self-esteem and an indirect association mediated by alexithymia in the Dutch sample. However, in the German and U.S. samples, only an indirect relationship via alexithymia, but not a direct effect of cyberbullying victimization on self-esteem, was found. Consistent across the three country samples, cyberbullying victimization and internet addiction were directly and also indirectly associated via alexithymia. In sum, findings indicate that alexithymia might help better understand which detrimental effects cyberbullying victimization has on adolescent psychological health. Thus, cyberbullying prevention programs should consider implementing elements that educate adolescents on the ability to identify and describe their own emotions

A cross-national study of direct and indirect effects of cyberbullying on cybergrooming victimization via self-esteem

The present study reports frequency rates of cybergrooming, profiled characteristics of cybergrooming perpetrators, and examine direct and indirect associations between cyberbullying victimization, self-esteem, and cybergrooming victimization. The study sample included 2,162 adolescents between 11 and 19 years from three Western (Germany, the Netherlands, the United States) countries and one Southeast Asian country (Thailand). Across countries, 18.5% of participants reported having had contact with a cybergroomer. Western girls, as compared to boys, were at greater risk to have been contacted by a cybergroomer. No significant sex difference was found for Southeast Asian adolescents. Also, Southeast Asian adolescents reported higher rates of cybergroomer contact as compared to Western adolescents. Cybergroomers were most often males and older than victims. Both cyberbullying victimization and low self-esteem increased the probability of coming into contact with a cybergroomer, and self-esteem mediated the effects of cyberbullying victimization on cybergrooming victimization. The results are discussed in relation to practical implications and future research

Cross-National Associations Among Cyberbullying Victimization, Self-Esteem, and Internet Addiction

The relationship among cyberbullying victimization, lower self-esteem, and internet addiction has been well-established. Yet, little research exists that explains the nature of these associations, and no previous work has considered the inability to identify or describe one’s emotions, namely, alexithymia, as a potential mediator of these links. The present study sought to investigate the indirect effects of cyberbullying victimization on self-esteem and internet addiction, mediated by alexithymia. The sample consisted of 1,442 participants between 12 and 17 years (Mage = 14.17, SD = 1.38, 51.5% male) from Germany, the Netherlands, and the United States. Results showed a direct relationship between cyberbullying victimization and self-esteem and an indirect association mediated by alexithymia in the Dutch sample. However, in the German and U.S. samples, only an indirect relationship via alexithymia, but not a direct effect of cyberbullying victimization on self-esteem, was found. Consistent across the three country samples, cyberbullying victimization and internet addiction were directly and also indirectly associated via alexithymia. In sum, findings indicate that alexithymia might help better understand which detrimental effects cyberbullying victimization has on adolescent psychological health. Thus, cyberbullying prevention programs should consider implementing elements that educate adolescents on the ability to identify and describe their own emotions