Many developmental theories have not been sufficiently evaluated using designs that control for unobserved familial confounds. Our long-term goal is to determine the causal structure underlying associations between early environmental conditions and later psychosocial and health outcomes. Our overall objective in this study was to further evaluate…

The COVID-19 pandemic has forced children to reckon with the causal relations underlying disease transmission. What are children's theories of how COVID-19 is transmitted? And how do they understand the relation between COVID-19 susceptibility and the need for disease-mitigating behavior? We asked these questions in the context of children's…

The outbreak of the 2019 coronavirus disease (COVID-19) was an unprecedented global public health emergency with a significant psychological toll. This study aimed to understand how specific COVID-19 related stressors contributed to Chinese parents' fear induction practices, and how these practices, in turn, contributed to their children's disease…

Friends are a vital source of social relations throughout the lifespan and across developmental stages. Our knowledge of how friendships develop over time, especially from childhood through adulthood, is limited. Furthermore, it is now recognized that this specific type of relationship influences health across the life course in unique ways. Using…

Exposure to infant crying is a well-established predictor of mothers' mental health. However, this association may reflect many potential mechanisms. Capturing dynamic fluctuations in mothers' states simultaneously with caregiving experiences is necessary to identify the real-time processes influencing mental health. In this study, we leveraged…

Despite the value of sense of purpose during older adulthood, this construct often declines with age. With some older adults reconsidering the relevance of purpose later in life, the measurement of purpose may suffer from variance issues with age. The current study investigated whether sense of purpose functions similarly across ages and evaluated…

The current study tested the developmental significance of both early adolescent sleep quantity and quality for academic competence and internalizing and externalizing problems over the course of 2 years. As part of an accelerated longitudinal study, data were collected from N = 586 Czech adolescents (M[subscript age] = 12.34 years, SD = 0.89,…

Parenting behaviors have long been recognized as crucial to children's healthy development. However, examinations of the etiology of these behaviors are less prevalent. The current study investigated the driving forces behind parental warmth and discipline, particularly whether they are related more to traits within the parent or reactions to…

The present study investigated whether distinct developmental patterns of externalizing behaviors (EBs: hyperactivity-impulsivity, noncompliance, physical aggression) based on parent reports were repeatedly and differentially associated with separate dimensions of internalizing problems such as general anxiety, separation anxiety, and depressive…

Developmental research during COVID-19 suggests that pandemic-related disruptions in family relationships are associated with children's mental health. Most of this research has focused on 1 child per family, thereby obfuscating patterns that are differentially operative at the family-wide (i.e., between-family) versus child-specific (i.e.,…

Peer victimization during the school years can impair victims' mental and physical health even in adulthood. Moreover, some victims of school bullying may also experience revictimization at work as adults. Later revictimization at work may thus at least partly explain (i.e., mediate) the negative consequences of peer victimization in school.…

Developmental science suggests that the consequences of mental health problems for life-course outcomes may depend on the timing of their onset. This study investigated the extent to which mental health predicted educational attainment at ages 17, 20, and 25 and whether gender moderated the links between mental health and educational attainment.…

Parents' behaviors--particularly their emotion socialization behaviors (ESBs)--drive children's emotion socialization (Eisenberg, Cumberland, & Spinrad, 1998). We propose that a major next step in the effort to promote healthy emotional development is to improve the field's understanding of the most proximal contributor to parent ESBs:…

During the COVID-19 pandemic, many families experienced financial and health stressors associated with parental employment. Using multi-informant and daily-diary data from a nationwide U.S. sample of parents and children (626 dyads; 18,780 daily assessments across 30 days: May 18, 2020-June 1, 2020, October 19, 2020-November 2, 2020; parents:…

The detrimental effects of discrimination are well documented; however, the influence of ethnic/racial identity (ERI) on this association is equivocal. There is theoretical and empirical support for both protective and detrimental effects of ERI. This meta-analysis includes 53 effect sizes from 51 studies and 18,545 participants spanning early…