Contributions of mothers' and fathers' parenting to children's self-regulation: Evidence from an adoption study

Relationship between maternal grit and effortful control among 18-21-month-old toddlers

Grit is known to be effective for long-term academic and social success. However, few studies have focused on the role of grit in parenting and its effect on the development of grit in children. Therefore, this study investigated the effect of maternal grit on children's effortful control (EC), which is thought to be a precursor to grit, using parenting as a mediating factor. Participants in the current study were 412 children (age range: 18-21 months, M = 34.67 months, SD = 4.51 months) and their mothers. We assessed maternal grit, parenting style, maternal EC, and child EC, and found that maternal grit, maternal EC, and parenting style were positively correlated with child EC. Furthermore, maternal grit was related to EC in children not only directly, but also indirectly through responsive parenting. Additionally, maternal grit was found to be directly related to child EC only when assessed separately from maternal EC. The current study's findings suggest that maternal grit is directly related to EC in children in a way that differs from the mother's EC in child-rearing situations.

Longitudinal associations between specific types of emotional reactivity and psychological, physical health, and school adjustment

Using a multimethod, multiinformant longitudinal design, we examined associations between specific forms of positive and negative emotional reactivity at age 5, children's effortful control (EC), emotion regulation, and social skills at age 7, and adolescent functioning across psychological, academic, and physical health domains at ages 15/16 (N = 383). We examined how distinct components of childhood emotional reactivity directly and indirectly predict domain-specific forms of adolescent adjustment, thereby identifying developmental pathways between specific types of emotional reactivity and adjustment above and beyond the propensity to express other forms of emotional reactivity. Age 5 high-intensity positivity was associated with lower age 7 EC and more adolescent risk-taking; age 5 low-intensity positivity was associated with better age 7 EC and adolescent cardiovascular health, providing evidence for the heterogeneity of positive emotional reactivity. Indirect effects indicated that children's age 7 social skills partially explain several associations between age 5 fear and anger reactivity and adolescent adjustment. Moreover, age 5 anger reactivity, low-, and high-intensity positivity were associated with adolescent adjustment via age 7 EC. The findings from this interdisciplinary, long-term longitudinal study have significant implications for prevention and intervention work aiming to understand the role of emotional reactivity in the etiology of adjustment and psychopathology.

Using the Flanker Task to Examine Genetic and Environmental Contributions in Inhibitory Control Across the Preschool Period

The limited research exploring genetic and environmental influences on inhibitory control (IC) in preschoolers has relied on parent ratings or simple delay tasks and has produced mixed results. The present study uses a cognitively-challenging Flanker task to examine genetic and environmental contributions to the development of early IC in a longitudinal sample of 310 same-sex twin pairs (123 MZ; 187 DZ; 51% female) assessed at ages 3, 4 and 5 years. IC was significantly heritable at each age (a²: age 3 = .36; age 4 = .36; age 5 = .35). Stability was entirely accounted for by genetic influences, and change was explained by genetic and nonshared environmental factors. No significant shared environmental influences were observed.

Child Cognitive Flexibility and Maternal Control: A First Step toward Untangling Genetic and Environmental Contributions

Executive functions (EF) play an essential role in many spheres of child development. Therefore, it is crucial to get a better understanding of their etiology. Using a genetic design that involved 934 twins (400 monozygotic), this study examined the etiology of cognitive flexibility, a component of EF, at 5 years of age and its phenotypic and etiological associations with maternal control. Cognitive flexibility was measured in a laboratory setting at 5 years of age using a well-known EF-task, i.e. the Dimensional Change Card Sort (DCCS). Maternal control was measured using a self-report questionnaire. The univariate genetic model demonstrated that environmental factors mainly explained individual differences in preschoolers' performance on the DCCS task. A bivariate genetic model demonstrated that non-shared environmental mechanisms mainly explained the association (r = .-13) between maternal control and children's performance on the DCCS task. This study represents a preliminary step toward a better understanding of the genetic and environmental contributions underlying the relation between parenting behaviors and children's EF.

Infants' attachment security and children's self-regulation within and outside the parent-child relationship at kindergarten age: Distinct paths for children varying in anger proneness

Research in developmental psychology has robustly documented positive associations between parent-child attachment security and the child's self-regulation (SR). This study of 102 community mothers, fathers, and infants contributes to that research by examining the role of attachment security, observed at 15 months using the Attachment Q-Set, as a predictor of two distinct aspects of self-regulation at 67 months: executive functioning (SR-EF), observed in abstract Stroop-like tasks (Day/Night & Snow/Grass and Tapping), and parent-related (SR-PR), observed within the context of the parent-child relationship in response to the mother's (SR-MR) and father's (SR-FR) requests and prohibitions. We also examined child anger proneness, observed at 7 months, as a moderator of those associations. In both mother-child and father-child dyads, child security predicted SR-EF; More secure children performed better in executive functioning tasks. In mother-child dyads, security also predicted SR-MR, but the effect was qualified by the interaction of security and anger proneness, such that the effect was significant only for highly anger-prone children. The effect reflected differential susceptibility: Compared with lower-anger peers, highly anger-prone children developed worse SR-MR if their security was low, but they developed better SR-MR if their security was high. The findings highlight the benefits of a nuanced approach to self-regulation, considering child individuality as interacting with security and examining processes in both mother-child and father-child dyads.

The role of parenting in the intergenerational transmission of executive functioning: A genetically informed approach

Deficits in executive functioning both run in families and serve as a transdiagnostic risk factor for psychopathology. The present study employed twin modeling to examine parenting as an environmental pathway underlying the intergenerational transmission of executive functioning in an at-risk community sample of children and adolescents (N = 354 pairs, 167 monozygotic). Using structural equation modeling of multi-informant reports of parenting and a multi-method measure of child executive functioning, we found that better parent executive functioning related to less harsh, warmer parenting, which in turn related to better child executive functioning. Second, we assessed the etiology of executive functioning via the nuclear twin family model, finding large non-shared environmental effects (E = .69) and low-to-moderate heritability (A = .22). We did not find evidence of shared environmental effects or passive genotype-environment correlation. Third, a bivariate twin model revealed significant shared environmental overlap between both warm and harsh parenting and child executive functioning (which may indicate either passive genotype-environment correlation or environmental mediation), and non-shared environmental overlap between only harsh parenting and child executive functioning (indicating an effect of harsh parenting separable from genetic confounds). In summary, genetics contribute to the intergenerational transmission of executive functioning, with environmental mechanisms, including harsh parenting, also making unique contributions.

The Special Role of Middle Childhood in Self-Control Development: Longitudinal and Genetic Evidence

Despite the importance of self-control for well-being and adjustment, its development from early childhood to early adolescence has been relatively understudied. We addressed the development of mother-reported self-control in what is likely the largest and longest longitudinal twin study of the topic to this day (N = 1,889 individual children with data from at least one of 5 waves: ages 3, 5, 6.5, 8-9 and 11 years). We examined rank-order change in self-control from early childhood to early adolescence, genetic and environmental contributions to variance in the trait and differential developmental trajectories. The relative contribution of genetic and environmental factors to change and stability was also examined. Results point at middle childhood as a period of potential transition and change. During this period the rank-order stability of self-control increases, heritability rates substantially rise, and a cross-over occurs in two of the self-control trajectories. Non-additive genetic effects contribute to both stability and change in self-control while the non-shared environment contributes mostly to change, with no effect for the shared environment. Our findings suggest that new genetic factors, that emerge around age 6.5 and whose effect on self-control is carried on along development, may partially account for changes in self-control around late middle childhood, and explain the growing stability in the trait approaching early adolescence. We discuss the implications of the special role of middle childhood for self-control development. This article is protected by copyright. All rights reserved.

Parenting in the Context of the Child: Genetic and Social Processes

The focus on the role of parenting in child development has a long-standing history. When measures of parenting precede changes in child development, researchers typically infer a causal role of parenting practices and attitudes on child development. However, this research is usually conducted with parents raising their own biological offspring. Such research designs cannot account for the effects of genes that are common to parents and children, nor for genetically influenced traits in children that influence how they are parented and how parenting affects them. The aim of this monograph is to provide a clearer view of parenting by synthesizing findings from the Early Growth and Development Study (EGDS). EGDS is a longitudinal study of adopted children, their birth parents, and their rearing parents studied across infancy and childhood. Families (N = 561) were recruited in the United States through adoption agencies between 2000 and 2010. Data collection began when adoptees were 9 months old (males = 57.2%; White 54.5%, Black 13.2%, Hispanic/Latinx 13.4%, Multiracial 17.8%, other 1.1%). The median child age at adoption placement was 2 days (M = 5.58, SD = 11.32). Adoptive parents were predominantly in their 30s, White, and coming from upper-middle- or upper-class backgrounds with high educational attainment (a mode at 4-year college or graduate degree). Most adoptive parents were heterosexual couples, and were married at the beginning of the project. The birth parent sample was more racially and ethnically diverse, but the majority (70%) were White. At the beginning of the study, most birth mothers and fathers were in their 20s, with a mode of educational attainment at high school degree, and few of them were married. We have been following these family members over time, assessing their genetic influences, prenatal environment, rearing environment, and child development. Controlling for effects of genes common to parents and children, we confirmed some previously reported associations between parenting, parent psychopathology, and marital adjustment in relation to child problematic and prosocial behavior. We also observed effects of children's heritable characteristics, characteristics thought to be transmitted from parent to child by genetic means, on their parents and how those effects contributed to subsequent child development. For example, we found that genetically influenced child impulsivity and social withdrawal both elicited harsh parenting, whereas a genetically influenced sunny disposition elicited parental warmth. We found numerous instances of children's genetically influenced characteristics that enhanced positive parental influences on child development or that protected them from harsh parenting. Integrating our findings, we propose a new, genetically informed process model of parenting. We posit that parents implicitly or explicitly detect genetically influenced liabilities and assets in their children. We also suggest future research into factors such as marital adjustment, that favor parents responding with appropriate protection or enhancement. Our findings illustrate a productive use of genetic information in prevention research: helping parents respond effectively to a profile of child strengths and challenges rather than using genetic information simply to identify some children unresponsive to current preventive interventions.

Resident and Non-resident Father Involvement, Coparenting, and the Development of Children's Self-Regulation Among Families Facing Economic Hardship

Self-regulation, or the ability to effectively manage emotions and behavior, is a critical skill to develop in early childhood. Children living in a context of economic hardship are at an increased risk for developing self-regulation difficulties. However, few studies have comprehensively examined how multiple aspects of the caregiving environment, including fathers' parenting and coparenting quality, may contribute to child self-regulation. Thus, this study applied a family systems perspective to examine whether coparenting and resident and non-resident fathers' reports of parenting quantity and quality were associated with observations of children's self-regulation. Participants were drawn from the Embedded Developmental Study (n = 257) of the Three-City Study, a longitudinal study of children and families facing economic hardship. At Wave 1, when children were 2-4 years old, reports of parenting (i.e., quantity and quality) and coparenting (i.e., support) were obtained. At Wave 2, when children were 3-6 years old, children participated in a snack delay and gift wrap task, which assessed their self-regulation. Multi-group path analyses indicated that resident fathers' harsh parenting at Wave 1 predicted decreased levels of self-regulation at Wave 2. Non-resident fathers' reported hours of involvement at Wave 1 predicted greater levels of self-regulation at Wave 2. Additionally, supportive coparenting among families with a non-resident father predicted greater self-regulation. Supportive coparenting was not associated with child self-regulation in families with a resident father. The implications for research focused on facilitating positive father-child relationships in diverse family contexts are discussed.

Gene × Environment Interactions in the Development of Preschool Effortful Control, and Its Implications for Childhood Externalizing Behavior

This study examined the role of gene × environment interaction (G × E) in the development of effortful control (EC) and externalizing symptoms (EXT). Participants included 361 adopted children, and their Adoptive Parents (APs) and Birth Mothers (BMs), drawn from the Early Growth and Development Study. The primary adoptive caregivers' (AP1) laxness and overreactivity were assessed when children were 27-months-old, and used as indices of environmental influences on EC. Heritable influences on child EC were assessed by the BMs' personality characteristics (emotion dysregulation, agreeableness). Secondary adoptive caregivers (AP2) reported on children's EC at 54 months, and EXT at 7 years. Interactions between BM characteristics and AP1 laxness were related to EC and indirectly predicted EXT via EC. Parental laxness and EC were positively associated if children had high heritable risk for poor EC (BM high emotion dysregulation or low agreeableness), but negatively associated if children had low heritable risk for poor EC (BM low emotion dysregulation or high agreeableness). BM agreeableness also moderated associations between AP1 overreactivity and effortful control, and yielded a similar pattern of results. Our findings suggest that G × E is an important first step in the development of EXT via its effect on EC. Consistent with "goodness of fit" models, heritable tendencies can affect which parenting practices best support EC development.

Technology-Assisted Parenting Interventions for Families Experiencing Social Disadvantage: a Meta-Analysis

Technology-assisted interventions have been identified as a means to increase accessibility and enhance engagement of parenting programs. The current meta-analytic review examines the effectiveness of these interventions in families experiencing social disadvantage. A literature search was conducted spanning March 2007-June 2019. Nine studies met inclusion criteria (total of 864 participants) which included an evaluation of a parenting intervention for families with at least one of the following demographic challenges, low socioeconomic status, single parenthood, and/or young parenthood. Interventions (or a component of the intervention) were delivered by computer, cell phone, smartphone, and/or tablet. Data were organized into three categories: parental psychological well-being (e.g., self-esteem, social support), parenting (e.g., observed or self-reported parenting behavior), and child behavior (e.g., disruptive behavior). Effect sizes (Hedges' g) were calculated and moderators (i.e., contact with an interventionist, intervention length, publication year, % female parents, mean parent age, parental education, % minority, and child age) were examined through Q-statistics and meta-regression, as appropriate. Intervention showed a near-significant impact on parental psychological well-being (g = .35, p = .051). Furthermore, interventions that did not include direct contact with an interventionist showed no evidence of effectiveness (g = - .02); interventions that incorporated contact were significantly more effective (g = .68). In addition, intervention length moderated intervention effectiveness; shorter interventions yielded greater improvements in well-being, compared with longer interventions. Interventions were also associated with significant improvements in parenting (g = .38) and child behavior (g = .39). These findings provide support for the use of technology-assisted parenting interventions in populations experiencing social disadvantage.

Co-occurring risk and protective factors and regulatory behavior of infants living in low-income homes

Early self-regulation is a foundation for lifelong wellness and can be shaped by the interplay among several vital exposures. In this study, we examined the emergence of reliable profiles based upon exposure to risk and protective factors in infancy, determined if sociodemographic resources predict profile membership, and determined if these profiles predict early regulatory behaviors in a sample of infants reared in low-income homes. Data were collected from a sample of primarily Black or White mother-infant dyads living in low-income homes in the Midwest (n = 222) during the infants' first year of life (mean maternal age at enrollment: 26.29 years; range 18-43 years). Exposures included mother-infant interactions; father support; maternal depression, stress, and self-efficacy; home environment; food security; and breastfeeding duration. Sociodemographic resources included poverty status; economic hardship; maternal education, employment, and age; parental marital status; and infant race and sex. Infant regulatory behaviors were measured with the Infant Behavior Questionnaire-Revised Very Short Form effortful control subscale (mean age 11 months; range 8.5-14.3 months). Latent profile analysis was used to profile infants by risk and protective exposures. Regression was used to differentiate profiles by sociodemographic resources and to predict infant regulatory behavior from profiles. Three profiles emerged: low father support, good maternal mental health, and poor maternal mental health. A married mother, less economic hardship, and working mothers predicted infant exposure to good maternal mental health. Infant regulatory behavior was best when the infant was exposed to the good maternal mental health profile. Implications for future research are discussed.

The Premise and Promise of Activation Parenting for Fathers: A Review and Integration of Extant Literature

Although research on fathers tends to focus on mother-derived conceptualizations of caregiving, such as sensitivity, it has been theorized that fathers play a unique role in opening their children to the world by encouraging exploration and risk-taking. However, extant research on these forms of paternal caregiving is scattered across multiple related but distinct domains, namely rough-and-tumble play, challenging parenting behavior, and the activation relationship. Based on the overlap in theory and operationalizations of these domains, the present review aimed to define and operationalize a new caregiving construct: activation parenting (AP). Fathers who exhibit frequent and high-quality AP behaviors encourage children to take risks, challenge children physically and socioemotionally, and set appropriate limits during stimulating interactions to ensure safety and prevent over-arousal. Using Belsky's (1984) process of parenting model as a foundation, associations between paternal AP and characteristics of the father, his environment, and his child are reviewed, with a focus on early childhood (i.e., ages 0-5 years). The present review found some support for paternal AP occurring more frequently, but not necessarily with higher quality, when fathers had children older than one years old. Unexpectedly, the frequency and quality of paternal AP did not differ much by paternal age or indicators of socioeconomic status, or by child age or gender. In line with underlying theories, higher quality paternal AP in early childhood has been found to be associated with children's self-regulation skills and lower levels of internalizing and externalizing problems. Limitations of the current paternal AP literature are discussed and future directions for research, policy, and clinical work are proposed.

Parental characteristics and offspring mental health and related outcomes: a systematic review of genetically informative literature

Various parental characteristics, including psychiatric disorders and parenting behaviours, are associated with offspring mental health and related outcomes in observational studies. The application of genetically informative designs is crucial to disentangle the role of genetic and environmental factors (as well as gene-environment correlation) underlying these observations, as parents provide not only the rearing environment but also transmit 50% of their genes to their offspring. This article first provides an overview of behavioural genetics, matched-pair, and molecular genetics designs that can be applied to investigate parent-offspring associations, whilst modelling or accounting for genetic effects. We then present a systematic literature review of genetically informative studies investigating associations between parental characteristics and offspring mental health and related outcomes, published since 2014. The reviewed studies provide reliable evidence of genetic transmission of depression, criminal behaviour, educational attainment, and substance use. These results highlight that studies that do not use genetically informative designs are likely to misinterpret the mechanisms underlying these parent-offspring associations. After accounting for genetic effects, several parental characteristics, including parental psychiatric traits and parenting behaviours, were associated with offspring internalising problems, externalising problems, educational attainment, substance use, and personality through environmental pathways. Overall, genetically informative designs to study intergenerational transmission prove valuable for the understanding of individual differences in offspring mental health and related outcomes, and mechanisms of transmission within families.

Self-control in early childhood: Individual differences in sensitivity to early parenting

OBJECTIVE

This study extends existing research on the role of infant temperament as a moderator of the association between the quality of parent-child relationships and children's self-control during the pre-school years. In particular, we focus on the potential moderating role of a dimension of early infant temperament known as behavioral inhibition. Assumptions formulated within the diathesis-stress, the vantage-sensitivity, and the differential susceptibility models of individual differences in environmental sensitivity are tested.

METHOD

Data are from the Millennium Cohort Study, a nationally representative birth cohort of 18,552 infants born in the United Kingdom during 2000/01.

RESULTS

The results show that the quality of both mother-child and father-child relationships are associated with children's development of self-control in early childhood. Additionally, individual differences in infant temperament moderate the association between mother-child conflict and children's development of self-control. Specifically, high behavioral inhibition shows a vantage-sensitivity pattern for mother-child conflict.

CONCLUSIONS

Aspects of both mothers' and fathers' relationships with their young children independently predict variations in self-control. This study also provides an initial indication that behavioral inhibition, a temperamental trait best-known for being a risk factor for anxiety, may provide small benefits in relation to young children's self-control development.

Inhibitory Control Across the Preschool Years: Developmental Changes and Associations with Parenting

The normative developmental course of inhibitory control between 2.5 and 6.5 years, and associations with maternal and paternal sensitivity and intrusiveness were tested. The sample consisted of 383 children (52.5% boys). During four annual waves, mothers and fathers reported on their children’s inhibitory control using the Children's Behavior Questionnaire. During the first wave, mothers’ and fathers’ sensitivity and intrusiveness were observed and coded with the Emotional Availability Scales. Inhibitory control exhibited partial scalar invariance over time, and increased in a decelerating rate. For both mothers and fathers, higher levels of sensitivity were associated with a higher initial level of children's inhibitory control, whereas higher levels of intrusiveness predicted a slower increase in children's inhibitory control.

Maternal and paternal effects on offspring internalizing problems: Results from genetic and family-based analyses

It is unclear to what extent parental influences on the development of internalizing problems in offspring are explained by indirect genetic effects, reflected in the environment provided by the parent, in addition to the genes transmitted from parent to child. In this study, these effects were investigated using two innovative methods in a large birth cohort. Using maternal-effects genome complex trait analysis (M-GCTA), the effects of offspring genotype, maternal or paternal genotypes, and their covariance on offspring internalizing problems were estimated in 3,801 mother-father-child genotyped trios. Next, estimated genetic correlations within pedigree data, including 10,688 children, were used to estimate additive genetic effects, maternal and paternal genetic effects, and a shared family effect using linear mixed effects modeling. There were no significant maternal or paternal genetic effects on offspring anxiety or depressive symptoms at age 8, beyond the effects transmitted via the genetic pathway between parents and children. However, indirect maternal genetic effects explained a small, but nonsignificant, proportion of variance in childhood depressive symptoms in both the M-GCTA (~4%) and pedigree (~8%) analyses. Our results suggest that parental effects on offspring internalizing problems are predominantly due to transmitted genetic variants, rather than the indirect effect of parental genes via the environment.

Editorial: Out of Control: More Evidence That Both Family Ecology and Genetic Influences Contribute to the Origins of Poor Self-Control Among Adolescents

Poor self-control, and poor self-regulation more broadly, plays a notable role in myriad outcomes of concern to our field and to society. Poor self-control has been implicated in criminality, academic difficulties, occupational challenges, problematic interpersonal relationships, lower income, and financial problems,¹ and has been identified as a transdiagnostic risk factor for psychiatric difficulties across the life span.² Poor self-control also has been associated with health outcomes such as elevated risk for obesity.³ These and other outcomes, linked in part to poor self-control, are frequently highlighted by media outlets, and, on an annual basis, cost society billions of dollars. Thus, understanding the origins of and factors contributing to self-control is an imperative, multidisciplinary undertaking that will inform efforts to prevent the emergence of poor self-control, as well as intervention efforts targeting those experiencing self-control difficulties.

Selbstregulation als Mediator für den Zusammenhang zwischen Erziehung und der Entwicklung von Verhaltensproblemen und sozial-emotionalen Kompetenzen bei Grundschulkindern

Zusammenfassung. Der Einfluss elterlicher Erziehung auf die Entwicklung von externalisierenden Verhaltensproblemen und sozial-emotionalen Kompetenzen bei Kindern wurde in vielzähligen Studien hervorgehoben. Zu den erklärenden Mechanismen für diese Zusammenhänge liegen bisher nur wenige Erkenntnisse vor. Das Ziel dieser Studie ist es, die Rolle der kindlichen Selbstregulation als möglichen Mediator für den Einfluss von den Erziehungsstilen Liebe, Strenge und Selbstständigkeit auf die Entwicklung von sozial-emotionalen Kompetenzen und externalisierenden Problemverhaltensweisen zu untersuchen. Die vorliegenden Pfadanalysen basieren auf Fragebogendaten über N = 445 Kinder und ihre Familien. Die Ergebnisse dieser Studie zeigen indirekte Effekte für die Zusammenhänge zwischen dem Erziehungsstil und kindlichen Verhaltensproblemen und Kompetenzen auf. Die Fähigkeit zur Selbstregulation kann in dieser Beziehung als eine Art Weiche für die Entwicklung von Kindern verstanden werden.

Dynamic interaction patterns of monolingual and bilingual infants with their parents

Bilingual children show a number of advantages in the domain of communication. The aim of the current study was to investigate whether differences in interactions are present before productive language skills emerge. For a duration of 5 minutes, 64 parents and their 14-month-old infants explored a decorated room together. The coordination of their behaviors in the modalities of action, language, and gesture was coded. The results showed no differences in interactions across different language statuses. In two additional analyses, we first compared monolinguals and bilinguals with caregivers who shared the same language and culture. Results showed the same pattern of non-difference. Second, we compared bilinguals with caregivers from different cultures. The rate and duration of coordination differed across infants with different cultural backgrounds. The findings suggest that exposure to two languages is not sufficient to explain the previously identified beneficial effects in the communicative interactions of bilingual children.

Child Maltreatment, Fathers, and Adolescent Alcohol and Marijuana Use Trajectories

Background: Little is known about heterogeneity in developmental trajectories of alcohol and marijuana use among at-risk youth. Objective: This study aims to examine how child maltreatment and father structural factors at different stages in the life course are associated with different patterns of alcohol and marijuana use trajectories. Methods: A sample of youth (N = 903) were drawn from the Longitudinal Studies of Child Abuse and Neglect (LONGSCAN). Latent class growth analysis was employed to assess heterogeneity in patterns of adolescent alcohol and marijuana use. In addition, binary logistic regression analysis was performed to examine child maltreatment and father structural factors across different developmental stages as predictors of membership in the identified alcohol and marijuana use trajectory classes. Results: For both alcohol and marijuana use, two distinct latent classes were identified: stable no/low alcohol use (74%) vs. increasing alcohol use (26%); stable no/low marijuana use (85%) vs. increasing marijuana use (15%). Emotional abuse during early childhood and physical abuse during adolescence predicted membership in the increasing alcohol use and the increasing marijuana use classes. The presence of father in the home during early childhood was associated with lower likelihood of being in the increasing alcohol use class. Conclusions: Our findings highlight the importance of understanding the etiology of adolescent substance use through a developmental lens. Screening of exposure to child maltreatment across different developmental stages and interventions promoting father engagement during early childhood might help mitigate the risk of adolescent alcohol and marijuana use.

The Early Growth and Development Study: A Dual-Family Adoption Study from Birth Through Adolescence

The Early Growth and Development Study (EGDS) is a prospective adoption study of birth parents, adoptive parents and adopted children (n = 561 adoptees). The original sample has been expanded to include siblings of the EGDS adoptees who were reared by the birth mother and assessed beginning at age 7 years (n = 217 biological children), and additional siblings in both the birth and adoptive family homes, recruited when the adoptees were 8-15 years old (n = 823). The overall study aims are to examine how family, peer and contextual processes affect child and adolescent adjustment, and to examine their interplay (mediation, moderation) with genetic influences. Adoptive and birth parents were originally recruited through adoption agencies located throughout the USA following the birth of a child. Assessments are ongoing and occurred in 9 month's intervals until the adoptees turned 3 years of age, and in 1 to 2 year intervals thereafter through age 15. Data collection includes the following primary constructs: child temperament, behavior problems, mental health, peer relations, executive functioning, school performance and health; birth and adoptive parent personality characteristics, mental health, health, context, substance use, parenting and marital relations; and the prenatal environment. Findings highlight the power of the adoption design to detect environmental influences on child development and provide evidence of complex interactions and correlations between genetic, prenatal environmental and postnatal environmental influences on a range of child outcomes. The study sample, procedures and an overview of findings are summarized and ongoing assessment activities are described.