Suchergebnisse

This study used behavioral genetic methods to examine differences in genetic and environmental influences on adolescent aggression across adequate and disadvantaged neighborhoods. Analyses used National Longitudinal Study of Adolescent Health data from 2,342 monozygotic twin, dizygotic twin, full‐sibling, and half‐sibling pairs classified into structurally adequate and disadvantaged neighborhoods according to Census data on the proportion of single‐parent households with children, proportion of families in poverty, and unemployment levels in sibling pairs' block groups. Separately estimating genetic and environmental influences across adequate and disadvantaged neighborhoods revealed that although genetic influences are significant in both adequate and disadvantaged neighborhoods, shared environmental influences (e.g., family influences shared by siblings) were significant only among adolescents from disadvantaged neighborhoods. These results provide insight into differences in individual‐level influences that contribute to adolescent aggression within these different types of neighborhoods. Significant shared environmental influences in disadvantaged neighborhoods suggest the importance of family processes is increased by neighborhood disadvantage.

Background: Sustained recovery from substance abuse is a dynamic intraindividual-level process. Objectives: We argue that research on recovery process will benefit from a theoretical approach that captures both the dynamic and the idiographic nature of substance abuse recovery. In addition to setting out why we believe that research on recovery can benefit from such an approach, we provide a demonstration of idiographic within-individual analyses of between- and within-day associations among negative affect, substance use craving, and positive social experiences. Design and Subjects: The data used were drawn from 39 abstinent young adults in 12-step recovery from substance abuse (mean age = 22.9, females = 12). Participants provided an average of 26.7 days of daily diary data by end-of-day collections. Unified first-order structural equation models were fit individually to predict daily levels of craving and negative affect from the previous day's same two variables as well as from both the previous day's and the same day's positive social experiences. Results: Model estimates demonstrated substantial interindividual heterogeneity in their day-to-day associations in both direction and magnitude, highlighting the importance of applying idiographic approach to understanding recovery. Cluster analyses were subsequently applied to individual model estimates to identify homogeneous subgroups that demonstrated similar day-to-day association patterns, revealing two distinct subgroups that appeared to manage daily abstinence through different mechanisms. Conclusions: The idiographic approach presented provides the potential value of framing recovery as an idiosyncratic dynamic process and provides targets for tailored and adaptive treatment and recovery supporting intervention in future design and evaluation.

AbstractThe Pennsylvania Longitudinal Study of Parents and Children Twin Registry was developed to capture a representative sample of multiple births and their parents in the state of Pennsylvania. The registry has two main efforts. The first began in 2012 through recruitment of adolescents in Pennsylvania schools. The second effort began in January 2019 in partnership with the Pennsylvania Department of Health to capture the birth cohort of twins born from 2007 to 2017. Study recruitment, sample demographics, focus and measures are provided, as well as future directions.

The most extensively studied influence on adolescent conduct problem behaviors is peers, and the literature points to genetics as one source of individual differences in peer influence. The purpose of this study was to test the hypothesis that an environmental sensitivity genetic index comprised of DRD4, 5‐HTTLPR, and GABRA2 variation would moderate the association between peer and adolescent conduct problems. Latent growth modeling was applied to PROSPER project longitudinal data from adolescents and their peers. Results showed the hypothesis was supported; adolescents with more copies of putative sensitivity alleles were more strongly influenced by their peers. The interaction form was consistent with differential susceptibility in follow‐up analyses. Strengths and weaknesses of genetic aggregates for sensitivity research are discussed.