Codevelopment of Delinquency, Alcohol Use, and Aggression Toward Peers and Dates: Multitrajectory Patterns and...

Area of Science:

• Developmental Psychology
• Adolescent Behavior
• Risk Factor Analysis

Background:

• Adolescence is a critical period for the development of problem behaviors.
• Understanding distinct developmental trajectories of substance use, delinquency, and aggression is crucial for targeted interventions.
• Previous research has often examined these behaviors in isolation, necessitating a multidomain approach.

Purpose of the Study:

• To characterize developmental patterns of alcohol use, delinquency, and interpersonal aggression in a normative adolescent sample.
• To identify distinct trajectory groups using multitrajectory group-based modeling.
• To examine gender differences in group membership and identify predictors of these trajectories.

Main Methods:

• Utilized seven waves of data from a cohort sequential study (grades 6-12, n=2,825; 50% girls).
• Applied multitrajectory group-based modeling to identify distinct developmental patterns.
• Analyzed individual (self-control, negative emotionality), family (violence, monitoring), and peer (substance use norms) factors.

Main Results:

• Identified four distinct trajectory groups: low risk (33%), declining peer aggressors (44%), peer and dating aggressors (13%), and multidomain high risk (10%).
• Girls were more likely than boys to be in the peer and dating aggressor group and less likely in the multidomain high-risk group.
• Individual, family, and peer factors significantly distinguished class membership.

Conclusions:

• Adolescent involvement in alcohol use, delinquency, and aggression follows distinct developmental pathways.
• Gender plays a role in the likelihood of belonging to specific risk trajectories.
• Individual, family, and peer influences are critical in shaping these developmental patterns.