This 17-year prospective study applied a social-developmental lens to the challenge of distinguishing predictors of adolescent-era substance use from predictors of longer term adult substance use problems. A diverse community sample of 168 individuals was repeatedly assessed from age 13 to age 30 using test, self-, parent-, and peer-report methods. As hypothesized, substance use within adolescence was linked to a range of likely transient social and developmental factors that are particularly salient during the adolescent era, including popularity with peers, peer substance use, parent–adolescent conflict, and broader patterns of deviant behavior. Substance abuse problems at ages 27–30 were best predicted, even after accounting for levels of substance use in adolescence, by adolescent-era markers of underlying deficits, including lack of social skills and poor self-concept. The factors that best predicted levels of adolescent-era substance use were not generally predictive of adult substance abuse problems in multivariate models (either with or without accounting for baseline levels of use). Results are interpreted as suggesting that recognizing the developmental nature of adolescent-era substance use may be crucial to distinguishing factors that predict socially driven and/or relatively transient use during adolescence from factors that predict long-term problems with substance abuse that extend well into adulthood.

This study evaluated a school-based intervention to enhance adolescent peer relationships and improve functional outcomes, building upon Ed Zigler’s seminal contribution in recognizing the potential of academic contexts to enhance social and emotional development. Adolescents (N = 610) primarily from economically or racially/ethnically marginalized groups were assessed preintervention, postintervention, and at 4-month follow-up in a randomized controlled trial. At program completion, intervention participants reported significantly increased quality of peer relationships; by 4-month follow-up, this increased quality was also observable by peers outside of the program, and program participants also displayed higher levels of academic engagement and lower levels of depressive symptoms. These latter effects appear to have potentially been mediated via participants’ increased use of social support. The potential of the Connection Project intervention specifically, and of broader efforts to activate adolescent peer relationships as potent sources of social support and growth more generally within the secondary school context, is discussed.

This study examined early adolescent romantic “churning,” defined here as having a large number of boyfriends/girlfriends by age 13, as a problematic marker likely to predict hostility, abuse, and avoidance during conflict in later relationships. A sample of 184 adolescents was followed through age 24 to assess predictions of hostility, abuse, and avoidance during conflict from early romantic churning. Controlling for gender and family income, romantic churning at age 13 predicted relative decreases in peer preference and relative increases in conflict and betrayal in close friendships from ages 13 to 16, as well as higher observable hostility and self- and partner-reported abuse in romantic relationships by age 18 and greater avoidance during conflict with romantic partners by age 24. Findings remained after accounting for attachment security, social competence, and friendship quality in early adolescence, suggesting that early romantic churning may uniquely predict a problematic developmental pathway.

Adolescent association with deviant and delinquent friends was examined for its roots in coercive parent–teen interactions and its links to functional difficulties extending beyond delinquent behavior and into adulthood. A community sample of 184 adolescents was followed from age 13 to age 27, with collateral data obtained from close friends, classmates, and parents. Even after accounting for adolescent levels of delinquent and deviant behavior, association with deviant friends was predicted by coercive parent–teen interactions and then linked to declining functioning with peers during adolescence and greater internalizing and externalizing symptoms and poorer overall adjustment in adulthood. Results are interpreted as suggesting that association with deviant friends may disrupt a core developmental task—establishing positive relationships with peers—with implications that extend well beyond deviancy-training effects.

This study examined the effect of close friendship intensity as a potential amplifier of an adolescent's preexisting tendencies toward depressive and aggressive symptoms. A diverse community sample of 170 adolescents and their closest friends was assessed via multiple methods, and adolescents were followed from age 16 to 17. Results supported the hypothesized effect, with more intense close friendships interacting with higher baseline levels of behavioral symptoms to predict greater relative increases in symptoms over time. Effects were observed for both depressive and aggressive symptoms, and appeared with respect to multiple observational measures of friendship intensity. Findings are interpreted as suggesting that seemingly disparate phenomena (e.g., co‐rumination for depression and deviancy‐training for aggression) may both be dependent upon the intensity of the adolescent's social connections.

We examined the effects of a teacher coaching program on discipline referrals using records from 7,794 U.S. classrooms in secondary schools. Some classroom teachers took part in a trial: They were randomized to receive intensive coaching in a focal classroom or to form a business-as-usual control group. The remaining teachers taught in the same schools as the teachers in the trial. Previous research suggested that the coaching program was associated with increasing equity in discipline referrals in focal, coached classrooms. The current study addressed whether effects found in the teachers’ focal, coached classrooms generalized to diverse classrooms in their course load. Results suggested that the coaching program had no generalized effects on reducing referrals with African American students or racial referral gaps in classrooms with coached teachers, relative to the control teachers and the other teachers in the schools. We offer implications for coaching programs and directions for equity-oriented efforts to reduce racial discipline gaps.

This study assessed early adolescent positive and negative affect as long-term predictors of romantic con-flict, anxious and avoidant attachment, romantic and social competence, and relationship satisfaction inadulthood utilizing a longitudinal, multi-informant study of 166 participants assessed annually at ages14–17, and again at ages 23–25. Positive affect in adolescence predicted greater self-rated social compe-tence during late adolescence and greater self-rated romantic competence and less partner-reported hos-tile conflict almost a decade later. Negative affect predicted lower social and romantic competence.Results generally remained significant after controlling for personality traits, providing greater supportfor the hypothesis that affect has a robust, direct relation to romantic development over time.

This study examined early adolescent autonomy and re-

latedness during disagreements with friends as key social

competencies likely to predict academic achievement dur-

ing the transition to high school and academic attainment

into early adulthood. A sample of 184 adolescents was fol-

lowed through age 29 to assess predictions to academic

success from observed autonomy and relatedness during a

disagreement task with a close friend. Observed autonomy

and relatedness at age 13 predicted relative increases in

grade point average (GPA) from 13 to 15, and greater aca-

demic attainment by age 29, after accounting for baseline

GPA. Findings remained after accounting for peer accept-

ance, social competence, scholastic competence, external-

izing and depressive symptoms, suggesting a key role for

autonomy, and relatedness during disagreements in help-

ing adolescents navigate challenges in the transition to high

school and beyond.