Although research on the reasons for engaging in nonsuicidal self-injury (NSSI) has increased dramatically in the last few years, there are still many aspects of this pernicious behavior that are not well understood. The purpose of this study was to address these gaps in the literature, with a particular focus on investigating whether NSSI (a) regulates affective valence in addition to affective arousal and (b) serves a cognitive regulation function in addition to an affect regulation function. To elucidate these issues, the present study utilized a sample of 112 participants (33 controls, 39 no pain controls, 16 NSSI individuals, and 24 controls matching the affect dysregulation levels of the NSSI group), employed psychophysiological measures of affective valence (startle-alone reactivity) and quality of information processing (prepulse inhibition), and used experimental methods involving an NSSI-proxy to model the NSSI process. Results largely were consistent with predictions, supporting the hypotheses that NSSI serves to regulate cognitive processing and affective valence. On this latter point, however, the control groups also showed a decrease in negative affective valence after the NSSI-proxy. This unexpected finding is consistent with the hypothesis that opponent processes may contribute to the development of self-injurious behaviors (Joiner, 2005). Overall, the present study represents an important extension of previous laboratory NSSI studies and provides a fertile foundation for future studies aimed at understanding why people engage in NSSI.

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Peer victimization has been implicated as a traumatic stressor that compromises children's longterm mental health, yet a dearth of prospective research specifically demonstrates lasting effects of early victimization. This research examined whether early (2 nd grade) victimization and increasing (2 nd -5 th grade) victimization independently predicted depressive symptoms and aggressive behavior (overt and relational) in 5 th grade. Participants included 433 children (238 girls, 195 boys). Children reported on peer victimization and depressive symptoms; teachers reported on peer victimization and aggressive behavior. Latent growth curve analysis revealed that both early and increasing victimization made unique contributions to subsequent depressive symptoms and aggressive behavior. Relational aggression was particularly likely to follow victimization in girls.Over the past two decades, developmental scientists have increasingly implicated peer victimization as a major public health concern (Graham, 2006;Hawker & Boulton, 2000), sparking the emergence of a large number of prevention programs aimed at containing bullying and its negative effects. In large part, this concern stems from the idea that peer victimization exerts a lasting influence on mental health. Although some short-term prospective research links peer victimization with subsequent mental health problems, few studies systematically examine the relative contributions of early versus increasing victimization to mental health across a significant developmental period. Consequently, it is difficult to determine whether early exposure to peer victimization has long-term consequences beyond children's recent social experiences. The present study used a dualinformant longitudinal design to examine whether both early victimization and changes in victimization across the elementary school years predicted subsequent mental health difficulties, specifically depressive symptoms and aggressive behavior. Mental Health Consequences of Peer VictimizationChildren exposed to victimization at the hands of their peers may react in diverse ways. They may feel a sense of helplessness and attribute this maltreatment to their own deficiencies, potentially compromising their self-worth and precipitating depressive NIH Public Access (Graham & Juvonen, 1998;Troop-Gordon & Ladd, 2005). Alternatively, they may feel a sense of injustice and attribute this maltreatment to the hostility of their peers, potentially inciting anger and efforts to retaliate or to re-establish their status in the peer group through aggressive behavior (Mahady Wilton & Craig, 2000;Salmivalli, Karhunen, & Lagerspetz, 1996;Troop-Gordon & Ladd, 2005). Consistent with these ideas, prospective longitudinal research reveals that victimization contributes to subsequent depressive symptoms (Nylund, Bellmore, Nishina, & Graham, 2007;Prinstein, Boergers, & Vernberg, 2001;Sweeting, Young, West, & Der, 2006), as well as aggression (Hanish & Guerra, 2002;Lamarche et al., 2007;Ladd & Troop-Gordon, 2003;Rusby...

We tested a developmental cascade model of autonomy and relatedness in the progression from parent to friend to romantic relationships across ages 13, 18, and 21. Participants included 184 adolescents (53% female, 58% Caucasian, 29% African American) recruited from a public middle school in Virginia. Parental psychological control at age 13 undermined the development of autonomy and relatedness, predicting relative decreases in autonomy and relatedness with friends between ages 13 and 18 and lower levels of autonomy and relatedness with partners at age 18. These cascade effects extended into adult friendships and romantic relationships, with autonomy and relatedness with romantic partners at age 18 being a strong predictor of autonomy and relatedness with both friends and partners at age 21.

The potential importance of depending on others during adolescence in order to establish independence in young adulthood was examined across adolescence to emerging adulthood. Participants included 184 teens (46% male; 42% non-White), their mothers, best friends, and romantic partners, assessed at ages 13–14, 18, 21–22, and 25. Path analyses showed that associations were both partner and age specific: markers of independence were predicted by participants’ efforts to seek support from mothers at age 13, best friends at 18, and romantic partners at 21. Importantly, analyses controlled for support seeking from these partners at other ages, as well as for other potentially confounding variables including attachment security, scholastic/job competence, and physical attractiveness over time. Moreover, analyses suggested the transfer of support seeking behavior from mothers to best friends to romantic partners over time based on support given by the previous partner at an earlier age.

Maternal and paternal psychological control, peer attitudes, and the interaction of psychological control and peer attitudes at age 13 were examined as predictors of risky sexual behavior before age 16 in a community sample of 181 youth followed from age 13 to 16. Maternal psychological control moderated the link between peer attitudes and sexual behavior. Peer acceptance of early sex predicted greater risky sexual behaviors, but only for teens whose mothers engaged in high levels of psychological control. Paternal psychological control demonstrated the same moderating effect for girls; for boys, however, high levels of paternal control predicted risky sex regardless of peer attitudes. Results are consistent with the theory that peer influences do not replace parental influences with regard to adolescent sexual behavior; rather, parental practices continue to serve an important role either directly forecasting sexual behavior or moderating the link between peer attitudes and sexual behavior.

Adolescents’ negative social expectations of their peers were examined as long-term predictors of problematic self-reported social functioning. Early adolescent negative expectations were hypothesized to predict risk-averse functioning in late adolescence that would ultimately contribute to confirmation of those expectations. Utilizing observational data and friend- and self-reports from a community sample of 184 adolescents followed from ages 13 to 25, adolescents with more negative expectations were found to have become increasingly submissive with friends over time and were rated as less romantically appealing by late adolescence (after controlling for baseline levels of these variables, baseline friend-rated social competence and self-reported depressive symptoms). In turn, submissiveness and romantic appeal predicted problematic self-reported social functioning well into adulthood and mediated the relationship between adolescent negative expectations and problematic self-reported adult social functioning. These findings support the possibility of a self-fulfilling social process unfolding from early adolescence to adulthood.

Attachment state of mind was investigated as a long-term predictor of romantic relationship competence. A secure early adolescent attachment state of mind was hypothesized to predict more constructive dyadic behaviors during conflict discussions and support seeking interactions in late adolescence and early adulthood. Utilizing multi-method data from a community sample of 184 individuals, followed from ages 14 to 21, adolescents with a secure attachment state of mind at age 14 were found to be in relationships that displayed more constructive dyadic conflict discussion behaviors and dyadic supportive behaviors at both ages 18 and 21. Results suggest substantial links between early adolescent attachment state of mind and the adult romantic relationship atmosphere an individual creates and experiences.