Socially withdrawn children frequently refrain from social activities in the presence of peers. The lack of social interaction in childhood may result from a variety of causes, including social fear and anxiety or a preference for solitude. From early childhood through to adolescence, socially withdrawn children are concurrently and predictively at risk for a wide range of negative adjustment outcomes, including socio-emotional difficulties (e.g., anxiety, low self-esteem, depressive symptoms, and internalizing problems), peer difficulties (e.g., rejection, victimization, poor friendship quality), and school difficulties (e.g., poor-quality teacher-child relationships, academic difficulties, school avoidance). The goals of the current review are to (a) provide some definitional, theoretical, and methodological clarity to the complex array of terms and constructs previously employed in the study of social withdrawal; (b) examine the predictors, correlates, and consequences of child and early-adolescent social withdrawal; and (c) present a developmental framework describing pathways to and from social withdrawal in childhood.

The features, processes, and effects of children's experiences with their peers exist on multiple levels of social complexity and intersect with many other developmental domains. Peers are implicated in several theoretical accounts of multiple development domains, including the models proposed by Piaget, Sullivan, the social learning theorists, Vygotsky, ethologists, and the symbolic interactionists. The extensive data base on peer relations points to the diverse set of positive and negative experiences that children and adolescents can have with their peers and to the breadth of the processes that account for peer effects on multiple forms of outcome including behavior (e.g., aggression), affect (e.g., depression, anxiety), school performance, self‐perceptions, moral perspectives, and physical and mental health. The chapter reviews the effects of several experiences including acceptance and rejection, exclusion, friendship, victimization, popularity, and experiences within groups. Specific attention is devoted to variation in processes and effects as a function of culture and gender.

Obesity during childhood and adolescence is a growing problem in the United States, Canada, and around the world that leads to significant physical, psychological, and social consequences. Peer experiences have been theoretically and empirically related to the “Big Two” contributors to the obesity epidemic, unhealthy eating and physical inactivity [1]. In this article, we synthesize the empirical literature on the influence of peers and friends on youth’s eating and physical activity. Limitations and issues in the theoretical and empirical literatures are also discussed, along with future research directions. In conclusion, we argue that the involvement of children’s and adolescents’ peer networks in prevention and intervention efforts may be critical for promoting and maintaining positive behavioral health trajectories. However, further theoretical and empirical work is needed to better understand the specific mechanisms underlying the effects of peers on youth’s eating and physical activity.

The overarching goal of this study was to examine the associations between three social withdrawal subtypes (shyness, unsociability, avoidance), peer isolation, peer difficulties (victimization, rejection, exclusion, low acceptance), and loneliness in India during early adolescence. Participants were 194 adolescents in Surat, India (M age = 13.35 years). Peer nominations of peer relations and socioemotional behaviors were gathered, along with self-reports of reasons for being alone and loneliness. Preliminary evidence of validity for the self-report measure of withdrawal subtypes and isolation was found, and factor analyses indicated that shyness, unsociability, and avoidance represent related, but distinct forms of withdrawal that are distinct from isolation. Shyness and avoidance were uniquely associated with loneliness and exclusion, but unsociability was not. The association between avoidance and loneliness was mediated by exclusion. Findings suggest that social withdrawal may be best conceptualized as a multifaceted construct during childhood and adolescence, in Western and non-Western societies.

Heterogeneity and individual differences in the developmental course of social withdrawal were examined longitudinally in a community sample (N=392). General Growth Mixture Modeling (GGMM) was used to identify distinct pathways of social withdrawal, differentiate valid subgroup trajectories, and examine factors that predicted change in trajectories within subgroups. Assessments of individual (social withdrawal), interactive (prosocial behavior), relationship (friendship involvement, stability and quality, best friend's withdrawal and exclusion/ victimization) and group-(exclusion/victimization) level characteristics were used to define growth trajectories from the final year of elementary school, across the transition to middle school, and then to the final year of middle school (fifth-to-eighth grades). Three distinct trajectory classes were identified: low stable, increasing, and decreasing. Peer exclusion, prosocial behavior, and mutual friendship involvement differentiated class membership. Friendlessness, friendship instability, and exclusion were significant predictors of social withdrawal for the increasing class, whereas lower levels of peer exclusion predicted a decrease in social withdrawal for the decreasing class. KeywordsSocial withdrawal; Developmental trajectories; Friendship; Exclusion The study of developmental psychopathology has characterized maladjustment as comprising two broad forms of difficulties-undercontrol (e.g., aggression) and overcontrol