Two Models of the Development of Social Withdrawal and Social Anxiety in Childhood and Adolescence: Progress and Blind Spots.

This commentary features a review of two recently reformulated models of the development of child and adolescent: (1) social withdrawal by Rubin and Chronis-Tuscano 2021, and (2) social anxiety by Spence and Rapee 2016. The articles that present these reformulated models now cover advances made during the prior 12 to 18 years of research, including increased knowledge of genetic vulnerability to anxiety and longitudinal patterns of development, and acknowledgement of multiple pathways towards and away from the development of social withdrawal or social anxiety (i.e., equifinality, multifinality). However, these reformulated models also contain several blind spots. The model of social withdrawal development would be improved by explicitly referring to peer treatment (not only attitudinal peer rejection), especially peer exclusion; and incorporating the potential development of clinically significant anxiety in childhood (not only adolescence) and delays in developmental milestones in adulthood. The model of social anxiety development would be improved by featuring social withdrawal as a proximal affective-behavioral profile (rather than a temperament) and drawing upon the literature on social withdrawal and its links to peer relations. Overall, there is a continuing lack of integration between developmental and clinical research and models of the development of social withdrawal and social anxiety.

Development of Infant High-Intensity Fear and Fear Regulation from 6 to 24 Months: Maternal Sensitivity and Depressive Symptoms as Moderators.

This study tested bidirectional relations between infant high-intensity fear and fear regulation over 1.5 years, and maternal sensitivity and depressive symptoms as moderators. Participants were 1,292 mother-infant pairs prospectively assessed at three times when infants were 6, 15, and 24 months old. Infant high-intensity fear and fear regulation (avoidance, orienting to mother, attention regulation, and self-soothing) were observed during the Mask Task at each of these time points. Likewise, mothers reported their depressive symptoms, and their sensitivity was observed in a separate mother-child interaction task at each time point. Conditional multilevel growth models revealed that highly avoidant infants exhibited less initial high-intensity fear, but faster growth in high-intensity fear over time. Furthermore, highly avoidant infants exhibited more concurrent high-intensity fear when their mothers demonstrated low sensitivity. Unexpectedly, when their mothers were highly depressed, infants who used more attention regulation demonstrated more rapid growth of high-intensity fear over time. Finally, when their mothers were not depressed, infants exhibiting more high-intensity fear oriented more to their mothers concurrently. When their mothers reported high depressive symptoms over time, infants with more high-intensity fear initially oriented less to their mothers but more rapidly increased orienting to their mothers over time. Findings reveal the interplay between infant and maternal factors over time in development of infant high-intensity fear. In particular, maternal sensitivity protected highly fearful infants by rapidly reducing fear reactivity despite infant avoidance. In contrast, high maternal depressive symptoms introduced both immediate and enduring risks for infant fear development. Clinical implications are discussed.

Anxious Solitude, Reciprocated Friendships with Peers, and Maternal Overcontrol from Third through Seventh Grade: A Transactional Model.

Guided by a Transactional Model of anxious solitude development, we tested friend and maternal influences on continuity and change in youth anxious solitude from 3rd through 7th grade, as well as the influence of youth anxious solitude on decreased friendship participation and increased maternal overcontrol over time. Participants were 230 American youth (57% girls) selected for longitudinal study from a public-school screening sample (n = 688). Peers reported on anxious solitude, both peers and youth reported on reciprocated friendship, and youth reported on their mother's overcontrol annually. Stability and incremental change in youth, friend, and maternal factors were tested in an autoregressive cross-lagged panel analytic model. Having few mutual friendships predicted incremental increase in youth anxious solitude in mid-elementary school, then youth anxious solitude predicted the loss of friendships after the middle school transition. Additionally, youth anxious solitude in third grade evoked increased maternal overcontrol in fourth grade, but the reverse direction of effect was not supported. Youth's participation in few friendships also evoked mothers' overcontrol, which exacerbated their child's loss of friendships in elementary school. Taken together, having few mutual friends contributed to youth anxious solitude and maternal overcontrol, and subsequently these factors further exacerbated youth's loss of friendships.

Relations Among Anxious Solitude, Peer Exclusion, and Maternal Overcontrol from 3rd Through 7th Grade: Peer Effects on Youth, Youth Evocative Effects on Mothering, and the Indirect Effect of Peers on Mothering via Youth.

This study evaluated a transactional model of youth anxious solitude and peer and maternal relations from 3rd through 7th grade. Participants were 230 American youth (57% girls) selected for longitudinal study from a screening sample recruited from public schools (N = 688). Peers reported on anxious solitude and peer exclusion and youth reported on their mother's overcontrol annually. In an autoregressive cross-lagged panel analytic model peer exclusion predicted incremental increases in anxious solitude during elementary school and after the middle school transition. Additionally, anxious solitude evoked incremental increases in maternal overcontrol during elementary school. Finally, anxious solitude in 4th grade mediated the positive indirect relation between peer exclusion in 3rd grade and maternal overcontrol in 5th grade. These results suggests that peer relations can indirectly effect mothering via increased youth anxious solitude over time. Taken together, evidence supports a Transactional Model of anxious solitude development. Additionally, consistent with previous evidence, elevated youth anxious solitude at the end of elementary school in 5th grade predicted decreased peer exclusion after the middle school transition in 6th grade when youth experience a fresh start with peer relations. Nonetheless, youth (especially girls) demonstrated greater year-to-year stability in anxious solitude across the first two years of middle school than in the last three years of elementary school.

Social Withdrawal and Anxiety in Childhood and Adolescence: Interaction between Individual Tendencies and Interpersonal Learning Mechanisms in Development : Introduction to the Special Issue.

In this introduction to the special issue on Social Withdrawal and Anxiety in Childhood and Adolescence: Interaction Between Individual Tendencies and Interpersonal Learning Mechanisms in Development, we analyze conceptual models guiding the twelve studies featured herein. Findings from multiple investigations support Diathesis - Stress Models which emphasize the role of parent- or peer-related interpersonal stress in strengthening affective-behavioral or biological vulnerabilities (diatheses) to anxious solitude or social anxiety. Other investigations support only child vulnerability effects, consistent with a Diathesis-only Model, but such effects are often framed as potentially part of broader Diathesis-Stress or Child by Environment Transactional Models. Next we discuss novelty in development as defined as directional change in the progression of affective-behavioral patterns over time. Novelty in development is postulated in: 1) a Chronic Stress Model that proposes that interpersonal stress can generate or maintain social withdrawal and anxiety; 2) Stress Generation and Transactional Models that propose that child vulnerability can evoke interpersonal stress; and 3) an Ecological Transition Model that proposes that ecological transitions can serve as turning points prompting reorganization in the child-environment system which can result in the deflection of previous patterns of adjustment onto alternate trajectories. We also highlight additional themes from the set of studies found herein. These themes include the significance of gender and culture vis-à-vis the development of social withdrawal and anxiety. Other themes include motivations for social withdrawal; the influence of peer predictability on social withdrawal and brain function; and how the study of multiple developmental pathways has been supported by contemporary analytic techniques.

Multiple Trajectories in Anxious Solitary Youths: the Middle School Transition as a Turning Point in Development.

This study aimed to identify divergent patterns of individual continuity and change in anxious solitude (AS) in the last half of elementary school (3rd - 5th grade) and the first two years of middle school (6th - 7th grade), and test predictors and outcomes of these pathways. Participants were 688 youths (girls n = 354, 51.5%; M age at outset = 8.66 years, SD = 0.50). Latent class growth analyses identified two AS trajectory classes in elementary school (moderate-decreasing, high-increasing) and three in middle school (low-stable, low-increasing, high-decreasing). The elementary school moderate-decreasing class was two-and-a-half times more likely than others to end in the middle school low-stable class. In contrast, the elementary school high-increasing class was twice as likely as others to end in the middle school low-increasing class, and four times as likely to end in the middle school high-decreasing class. Peer exclusion predicted membership in increasing AS trajectory classes in both elementary and middle school, whereas the middle school high-decreasing AS trajectory class demonstrated decreasing peer exclusion during middle school. Likewise, inability to defend oneself predicted membership in increasing AS trajectory classes in both elementary and middle school, whereas membership in the middle school high-decreasing AS trajectory class was predicted by inability to defend oneself in elementary but not middle school. High-decreasing AS youths' improved ability to defend themselves in middle school appeared to be related to a cascade of improvements in related domains. In contrast, membership in increasing AS classes in elementary and middle school predicted symptoms of social anxiety and depression.

Anxious Solitude and Self-Compassion and Self-Criticism Trajectories in Early Adolescence: Attachment Security as a Moderator.

Youths' attachment representations with their parents were tested as moderators of the relation between peer-reported anxious solitude and self-compassion and self-criticism trajectories from fifth to seventh grades. Participants were 213 youth, 57% girls, M = 10.65 years of age. Growth curves revealed that attachment representations with both parents moderated the relation between AS and self-processes such that AS youth with (a) dual secure attachments demonstrated the most adaptive self-processes, (b) one secure attachment demonstrated intermediately adaptive self-processes, and (c) dual insecure attachments demonstrated the least adaptive self-processes over time. AS youth with dual insecure attachments are of most concern because they demonstrated elevated and increasing self-criticism over time, given evidence for relations between self-criticism and internalizing psychopathology.

Anxious solitude and the middle school transition: a diathesis × stress model of peer exclusion and victimization trajectories.

Consistent with a Diathesis × Stress model, it was hypothesized that anxious solitude (individual vulnerability) and the middle school transition (environmental stress) would jointly predict peer exclusion and victimization trajectories. Youth (N = 688) were followed from 3rd through 7th grade, with the middle school transition in 6th grade. Peer-reported peer exclusion and physical victimization trajectories across the middle school transition were modeled with piecewise growth curves. As expected, anxious solitude predicted elevated exclusion and victimization in both elementary and middle school. Nonetheless, exclusion and victimization declined after the transition on average, and anxious solitary youth versus average youth experienced greater relative declines. The pattern of results suggests that the collective renegotiation of peer relations after the transition, rather than posttransition decline in classroom emotional support, contributed to the posttransition decline in peer mistreatment.

Classroom emotional climate as a moderator of anxious solitary children's longitudinal risk for peer exclusion: a child × environment model.

This study tests the ability of classroom emotional climate to moderate anxious solitary children's risk for peer exclusion over a 3-year period from 3rd through 5th grade. Six hundred eighty-eight children completed peer nominations for anxious solitude and peer exclusion in the fall and spring semesters of each grade, and observations of classroom emotional climate were conducted at the same time points. Results revealed a positive relation between anxious solitude and peer exclusion in the fall semester of each grade. However, in classrooms with supportive versus unsupportive emotional climates, this relation demonstrated a different pattern of change from fall to spring semesters. In classrooms with supportive emotional climates, children with high versus low levels of anxious solitude experienced relative elevation in fall peer exclusion, but this disappeared by the spring, such that spring peer exclusion levels were equalized among children who differed in anxious solitude. This result is consistent with hypotheses guided by the Child × Environment model. However, in classrooms with unsupportive emotional climates, results did not conform to expectations that children with high anxious solitude would experience stable or increased peer exclusion over time.

Social anxiety in childhood: bridging developmental and clinical perspectives.

In this introductory chapter, guided by developmental psychopathology and developmental science as overarching integrative theoretical frameworks, the authors define three constructs related to social anxiety in childhood (behavioral inhibition, anxious solitude/withdrawal, and social anxiety disorder) and analyze commonalities and differences in the content and assessment of these constructs. They then highlight controversies between developmental and clinical approaches to the definition of these constructs, the role of biology in social anxiety, age of onset of social anxiety, information processing biases in social anxiety, heterogeneity in the social and emotional adjustment of socially anxious children, and targets of intervention for childhood social anxiety.

Anxious solitude/withdrawal and anxiety disorders: conceptualization, co-occurrence, and peer processes leading toward and away from disorder in childhood.

This chapter contains (1) an analysis of commonalities and differences in anxious solitude and social anxiety disorder, and a review of empirical investigations examining (2) correspondence among childhood anxious solitude and anxiety and mood diagnoses and (3) the relation between peer difficulties and temporal stability of anxious solitude and depressive symptoms. Findings support a diathesis-stress model in which anxious solitude forecasts symptoms of psychopathology primarily in the context of interpersonal stress. Additionally, evidence for individual and environmental factors which moderate risk for peer difficulties among anxious solitary children is reviewed. Implications for intervention are discussed.

Anxious solitude and clinical disorder in middle childhood: bridging developmental and clinical approaches to childhood social anxiety.

It was hypothesized that children identified by their peers at school as anxious solitary would report more symptoms of social anxiety disorder on a self report questionnaire and, on the basis of child and parent clinical interviews, receive more diagnoses of social anxiety disorder and additional anxiety and mood disorders. Participants were 192 children drawn from a community sample of 688 children attending public elementary schools. Half of these children were selected because they were identified as anxious solitary by peers and the other half were demographically-matched controls. 192 children provided self reports of social anxiety disorder symptoms on a questionnaire, and 76 of these children and their parent participated in clinical interviews. Results indicate that children identified by their peers as anxious solitary in the fall of 4th grade, compared to control children, were significantly more likely to receive diagnoses of social anxiety disorder, specific phobia, and selective mutism based on parent clinical interviews. Additionally, there was a tendency for these children to be diagnosed with generalized anxiety disorder and post traumatic stress disorder based on parent clinical interviews. Furthermore, children who had been identified as anxious solitary at any time in the 3rd or 4th grades were more likely than control children to report symptoms of social anxiety disorder that fell in the clinical range and to receive diagnoses of social anxiety disorder and dysthymia (both trends) and major depression (a significant effect) according to parental clinical interview.

Anxious solitude and peer exclusion predict social helplessness, upset affect, and vagal regulation in response to behavioral rejection by a friend.

It was hypothesized that combined individual child vulnerability (anxious solitude) and interpersonal stress (peer exclusion) would predict the strongest responses to experimentally manipulated behavioral peer rejection. Results indicated that in a sample of 3rd graders (N = 160, 59% girls), anxious solitary excluded children displayed more behavioral manifestations of social helplessness before and after behavioral rejection, reported more feelings of rejection in anticipation of and reaction to behavioral rejection, and were observably more upset during behavioral rejection than were normative children. Moreover, affective responses to behavioral rejection mediated the relation between anxious solitary excluded status and behavioral manifestations of social helplessness. Furthermore, anxious solitary excluded children versus anxious solitary children demonstrated excessive suppression of vagal tone and more sustained acceleration in heart rate during the experiment. Results also indicated that affective, social-cognitive, and regulatory processes directly contributed to children's responses to behavioral rejection.

Anxious Solitude, Unsociability, and Peer Exclusion in Middle Childhood: A Multitrait-Multimethod Matrix.

This study examines convergent and divergent validity for middle childhood anxious solitude, unsociability, and peer exclusion as assessed by five informants (peers, teachers, observers, the self, and parents). Participants were 163 (67 male, 96 female) third grade children (M age = 8.70 years). Parent reports were available for a subset of the sample (N = 95). Validity was analyzed via multitrait-multimethod correlation matrices and structural equation models. Results indicate that anxious solitude and peer exclusion have better convergent and divergent validity than unsociability, although there is evidence of shared method variance for all constructs. Peers have the best combination of convergent and divergent validity, and parents, the worst; teachers, observers, and the self demonstrated mid-level validity.

Behavioral profiles of anxious solitary children and heterogeneity in peer relations.

Consistent with a holistic perspective emphasizing the integration of multiple individual characteristics within child systems, it was hypothesized that subgroups of anxious solitary (AS) children characterized by agreeableness, behavioral normality, attention-seeking-immaturity, and externalizing behaviors would demonstrate heterogeneity in peer relations and dyadic friendships. Sociometrics were collected for 688 3rd-grade children (mean age = 8.66 years, 51.5% female), and recess observations were obtained for a subset of 163 children. Results revealed that agreeable AS children demonstrated significantly superior relational adaptation relative to other AS children, whereas normative, attention-seeking-immature, and externalizing AS children demonstrated increasing relational adversity. Attention-seeking-immature AS children engaged in particularly high rates of directed solitary behavior and were most ignored by peers. Externalizing AS children were most often victimized by peers. Subgroup differences in sociometric peer adversity were qualified by sex.

Early Childhood Anxious Solitude and Subsequent Peer Relationships: Maternal and Cognitive Moderators.

It was hypothesized that the relation between early anxious solitude and subsequent peer relation would be moderated by early relational (maternal sensitivity) and individual factors (child school readiness). Participants were 1,364 children from the National Institute of Child Health and Human Development's Study of Early Child Care and Youth Development. Anxious solitude was assessed by child care providers from 2 to 4.5 years, maternal sensitivity was observed during mother-child interactions from 2 to 4.5 years, school readiness was tested at 3 years, children's interactions with a friend were observed at 4.5 years, and friendship quantity and peer rejection were assessed by first grade teachers. Results indicate that anxious solitary children who had experienced high versus low early maternal sensitivity contributed significantly more actively to positive interaction and less actively to negative interaction with a friend at 4.5 years (these results were contingent on school readiness), and had more friends and were less rejected by peers in first grade. Although high school readiness predicted interactive competency and positive peer relationships in children low in anxious solitude, these benefits were suppressed in anxious solitary children.

Class climate moderates peer relations and emotional adjustment in children with an early history of anxious solitude: a Child X Environment model.

Classroom emotional climate was hypothesized to moderate psychosocial adjustment in 1st grade for children with an early childhood history of anxious solitude. Participants were 1,364 children in the National Institute of Child Health and Human Development (NICHD) Study of Early Child Care and their mothers, child-care providers, and teachers. As anticipated, children with an early childhood history of anxious solitude were more rejected, poorly accepted (boys), and victimized (girls) by peers and demonstrated more depressive symptoms (girls) in 1st-grade classrooms with negative observed emotional climate. Results support a Child x Environment model of children's social and emotional adjustment.

Anxious solitude across contexts: girls' interactions with familiar and unfamiliar peers.

Cross-situational continuity and change in anxious solitary girls' behavior and peer relations were examined in interactions with familiar versus unfamiliar playmates. Fourth-grade girls (N=209, M age=9.77 years, half African American, half European American) were identified as anxious solitary or behaviorally normative using observed and teacher-reported behavior among classmates. Subsequently, girls participated in 1-hr play groups containing 5 same-race familiar or unfamiliar girls for 5 consecutive days. Results support both cross-situational continuity and change in anxious solitary girls' behavior and peer relations. Although anxious solitary girls exhibited difficulty interacting with both familiar and unfamiliar playmates relative to behaviorally normative girls, elements of their behavior improved in unfamiliar play groups, a context in which they received less peer mistreatment.

Moving toward and away from the world: social approach and avoidance trajectories in anxious solitary youth.

This investigation tested the person-by-environment hypothesis that the joint influence of behavioral vulnerability (anxious solitude) and interpersonal adversity (peer exclusion) predicts heightened social avoidance and depression over time. The study assessed 519 fifth and sixth graders 3 times during 1 year. Teachers reported social behavior and peer exclusion; youth reported depression. As hypothesized, anxious solitary youth displayed maintenance or exacerbation of social avoidance and depression in the context of high exclusion, but increased social approach and less depression in the context of low exclusion. Some effects were moderated by sex. The interaction of behavioral vulnerability and peer exclusion was more consistently linked to adjustment changes in anxious solitary youth than in youth with other behavioral profiles.

Anxious solitude and peer exclusion: a diathesis-stress model of internalizing trajectories in childhood.

A diathesis-stress model was proposed in which the joint forces of individual vulnerability (anxious solitude) and interpersonal adversity (peer exclusion) predict depressive symptoms in children over time. Children's (N = 388; 50% female) social behavior, peer exclusion, and emotional adjustment were assessed at kindergarten entry and every spring thereafter through 4th grade, primarily by teacher report. Results indicated that anxious solitude and peer exclusion co-occur in children soon after kindergarten entry and that anxious solitary children who are excluded early on, in comparison with their nonexcluded anxious solitary counterparts, display greater stability in their subsequent display of anxious solitude. As hypothesized, the joint influence of anxious solitude and exclusion predicted the most elevated depressive symptom trajectories.