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This study examined the link between classroom ethnic diversity, cross-ethnic friendships, and children's theory of mind. In total, 730 children in the United Kingdom (54.7% girls, 51.5% White) aged 8 to 13 years completed measures of theory of mind in 2019/2020. Controlling for verbal ability, executive function, peer social preference, and teacher-reported demographic characteristics, greater classroom ethnic diversity provided opportunities for cross-ethnic friendships, and children with cross-ethnic friendships performed better than peers without cross-ethnic friendships on theory of mind. These results extend accounts of intergroup contact by using direct assessments of children's theory of mind and advance social accounts of theory of mind by demonstrating how experiences outside the family are linked with theory of mind.

This study aimed to relate school diversity approaches to continuity and change in teacher-student relationships, comparing Belgian-majority (N = 1,875, M[subscript age] = 14.56) and Turkish and Moroccan-minority adolescents (N = 1,445, M[subscript age] = 15.07). Latent-Growth-Mixture-Models of student-reported teacher support and rejection over 3 years revealed three trajectories per group: normative-positive (high support, low rejection) and decreasing-negative (moderate support, high-decreasing rejection) for both groups, increasing-negative (moderate support, low-increasing rejection) for minority, moderate-positive (moderate support, low rejection) for majority youth. Trajectories differed between age groups. Student and teacher perceptions of equality and multiculturalism afforded, and assimilationism threatened, normative-positive trajectories for minority youth. Diversity approaches had less impact on majority trajectories. Normative-positive trajectories were related to improved school outcomes; they were less likely, but more beneficial for minority than majority youth.

Sperry, Sperry, and Miller (2018) aim to debunk what is called the 30-million-word gap by claiming that children from lower income households hear more speech than Hart and Risley ([Hart, B., 1995]) reported. We address why the 30-million-word gap should not be abandoned, and the importance of retaining focus on the vital ingredient to language learning--quality speech directed to children rather than overheard speech, the focus of Sperry et al.'s argument. Three issues are addressed: Whether there is a language gap; the characteristics of speech that promote language development; and the importance of language in school achievement. There are serious risks to claims that low-income children, on average, hear sufficient, high-quality language relative to peers from higher income homes.

There is an extensive body of work documenting the negative socioemotional and academic consequences of perceiving racial/ethnic discrimination during adolescence, but little is known about how the larger peer context conditions such effects. Using peer network data from 252 eighth graders (85% Latino, 11% African American, 5% other race/ethnicity), the present study examined the moderating role of cross-ethnic friendships and close friends' experiences of discrimination in the link between adolescents' perceptions of discrimination and well-being. Cross-ethnic friendships and friends' experiences of discrimination generally served a protective role, buffering the negative effects of discrimination on both socioemotional well-being and school outcomes. Overall, results highlight the importance of considering racial/ethnic-related aspects of adolescents' friendships when studying interpersonal processes closely tied to race/ethnicity.

This research tests how perceived school and peer norms predict interethnic experiences among ethnic minority and majority youth. With studies in Chile (654 nonindigenous and 244 Mapuche students, M = 11.20 and 11.31 years) and the United States (468 non-Hispanic White and 126 Latino students, M = 11.66 and 11.68 years), cross-sectional results showed that peer norms predicted greater comfort in intergroup contact, interest in cross-ethnic friendships, and higher contact quality, whereas longitudinal results showed that school norms predicted greater interest in cross-ethnic friendships over time. Distinct effects of school and peer norms were also observed for ethnic minority and majority youth in relation to perceived discrimination, suggesting differences in how they experience cross-ethnic relations within school environments.

The present study examined the interactive effects of school norms, peer norms, and accountability on children's intergroup attitudes. Participants (n = 229) aged 5-11 years, in a between-subjects design, were randomly assigned to a peer group with an inclusion or exclusion norm, learned their school either had an inclusion norm or not, and were accountable to either their peer group, teachers, or nobody. Findings indicated, irrespective of age, that an inclusive school norm was less effective when the peer group had an exclusive norm and children were held accountable to their peers or teachers. These findings support social identity development theory (D. Nesdale, 2004, 2007), which expects both the in-group peer and school norm to influence children's intergroup attitudes.

This study investigated contextual antecedents (i.e., cross-ethnic peers and friends) and correlates (i.e., intergroup attitudes) of social identity complexity in seventh grade. Social identity complexity refers to the perceived overlap among social groups with which youth identify. Identifying mostly with out-of-school sports, religious affiliations, and peer crowds, the ethnically diverse sample (N = 622; M[subscript age] in seventh grade = 12.56) showed moderately high complexity. Social identity complexity mediated the link between cross-ethnic friendships and ethnic intergroup attitudes, but only when adolescents had a high proportion of cross-ethnic peers at school. Results are discussed in terms of how school diversity can promote complex social identities and positive intergroup attitudes.

Children and adolescents evaluated group inclusion and exclusion in the context of generic and group-specific norms involving morality and social conventions. Participants ("N" = 381), aged 9.5 and 13.5 years, judged an in-group member's decision to deviate from the norms of the group, whom to include, and whether their personal preference was the same as what they expected a group should do. Deviating from in-group moral norms about unequal allocation of resources was viewed more positively than deviating from conventional norms about nontraditional dress codes. With age, participants gave priority to group-specific norms and differentiated what the group should do from their own preference about the group's decision, revealing a developmental picture about children's complex understanding of group dynamics and group norms. (Contains 6 figures.)

Extensive exposure to nonparental child care during the first 4.5 years of life has been demonstrated in some American studies to negatively affect children's socioemotional functioning. Data from 935 preschool children who averaged 54.9 (SD = 3.0) months of age, from Trondheim, Norway were used to examine whether such negative effects, would emerge in Norway, a country with a different child-care system. The children's externalizing problems and social competence were unrelated to their child-care experience. More time spent in child care during the first 4.5 years of life and experiencing peer groups of <16 or >18 children predicted greater caregiver-child conflict. The effect sizes were small. The results are discussed in terms of cross-national child-care differences.

This study explored whether early elementary school aged children's externalizing problems impede academic functioning and foster negative social experiences such as peer victimization, thereby making these children vulnerable for developing internalizing problems and possibly increasing their externalizing problems. It also explored whether early internalizing problems contributed to an increase in externalizing problems. The study examined 1,558 Canadian children from ages 6 to 8 years. Externalizing and internalizing problems, peer victimization, and school achievement were assessed annually. Externalizing problems lead to academic underachievement and experiences of peer victimization. Academic underachievement and peer victimization, in turn, predicted increases in internalizing problems and in externalizing problems. These pathways applied equally to boys and girls. No links from internalizing to externalizing problems were found. (Contains 4 tables and 2 figures.)

Exclusion and victimization by classmates were related to levels and diurnal change in cortisol in 97 fourth graders (53% boys, M = 9.3 years). Number and quality of friendships were considered as moderators. Salivary cortisol was collected 5 times daily on 2 school days. Excluded children had elevated cortisol levels at school and a flattened diurnal cortisol curve, suggesting hypothalamic-pituitary-adrenocortical (HPA) axis dysregulation. This effect was weaker for children with more friends or better friendships. Victimization was not associated with cortisol level or change. The results demonstrate the role of HPA activity in peer group processes and indicate that group and dyadic factors interact in predicting stress in the peer group.

The present study characterized prototypical patterns of development in self-reported externalizing behavior, between 12 and 22 years of age, within a community sample of 452 genotyped individuals. A Caucasian subset (n = 378) was then examined to determine whether their probabilities of displaying discrete trajectories were differentially associated with "CHRM2," a gene implicated in self-regulatory processes across a range of externalizing behaviors, and if affiliating with antisocial peers moderated these associations. Findings indicate that relative to a normative "lower risk" externalizing trajectory, likelihood of membership in two "higher risk" trajectories increased with each additional copy of the minor allelic variant at "CHRM2," and that this association was exacerbated among those exposed to higher levels of peer group antisocial behavior.

The effects of social group norms (inclusion vs. exclusion vs. exclusion-plus-relational aggression) and school norms (inclusion vs. no norm) on 7- and 10-year-old children's intergroup attitudes were examined. Children (n = 383) were randomly assigned to a group with an inclusion or exclusion norm, and to 1 of the school norm conditions. Findings indicated that children's out-group attitudes reflected their group's norm but, with increasing age, they liked their in-group less, and the out-group more, if the group had an exclusion norm. The school inclusion norm instigated more positive attitudes toward out-group members, but it did not moderate or extinguish contrary group norms. The use of school norms to counteract the effects of children's social group norms is discussed.

Does children's bias toward their own groups reflect egocentrism or social understanding? After being categorized as belonging to 1 of 2 fictitious groups, 157 six- to ten-year-olds evaluated group members and expressed preferences among neutral items. Children who expected the in-group to share their item preferences (egocentric social projection) showed intergroup bias. However, most bias was expressed by children who expected their in-group to share, but the out-group to oppose, their own evaluations of members. These oppositional expectations were associated with better social perspective taking, and better understanding that groups expect loyalty from their members. Consistent with the developmental model of subjective group dynamics (D. Abrams, A. Rutland, J. Pelletier, & J. M. Ferrell, 2009), social understanding, rather than egocentrism, provides a more parsimonious explanation of children's intergroup bias.

With a sample of African American and European American 3rd- and 4th-grade children (N = 486, ages 8-11 years), this study examined classroom ethnic composition, peer social status (i.e., social preference and perceived popularity as nominated by same- and cross-ethnicity peers), and patterns of ethnic segregation (i.e., friendship, peer group, and cross-ethnicity dislike). African American--but not European American--children had more segregated relationships and were more disliked by cross-ethnicity peers when they had fewer same-ethnicity classmates. African American children's segregation was positively associated with same-ethnicity social preference and perceived popularity and with cross-ethnicity perceived popularity. European American children's segregation was positively associated with same-ethnicity social preference but negatively associated with cross-ethnicity social preference and perceived popularity.

The issue of informant discrepancies about child and adolescent functioning is an important concern for clinicians, developmental psychologists, and others who must consider ways of handling discrepant reports of information, but reasons for discrepancies in reports have been poorly understood. Adolescent attachment and informant depressive symptoms were examined as 2 explanations for absolute and directional discrepancies about adolescent symptoms, relationships, and social behavior in a sample of 189 eleventh-grade students (mean age = 16.5 years). Adolescent attachment predicted absolute discrepancies, with greater attachment coherence associated with fewer discrepancies in reports of adolescent depressive symptoms, parent-adolescent conflict, and adolescent externalizing behavior. Parents' but not adolescents' depressive symptoms sometimes predicted absolute discrepancies. Mothers' depressive symptoms and adolescent attachment predicted the direction of discrepancies for mother-peer reports only.

Studies show that children who use relational aggression process social information in unique ways; however, findings have been inconsistent and limited by methodological weaknesses. This short-term longitudinal study examined developmental changes in 245 (49% female; ages 8-13) 3rd through 8th graders' normative beliefs about relational aggression and tested the hypothesis that individual and classroom-level norms predict relational aggression 1 year later. Results showed that the transition to middle school was marked by increased approval of relational aggression, and individual norms predicted future relational aggression. Importantly, a contextual model showed that students in peer groups highly supportive of relational aggression became increasingly aggressive. Findings extend social information processing theories of relational aggression to focus on the role of peer group cognitions.

Tattling, defined as the reporting to a second party of norm violations committed by a third party, is a frequent but little-studied activity among young children. Participant observation and quantitative sampling are used to provide a detailed characterization of tattling in 2 preschools (initial mean age = 4.08 years, N = 40). In these populations, tattling represents the majority of talk about peers' behavior to third parties. It is usually truthful, it rarely refers to transgressions committed against other individuals, it is not often ignored by adults, it is performed more frequently by dominant children, and it correlates with teacher reports of relational aggression. These exploratory results suggest several new avenues of research into children's developing understanding of social norms.

In Study 1, 167 English children aged 6-8 or 9-11 evaluated peer English or French soccer fans that were loyal or partially disloyal. In Study 2, 149 children aged 5-11 made judgments about generic inclusion norms between and within competitive groups. In both studies, children's understanding of intergroup inclusion/exclusion norms (group nous) was predicted by theory of social mind (a social perspective taking measure) but not multiple classification skill. In Study 2, the number of groups children belonged to (an index of peer group experience) also predicted group nous. Supporting the developmental subjective group dynamics model ( D. Abrams, A. Rutland, & L. Cameron, 2003), children's experience and perspective taking help them make sense of inter- and intragroup inclusion and exclusion.

Girls have caught up with boys in math course taking in high school but reasons for taking math still differ by gender. This study, therefore, investigated gender differences in the linkage between peer relations and math course taking by applying multilevel modeling to a nationally representative data set that includes peer networks and school transcripts (N = 6,457 American 9th to 11th graders, aged 13-19). For all adolescents, math course taking was associated with the achievement of their close friends and, to a lesser extent, their coursemates. These associations tended to be stronger toward the end of high school and weaker among adolescents with a prior record of failure in school. Each of these patterns was somewhat more consistent among girls.

This longitudinal study examined, in a sample of Chinese children (initial mean ages = 9.5 and 12.7 years, N = 505), how the peer group contributed to social functioning and academic achievement and their associations. Data on informal peer groups, social functioning, and academic achievement were collected from multiple sources. Multilevel structural equation modeling revealed that group academic performance made direct contributions to children's social development. Group academic performance also moderated the individual-level relations between academic performance and later social functioning. Whereas high-achieving groups strengthened the positive relations between academic achievement and social competence, low-achieving groups facilitated the negative relations between academic achievement and social problems. The results indicate the significance of the peer group for social functioning from a developmental perspective.

This study examined how the link between neighborhood poverty and the timing of sexual initiation varies as a function of age, gender, and background characteristics. A sample of N = 2,596 predominately White Canadian adolescents from the National Longitudinal Survey of Children and Youth was used. Sexual initiations occurring between 12 and 15 years old were considered. Results showed that younger adolescent females who lived in poor neighborhoods and who had a history of conduct problems were more likely to report early sexual activity. Peer characteristics partly accounted for this susceptibility. Among adolescent males, no direct neighborhood effects were found, but those who had combined risks at multiple levels appeared more vulnerable. The theoretical and practical implications of these findings are discussed.

A sample of 398 children was followed up from ages 5 to 12 to investigate the relation between peer group rejection and classroom participation. The participation trajectories of individuals and groups of children who were rejected for differing periods of time were examined both during and after rejection using piecewise growth curve analyses. The results showed that whereas during periods of rejection, children exhibited negative or negligible growth in participation, when nonrejected, they manifested positive growth. These findings corroborated the hypothesis that (a) peer rejection creates constraints that inhibit children's classroom participation and (b) the cessation of rejection enables children to become more active and cooperative participants in classroom activities.

Group status was examined as a moderator of peer group socialization of deviant, aggressive, and prosocial behavior. In the fall and 3 months later, preadolescents and early adolescents provided self-reported scores for deviant behavior and group membership, and peer nominations for overt and relational aggression, prosocial behavior, and social preference. Using the social cognitive map, 116 groups were identified involving 526 children (282 girls; M age = 12.05). Hierarchical linear modeling revealed that high group centrality (visibility) magnified group socialization of relational aggression, deviant behavior, and prosocial behavior, and low group acceptance magnified socialization of deviant behavior. Results suggest group influence on behavior is not uniform but depends on group status, especially group visibility within the larger peer context.

This study examined the effects of peer groups on changes in academic engagement in 11- to 13-year-old children. From the entire cohort of 366 sixth graders in a town, 87% participated at the beginning and end of the school year. Peer groups were assessed using socio-cognitive mapping; as an indicator of motivation, teachers reported on students' classroom engagement. Peer groups were homogeneous in terms of engagement, and despite considerable member turnover across time, their motivational composition remained fairly intact. Peer group engagement levels in the fall predicted changes in children's motivation across time. Although the magnitude of effects was relatively small, evidence for group influences persisted when controlling for peer selection and the influence of teacher and parent involvement.

A social developmental framework was applied to test for the socialization of homophobic attitudes and behavior within adolescent peer groups (Grades 7-11; aged 12-17 years). Substantial similarity within and differences across groups were documented. Multilevel models identified a group socializing contextual effect, predicting homophobic attitudes and behavior of individuals within the group 8 months later, even after controlling for the predictive effect of individuals' own previously reported attitudes and behavior. Several group characteristics moderated the extent to which individuals' previously reported attitudes predicted later attitudes. Findings indicate the need to integrate the concurrent assessment of individual and social factors to inform the construction of more comprehensive models of how prejudiced attitudes and behaviors develop and are perpetuated.

The monozygotic (MZ) twin differences method was used to examine nonshared environmental aspects of the association of parenting (punitive and constructive discipline), negative life events (independent and dependent), and peers (antisocial and prosocial) with adolescent depressive symptoms in terms of sequelae, risk, and maintaining factors. Two self-report booklets were completed by 328 MZ twin pairs aged 1219 years, 6 months apart. Increased punitive discipline and negative life events were found to be relevant nonshared environmental factors that followed depression. Negative life events were the only factor that had a direct nonshared environmental association with concurrent depressive symptoms in adolescents independent of previous depressive symptoms, and all other study variables.

This 2-year longitudinal study examined, in a sample of Chinese children (initial M age=11 years), the moderating effects of the peer group on relations between maternal supportive parenting and social and school adjustment. Data were collected from multiple sources including peer assessments, teacher ratings, school records, and maternal reports. It was found that whereas group prosocial-cooperative functioning strengthened the role of supportive parenting in helping children develop social and school competence, group antisocial-destructive functioning undermined the contributions of supportive parenting to children's social and academic achievement. The results indicated the significance of the peer group as a social context for socialization and development in Chinese children.

Examined peer group contextual effects of aggressive behavior among middle school students. Found substantial within-group similarity on self-reported bullying and fighting, suggesting that students affiliate with individuals who bully and fight at the same frequency as they. Peer group bullying and fighting were associated with individual-level behavior, even after controlling baseline levels for males and females. However, peer contextual effects explained more variance in individual bullying than individual fighting. (Author/KB)

This study examined how children's play varied as function of child's sex, play partner's sex, and whether they played in dyads or groups. Observation data revealed that boys' same-sex play was more active-forceful, farther from presence of adults, and more stereotyped than girls', a pattern exaggerated in groups. Mixed-sex play was more likely than other configurations to occur near adults and was intermediate in active-forceful and stereotyped activities. (Author/KB)

Investigated the relationship between peer group identification and similarity between individuals involved in problem behavior, and whether group identification moderated group influence on development of delinquent behavior among Italian sixth- and seventh-graders. Found that group behavior interacted with reciprocity of group nominations in predicting individual behavior, while group identification moderated peer influence on the individual's change in delinquency. (JPB)

Examined genetic and environmental contribution to self-reported peer-group characteristics among adoptive and nonadoptive adolescent sibling pairs. Found that although peer preference is influenced, in large part, by nonshared environment factors, genetic influence is present. Substantial genetic influence emerged for college orientation, and genetics were implicated for peer popularity for twins but not for non-twin siblings. (JPB)

Used social network analysis to investigate the peer group as context for socialization of young adolescents' school motivation and achievement. Found that students' Fall peer context predicted changes in liking and enjoyment of school and achievement over the year. Students' peer context was unrelated to changes in their beliefs about the importance of school or expectancies for academic success. (Author/KB)

Examined antecedents and moderators of antisocial behavior among children interviewed annually through high school and in early adulthood. Analyses identified four configurations differing in early school dropout and criminal arrests. School extracurricular activity participation related to reduced rates of early dropout and criminal arrest among high-risk children. Decline in antisocial patterns depended on social network participation in extracurricular activities. (Author/KB)

Studied the ability of measures of inhibition to unfamiliar events that are obtained in toddlerhood to predict social behaviors during an interaction with an unfamiliar peer at the age of five years. Results revealed that the role of child inhibition as a predictor of social behavior may be more evident during the initial encounter with the peer. (GLR)

Second and third grade guests were observed while they tried to join peer hosts who were playing a game. Females guests were less obtrusive than male guests in their entries, and males guests were more assertive. Guests were less constrained when approaching same-sex than opposite-sex hosts. Female hosts were more attentive to guests than were male hosts. (BC)

Aggressive data from four experimental play groups of seven- and nine-year-old black males were coded to examine whether qualitative aspects of aggression serve to distinguish among the behavior patterns displayed by the groups. Found that age makes a great deal of difference in these behavior patterns. (Author/GLR)

A group of 91 fifth and sixth graders kept diaries of liked and disliked peer behaviors and important peer activities for a week. Another group of 81 fifth and sixth graders rated the importance and prevalence of each activity and indicated most liked and disliked positive and negative behaviors. Three main functions were evident. (RH)

Obtains standardized parent and teacher behavior ratings of neglected and rejected 8- to 11-year-old boys and girls. No age or sex differences were found. Rejected children were found to exhibit more behavior problems on both scales than neglected, popular, or average children. (Author/AS)

Reveals no gender segregation in peer groups until age six, through observations of 152 rural Kenyan children, 18 months to nine years of age. Developmental trends in gender segregation of children's peers are correlated with systematic changes in their environments. (Author/AS)

Establishes a criterion for and assesses the incidence of friendship among preschoolers. Factors affecting the formation of close association and the consistency of children's interactions with friends and nonfriends were also analyzed. (Author/AS)

Assessed contributions of familiarity, prior experience, and age to frequency and degree of social participation of preschoolers. Normative analysis of group differences indicated that sex, age, prior peer-group experience, and familiarity did not interact and that all of them independently affected 3- and 4-year-old preschoolers' social play. (Author/BE)

Examines extent to which second- and fifth-graders use social comparison information to evaluate themselves. Results indicate that fifth-, but not second-graders, made appropriate evaluations of their abilities on the basis of variations in relative performance and compensated for time differences. (Author/BE)

Results generated by peers, teachers, and unbiased observers converged in some behavioral domains and diverged in others. All three sources provided similar pictures of the relation between aggression and status, although observations of third grade boys did not yield sufficient frequencies of aggression to allow meaningful conclusions. (RH)