Young children's emotional competenceregulation of emotional expressiveness and experience when necessary, and knowledge of their own and other's emotions-is crucial for social and academic (i.e., school) success. Thus, it is important to understand the mechanisms of how young children develop emotional competence. Both parents and teachers are considered as important socializers of emotion, providing children experiences that promote or deter the development of emotional competence. However, compared to parents, early childhood teachers' roles in socializing young children's emotional competence have not been examined. Based on the findings from research on parental socialization of emotion, in this theoretical review we explore possible teacher roles in the development of young children's emotional competence. Additionally, we suggest future research focusing on early childhood teacher socialization of emotion, and discuss theoretical and practical benefits of such research.

This paper provides an overview of methodological challenges related to the epidemiological assessment of social-emotional development in children. Because population-based studies involve large cohorts and are usually multicentre in structure, they have cost, participant burden and other specific issues that affect the feasibility of the types of measures that can be administered. Despite these challenges, accurate in-depth assessment of social-emotional functioning is crucial, based on its importance to child outcomes like mental health, academic performance, delinquency and substance abuse. Five dimensions of social-emotional development in children are defined: (1) social competence; (2) attachment; (3) emotional competence; (4) self-perceived competence; and (5) temperament/personality. Their measurement in a longitudinal study and associated challenges are discussed. Means of making valid, reliable assessments while at the same time minimising the multiple challenges posed in the epidemiological assessment of social-emotional development in children are reviewed.

Examined how aspects of social-emotional learning (SEL)—specifically, emotion knowledge, emotional and social behaviors, social problem-solving, and self-regulation—clustered to typify groups of children who differ in terms of their motivation to learn, participation in the classroom, and other indices of early school adjustment and academic success. 275 four-year-old children from private day schools and Head Start were directly assessed and observed in these areas, and preschool and kindergarten teachers provided information on social and academic aspects of their school success. Three groups of children were identified: SEL Risk, SEL Competent-Social/Expressive, and SEL Competent-Restrained. Group members differed on demographic dimensions of gender and center type, and groups differed in meaningful ways on school success indices, pointing to needed prevention/intervention programming. In particular, the SEL Risk group could benefit from emotion-focused programming, and the long-term developmental trajectory of the SEL Competent-Restrained group requires study.

Preschoolers (N= 322 in preschool, 100 in kindergarten) were assessed longitudinally to examine the self-regulatory roots of emotion knowledge (labeling and situation) and the contributions of emotion knowledge to early school adjustment (i.e., including social, motivational, and behavioral indices), as well as moderation by age, gender, and risk. Age, gender, and risk differences in emotion knowledge were also examined. Emotion knowledge skills were found to be more advanced in older children and those not at economic risk, and in those with higher levels of self-regulation. Overall, the results support the role of emotion knowledge in early school adjustment and academic success even with gender, age, and risk covaried, especially for boys, older preschoolers, and those at economic risk.

Social-emotional behavior of 352 3- and 4-year-olds attending private child-care and Head Start programs was observed using the Minnesota Preschool Affect Checklist, Revised (MPAC-R). Goals of the investigation included (a) using MPAC-R data to extract a shortened version, MPAC-R/S, comparing structure, internal consistency, test-retest reliability, and stability of both versions; and, using the shortened measure, to examine (b) age, gender, and risk status differences in social-emotional behaviors; (c) contributions of emotion knowledge and executive function to social-emotional behaviors; and (d) contributions of social-emotional behaviors to early school adjustment and kindergarten academic success. Results show that reliability of MPAC-R/S was as good, or better, than the MPAC-R. MPAC-R/S structure, at both times of observation, included emotionally negative/aggressive, emotionally regulated/prosocial, and emotionally positive/productive behaviors; MPAC-R structure was similar but less replicable over time. Age, gender, and risk differences were found. Children's emotion knowledge contributed to later emotionally regulated/prosocial behavior. Finally, preschool emotionally negative/aggressive behaviors were associated with concurrent and kindergarten school success, and there was evidence of social-emotional behavior mediating relations between emotion knowledge or executive function, and school outcomes. The importance of portable, empirically supported observation measures of social-emotional behaviors is discussed along with possible applications, teacher utilization, and implementation barriers.