ABSTRACT: Guided by the conceptual frameworks of social withdrawal (Rubin, K. H., & Chronis-Tuscano, A. (2021). Perspectives on social withdrawal in childhood: Past, present, and prospects. Child Development Perspectives, 15(3), 160-167.) and emotion socialization (Eisenberg, N., Cumberland, A., & Spinrad, T. L. (1998). Parental socialization of emotion. Psychological Inquiry, 9, 241-273.; Morris, (A) S., Criss, M. M., Silk, J. S., & Houltberg, (B) J. (2017). The impact of parenting on emotion regulation during childhood and adolescence. Child Development Perspectives, 11(4), 233-238.), the current study examined multifaceted relations among temperamental shyness, peer competence, and loneliness and focused on the role of socializing and expressing positive emotion in middle childhood. Participants