This study aims to identify early childhood sociability trajectories and examine their longitudinal associations with behavior problems. Using a population-based data set presented by the Panel Study on Korean Children, sociability trajectories from age 2 to age 4 were identified by latent class growth analysis. Associations between sociability…

Research Findings: The transition to kindergarten has important ramifications for future achievement and psychosocial outcomes. Research suggests that physical aggression may be related to difficulty during school transitions, yet no studies to date have examined the role of relational aggression in these transitions. This article examines how…

Research Findings: Minor illnesses, such as upper respiratory infections, stomachaches, and fevers, have been associated with children's decreased activity and increased irritability. This multi-method investigation of 110 day care-attending children examined whether experience with recurrent, minor illnesses and negative emotionality worked…

Parents and teachers reported that 6- to 8-year-old boys with developmental delays were less able to regulate their emotions than nondelayed boys matched on chronological age. Compared to nondelayed boys, boys with developmental delays had more social problems, which persisted and increased over a 3-year period. Children's ability to regulate…

Examined how aspects of preschoolers' peer-conflict behavior varied according to partner. Found that initiating and negotiating behavior in early sessions better predicted behavior in the fourth session for the same-partner versus change-partner group. Results indicated that much of preschoolers' conflict behavior was sensitive to influences…

Studied social interaction among a sample of children at risk for the development of later and more severe behavioral-control difficulties. Observed 121 children in pairs. Found that children in the high-risk group displayed significantly and consistently more aggressive behavior than did the children in the low-risk group. (JS)

This literature review examines the ways in which children's personal premise systems concerning the nature of relationships develop through the process of attachment to the caregiver. The manner in which the premise system becomes a generalized model of self and others is considered. (Author/GLR)

Tested a proposed developmental pathway for toddlers' mastery of skills in generating non-ritualized forms of cooperative coordinated action with peers. Studied nonverbal imitative acts among U.S. toddlers and toddlers of the Seltaman people of Papua New Guinea. Found that ready imitation of one another emerged during the same developmental period…