Individual differences in young children's pretend play with mother and sibling: links to relationships and understanding of other people's feelings and beliefs.

50 33-month-old children were observed at home with their siblings and mothers. Observational measures of pretend play, observer ratings of the child's, mother's, and sibling's behavior, and measures of family discourse about feelings were collected. At 40 months each child was assessed on Bartsch and Wellman's false beliefs task and Denham's affective perspective taking task. Results revealed individual differences in the amount and sophistication of young children's social pretend play and suggested that these individual differences are related to experiences in the relationships that young children have with their mothers and siblings. Results also indicated that early social pretend play was significantly related to the child's developing understanding of other people's feelings and beliefs. The data are interpreted as providing support for the notion that early experience in social pretense is associated with children's mastery of the relation between mental life and real life. The importance of considering the relationship context of social pretense is also discussed.