Sibling relationships are argued to offer a rich social context for the development of young children's theory of mind (ToM). There is evidence that the presence of siblings, particularly older siblings, may promote preschoolers' ToM, but it has not been investigated among toddlers. This study evaluated differences in early manifestations of ToM…

Observed 32 preschoolers' interactions with their toddler siblings. Preschoolers' references about emotions were more likely to be about the toddler than the self. Preschoolers who were skillful perspective takers talked more about internal emotional states and more frequently about the toddler and themselves than did poor perspective takers. (BC)