Analyzes and compares the exploration, play, and problem-solving activities of typically developing (average) and at-risk infants when they manipulate novel objects. (BB)

Explored interrelationships among day-care experience, temperament, and preschoolers' social behaviors in a peer play laboratory. Found that sex predicted both aggressive and prosocial behaviors, and daycare inhibited socialization for some children. Findings suggest that variables of temperament and day-care experience are important to consider…