Toddlers with an older sibling with autism spectrum disorder (ASD) and low risk (LR) toddlers with typically-developing older siblings were observed during free play with a parent and elicited pretend with an examiner at 22-months. Functional and pretend play, children's social engagement, and parent sensitivity were assessed during free play.…

Children's ability to produce integrated sequences of discrete behaviors was examined as a function of age and task demands for several behavioral domains. Results are discussed in terms of possible age-related constraints on combinatorial skills that operate at a general, cross-domain level during toddlerhood. (RH)

Studied frequency and style of help-seeking in 18- and 24-month olds observed at free play and problem-solving. Found that younger toddlers sought less help than older toddlers; both groups sought more help during problem solving than in free play. Older toddlers increased vocal help-seeking whereas younger toddlers sought help through vocal and…

Development of toddlers' combinatorial skills was examined in the domains of object manipulation, symbolic play, motor imitation, language, and peer interaction. Additionally, task demands that might produce variations in age-related patterns within or between domains were examined. Data were collected in free play sessions and during structured…

On the basis of two sets of videotaped observations collected on same-sex, same-age and mixed-age dyads composed of children 18 and/or 24 months old, issues concerning research on infants and toddlers are addressed. The first set of observations was a simple description of the structure and content of children's peer interaction during 15 minutes…