Examined whether 2-year-olds can learn a novel part name of an unfamiliar object when adult demonstrates action upon object. Asked 24 Japanese 2-year-olds to choose referent for a whole object and part of the object in forced choice tests. Found that young children are able to override whole object assumption when actions of parts of objects are…

The present study assessed mastery behaviors in toddlers with physical impairment during object and social play interaction with their parents. Poor mastery motivation in object play of children with physical impairments has been attributed to difficulty in independently structuring tasks, limited experience in play effectiveness, and frequent…