The relationship between language and symbolic play was studied in a sample of children identified as referential in style (multiple noun utterances exceeded pronoun or no-noun utterances), as compared with a sample identified as expressive in style (pronoun utterances or no-noun utterances exceeded multiple noun utterances). Children were…

This study tested certain implied predictions regarding conceptual learning at each of four sequential levels of development: concrete level, identity level, classificatory level, and formal level. For this purpose, scaled batteries to assess the level of conceptual development of children, kindergarten through high school, were constructed and a…