At the beginning of preschool (M = 46 months of age), 197 (94 boys) children were administered tasks that assessed a suite of nonsymbolic and symbolic quantitative competencies as well as their executive functions, verbal and nonverbal intelligence, preliteracy skills, and their parents' education level. The children's mathematics achievement was…

This study examined the relation between symbolic play training and conservation in 30 middle-class nonconserving 4-year-old children. Results showed that 13 experimental subjects manifested some change in solving conservation problems after symbolic play training while only one control subject showed any change toward conservation on the…

Results of two experiments support the view that logical development can occur when there is no direct internalization of a societal language and that deaf adolescents are capable of propositional thought despite their language deficiency. (Author/WY)

Explores the relations among combinatorial capacities in language, symbolic play, blockbuilding, and nonsemantic action sequences within a sample of 18- to 24-month-old children, as well as assessing the developmental level of a selected subset of concepts. (HOD)

Describes two studies in which young children were shown pictures that represented sound with postures and contexts, with conventions, and with combinations of information. Shows that the different types of pictorial representation of sound were not equivalent in their ability to evoke a correct interpretation. (HOD)