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…

Three studies examined preschoolers' use of desires to solve theory of mind problems. Findings indicated that even young children could correctly attribute a false belief to an agent when that belief was about the status of a pretense. Subjects found it easier to attribute a false belief when the desires of the agent were eliminated. (Author/KB)

Used home observations and laboratory procedures with 85 Chilean mothers and infants to examine the association between infants' chronic undernutrition and maternal sensitivity, sociodemographic variables, and infants' play and problem solving. Found that maternal sensitivity was correlated with maternal education, maternal weight, marital…