Studied 49 3 and 4 year olds in an examination of the effect of type of reward agent on children's discounting. Findings indicated that the combination of a negative valence and a particular social role accounted for the discounting of intrinsic interest. This suggests that social knowledge guides the application of the discounting schema. (SH)

Notes advantages of using dynamic models to understand cognitive functioning: (1) they are specifically intended to represent changes that systems undergo as they evolve; (2) they can capture change in a continuous fashion; (3) they can account for development of behavior that appears orderly at times and disorderly at others, and (4) chaotic…

Examines the relationship between visual attentiveness, search behavior, and duration of independent mobility for 56 eight-to ten-month-old infants when presented with three versions of the Piagetian Stage IV object permanence task. (HOD)

Results indicated that different types of play environment strongly influence preschool children's types of social play and play group size. Differences in cognitive level and social egocentrism influenced the choice of play environment. (Author/DB)