Three experiments involving balance scale problems were used to characterize and explain developmental differences in three domains of children's thinking: existing knowledge about the problems, ability to acquire new information about them, and process-level differences underlying developmental changes in the first two areas. (BW)

Formal and familiar materials were used to test Piagetian classification and formal operational abilities in two groups of educated adults: one group aged 30-38 and the other aged 57-82 years. Subjects did not show mastery of the tasks. Results suggest a new model of cognitive lifespan development. (Author/MS)

Preschool, first-grade, and fifth-grade children served as Ss in 2 experiments designed to test the developmental hypothesis that memorizing and perceiving are functionally undifferentiated for the young child, with deliberate memorization only gradually emerging as a separate and distinctive form of cognitive encounter with external data.…

Testing Pollack's hypothesis that decreases in effective contour contrast (resulting from a decrease in receptor sensitivity with age or from a change in actual stimulus contrast) lead to decreases in illusion magnitude. Conclusions are questioned by Sjostrom and Pollack (PS 501 740). (Author/MB)

This study compared affective responses to written and oral presentations of triadic situations of three groups: fourth graders (concrete operational), eighth graders, and freshmen in college (formal operational) to see whether the variation in stimulus mode produces a different kind of response in the eighth graders. (Author/NH)

Provides direct evidence of developmental differences in the processing of item-specific information, discussing how these differences affect recognition as well as recall performance in second graders, fifth graders, and college adults. Results suggest that retention varies as a result of the degree to which children differ from adults in…

Describes components contributing to memory development, including: (1) capacity or processing allocation features of the information processing system; (2) strategies or control processes for problem solving; and (3) knowledge or semantic features acquired through experiences. Empirical evidence is reviewed supporting the psychological reality of…

Examined whether children (ages 4-5) were, like adults, capable of using precued information to preselect a response and remember it briefly. Findings suggest that the 10 preschoolers could preselect a response and maintain it for about one second, but they had difficulty over a 3- or 5-second delay. (Author/SJL)

Three experiments were conducted to examine children's use of multiplying and proportionality rules in judgments of area. In the first two experiments, 7- through 8-year-olds were asked to judge the area of rectangles. In the third, 8- through 11-year-olds were tested on ratio of a rectangle compared to a horizontal line. Results indicated…

To examine developmental aspects of auditory sensory memory, a series of experiments was conducted on the stimulus suffix effect with the primary variables being age of subject (7 and 11 years), rates of presentation, and length of list. Effects were nearly identical across age groups when a fast presentation rate was used. (Author/DB)

Reevaluates literature on the development of transitive inference in light of theoretical and methodological criticisms, and examines two aspects of the Piagetian account of the development of this cognitive ability. Criticism leveled is based on the observations that ability to make transitive inferences is not age-related and that children and…