A total of 192 second- to sixth-grade children, showing three different levels of class-inclusion answers (failure, correct answer based on counting, correct answer based on logical reasons), performed four necessity tasks. Results are discussed with reference to individual and constructive generalization processes. (Author/RH)

On the basis of a study involving 40 first-grade students, compares Pascual-Leone's and Keating and Bobbitt's developmental theories of information processing by contrasting their predictions about a classification task. Results falsified Keating and Bobbitt's model. Predictions from Pascual-Leone's theory were almost wholly confirmed. (RH)

Pairs of elementary school children at different concept development levels were given problems to discuss, in order to examine the prediction, derived from the equilibration model, that when two children holding different beliefs must arrive at a consenus, the child possessing the higher level of cognitive development will prevail over the child…

Examined the ability of children from 6 to 12 years of age to draw human figures and to reconstruct the drawing abilities they possessed at earlier ages. Found that diachronic thinking, or the ability to understand a present situation as a stage in an evolving process, developed with age. (MDM)

Examined the relationship between 7-, 9-, and 11-year old children's performance on a battery of selected Piagetian measures and on a proportional reasoning task. Found a strong relationship between stage level and (1) the complexity of hypotheses used, (2) the use of the proportional hypothesis, and (3) the overall use of logical hypotheses. (HOD)

Examined the accuracy with which parents judged their children's preferences, and the relationship between parental accuracy and children's cognitive performance. Mothers were more accurate than fathers; parents of fifth graders were more accurate than parents of second graders. The accuracy of parents' predictions was related to children's…

Used a Jewish Rating Scale and Piagetian scale to investigate the influence of intellectual growth on ethnic self-definition and the meaning of Jewishness to Jewish children in Israel. Found a high positive correlation between children's age and the mode of their definition of their Jewishness. (Author/BB)

Measured physical and cognitive development of 7- to 10-year-old Brazilian children in 3 social groups. Domestic servants' children were taller and heavier than children in slums, and shorter than middle-class children. Domestic servants' sons scored similar to slum-dwelling boys on cognitive measures. (BC)