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)

Second-, third-, and sixth-grade children (N=48) were presented sets of categorically-related pictures, were either prompted or not prompted to identify categories and later asked to recall categories. Recall time for second- and third-grade prompted children was significantly less than for nonprompted peers. No differences were found with sixth…

Derives two models for conceptualizing figure similarities from Piaget's developmental theory of spatial reference systems. An experiment on a two alternative forced-choice similarity matching task revealed age differences in observer dependence among children and young adults. Concludes that some Euclidian space concepts are achieved as formal…

Reviews two models of thinking and intellectual development: Scandura's deterministic model of structuralistic learning, and a generalization of Rasch's probabilistic latent trait model. Models are compared by means of two experiments with balance scale tasks. (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 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…

Three sources of variability in school achievement of children from demographically homogeneous families were identified: (1) socioeconomic status, (2) family configuration, which are direct and environmentally mediated effects of families' demographic characteristics, and (3) individual differences in the quality of the early environment. (RH)

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)