Twenty-one male and 21 female adolescents were tested individually for conservation of mass, weight, and volume. (CM)

Kindergarten children were administered tests of inductive reasoning and field dependence and a series of perceptual egocentrism tasks. Results confirm a positive relation between field dependence and perceptual egocentrism; they also question the validity of the field-dependence construct in early childhood. (GO)

Experiment designed to answer questions regarding the correspondence between concrete and abstract actions. (Author/CB)

Results indicated that progress through adolescence leads to greater differentiation, abstraction, and integration. The emergence of the ability to abstract was considered the most important cognitive development in the adolescent's self-system. Major transformations appeared after age 15. (Author/DB)

Reports a study involving 35 learning-disabled boys attending full-time remedial schools and 35 matched normal achievers to investigate whether learning-disabled children differ from normal achievers in terms of logical thought and whether they exhibit decalages in their acquisition of Piagetian concepts. (BD/BR)

This study was designed to test the hypothesis that coding used for recall is a dynamic process that changes in accordance with operational structures. Fifty male and female university students participated in two task sessions: (1) Formal operations and recall and (2) recall one month later. Significant correlations supported the basic…