This paper describes six experiments performed to investigate elementary school childrens' understanding of a proportionality concept, the concept of fullness. (CM)

Reviews a model of cognitive development relating the self and self-evaluation, guidelines for applying the model, and counseling applications. Recognizes that individuals may vary their level of abstraction depending on such things as the source of information, the context, and the part of the self being discussed. (LLL)

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

This paper examines the nature of concepts and conceptual processes and the manner of their formation. It argues that a process of successive abstraction and systematization is central to the evolution of conceptual structures. Classificatory processes are discussed and three levels of abstraction outlined. (Author/SJL)

Used a pretest/post-test control group design involving 44 female adolescent subjects to determine whether Moral Stage 3 subjects who have attained early basic formal operations are more susceptible to attempts to stimulate moral development than Stage 3 subjects who have attained only beginning formal operations and lack the cognitive…

Visual learning enhances cognitive understanding of abstract concepts. Perception of such ideas as causality is enriched by visual examples. Perceiving should not be separated from thinking. (SK)

Piaget's studies clearly highlight two qualitative advances made during the preoperational period. The first is the breakthrough of representational intelligence, beginning around 2 years of age. The second is the emergence of coordinated representational thought, beginning around 4 years of age. This paper focuses on the second advance, which…

A study investigating developmental differences in the ability to reason with conditional propositions used five variations of Wason's selection task to assess conditional reasoning in 132 eighth, tenth, and twelfth grade adolescents. In addition to examining developmental differences, the study had as an objective to examine the role of semantic…

The article describes research which attempted to discover whether emotionally disturbed children functioned at Piagetian levels of abstract thought similar to normal children. (CD)

Jean Piaget's theory of genetic epistemology is criticized from a philosophical point of view. (JD)

Explores the hypothesis that there is a decline in operational thought ability in the elderly. Two samples of elderly males, with mean ages of 71.80 and 74.29 years respectively, were tested for their ability to conserve mass, surface areas and volume. (BD)

A sample of 144 children from nursery school, first, and third grades were given a series of problems in which they were required to judge which of 2 synchronous events was longer in duration and to rationalize their judgments. (Author/JMB)

Used single-subject analyses to examine the developmental difficulty of the ulterior motive question (the backward inverse inference) in five- and seven-year-olds. Results suggest that children's difficulties with ulterior motive information result both from the abstract nature and the logical form of the task. (Author/SKC)

A study of 240 students in grades 4-10 found that fourth graders performed well on a proverb comprehension task involving contextual information, refuting earlier findings that preadolescents interpret proverbs literally. Performance was found to improve steadily through grade eight and was correlated to performance on a perceptual analogical…