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…

This paper presents a cognitive theoretical framework for the learning of mathematics which has generic implications for other disciplines. The framework has been developed using a combination of established theories about learning and the authors' research into the understanding of some specific types of learning. It is based on the integration…

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)

This paper argues that morality is essentially a matter of rational reflection and judgment and has little to do with feelings or affections. The notions of reason and justification are analyzed. Four types of feelings are defined and shown to provide inadequate bases for moral judgment. (Author/SJL)

In a study to determine procedural effects of volume conservation tasks performed by adolescent females, the results revealed that the LaVatelli water displacement test was significantly more difficult than the Elkind test or Piaget's test. (Author/RL)

Three paper-and-pencil formal operations tests were administered to groups of eighth graders and adults. These measures provided scores that indicated each subject's level of reasoning for three second-order operations: combinations, proportionality, and propositional logic. (JMB)

A series of tests of dimensional understanding showed that there was a hierarchical sequence, with three year olds able to handle less complex tasks than four year olds. (Editor)

The study suggests that developing greater facility in linguistic skills may well produce greater cognitive differentiation and enhance the process of objectification. (Author)

Three experiments tested 3- and 4-year-olds' use of abstract principles to classify and label objects by shape or function. Findings indicated that 4-year-olds readily adopted either rule when instructed to match objects by shape or function, but 3-year-olds followed only the shape rule. Without a rule, 4-year-olds tended to match by shape unless…

This report proposes a modification of Jean Piaget's concept of "creative abstraction," the mechanism of creative thought, which develops both intelligence and creative ideas. By reflecting on one's actions and the coordinations of actions, the individual constructs new relationships, links, rules, or correspondences between and among them.…

A theory of adult cognitive development which includes two post-formal operational stages is described. The paper is divided into three sections. The first section provides background for discussion of the theory. A case study in which various employees in a hypothetical organization react to a problem is provided. Examples of pre-logical,…

Based on a set of theoretical assumptions relating to the cognitive modificability of low functioning adolescents, a program of Instrumental Enrichment was developed and implemented with 41 hearing impaired secondary students. The primary goals of Instrumental Enrichment included: (1) improving performance in spatial relations, (2) improving…