Explores age differences in children's conceptions of play, pretending, and toys. Examines parallel structural changes in other areas of development, such as language acquisition. Subjects for the study were 5-, 7-, 9-, and 11-year-old children. (BD)

Learning of the concept of horizontality by fourth graders was investigated. Comparisons by age and sex were made. (BB)

Points out that an aspect of Piaget's theory, the concept of stage, is being misrepresented through vague and incorrect use of the idea. (Author/GA)

Data were collected on tactics used when making a sequence of set comparisons in terms of more or equal number. (MP)

Examined the development of stable concepts of "boy" and "girl" in kindergarteners and first and second graders. Gender constance was explored in relation to: performance on conservation tasks; application of gender label to self or other; application of gender label to live person or pictorial representations; and sex role…

The generally bleak achievement scores of deaf children are contrasted with the near normal reports of both IQ and conceptual development. (Author)

Questions Piagetian theory that dismisses the idea of accelerating cognitive development through classroom activities. (CP)

Examination of object word learning and use in beginning (vocabulary of less than 50 words) and advanced (vocabulary of more than 50 words) infant speakers indicated that both groups formed concepts, learned, and generalized words for the to-be-learned objects. Advanced speakers learned more words and concepts and engaged in broader generalization…

Three experiments investigated five- and 10-year-old children's understanding of the conditions under which a person becomes committed to carrying out an intended action. Findings indicated that, although children from a very early age have the concept of commmitment, the understanding of the interpersonal conditions for becoming committed…

Summarizes recent research which attempted to discover what children of different ages know about the appearance-reality distinction and related phenomena. Findings show that what helps children grasp the distinction is an increased cognizance of the fact that people are sentient subjects who have mental representations of objects and events. (PS)

Evaluates some possible reasons for the occurrence and eventual correction of children's naming errors in an experiment in which two-, four-, and six-year-olds learned two artificial object names in succession. (HOD)

Compares two types of semantic development (the acquisition of disappearance words and success-failure words) to performance on two types of cognitive tasks (object-permanence and means-ends tasks) among infants. (HOD)

How multiplication is usually taught in school and how it could be taught are discussed. Development of understanding is illustrated through children's words and work. (MNS)

Compares the Genevan and Cattell-Horn theories of intelligence and describes both similarities and differences. Describes a study investigating the relation of the Piagetian operative level to the child's ability to use crystallized solution procedures (aids) in making elementary numerical comparisons. (HOD)

Examines the misconceptions of children as indicative of imaginative and perceptive thinking. Anecdotes that illustrate the split between realist and relationalist thinking, and the confusion between fact and metaphor are presented as citations from literary works. (BC)