On the basis of a conservation of substance experiment with 189 blind and partially sighted children, it is inferred that while the best of them are performing on a par with the best of their sighted peers, the age range in which conservation is attained is more extended for the visually handicapped. (Author)

Hypothesis was confirmed that more familiar and more ambiguous concepts would be less readily named in their less detailed representations. (Author/MB)

The current study is a one-year follow-up of an earlier report that group counseling with institutionalized delinquent females resulted in significant gains in the connotative meanings of several concepts. (Author)

These results support Piaget's position that preoperational children respond to the perceptual lack of equality but not to the lack of conceptual equivalence in class-inclusion problems. (Authors)

Results indicated that information about the effect of brain damage may not support conclusions about children for whom the referral problem was socio-educational-psychological rather than neurological in nature. (Author/MB)

Two major trends in the development of natural language concepts were found in the present study: (1) there was a clear indication that such concepts exist in a relatively fragmented form in young children; (2) young children showed a strong dependence on perceptual attributes in their definitions of concepts. (Author/CB)

The papers and research reports in this monograph form two parts. Part I is intended to help geography educators learn more about how children conceptualize space. The validity of Piaget's views on the evolution of conceptions of territorial size among children of different countries was investigated. Reflecting a different concern for educators…