Purpose of study was to investigate the applicability of Piaget's theory and methods to the study of conservation in nonhumans. Two out of four subject monkeys achieved stringent and statistically significant performance criteria in sameness-difference judgment tests and showed significant generalization in the fewest possible trials. (Author/SB)

Support for the operation of internal factors in cognitive development was provided by an obtained increase from first to second posttest scores. Two conservations were considered to be involved--conservation of the whole and of the part. (Author)

Investigates the developmental priority of identity conservation as contrasted with equivalence conservation using quantity and number conservation tasks. (Author/AJ)

This study based on a PhD dissertation submitted to Wayne State University, indicates a "conceptual distinction within conventional Pigetian conservation tasks...The results indicate that identity conservation is developmentally prior to equivalence conservation. (Author)

This study examined the effects of judgment-contingent feedback and prior knowledge of 3 rules on the conservation learning of 188 kindergarten children. (Author/JMB)

Non conserving first- and second-grade children were tested on conservation tasks. Eye movements were recorded during the response period for each task. Trained conservers showed more visual exploratory behavior and less perceptual centration than control subjects. (ST)

Investigated whether children will relinquish belief in Piagetian concepts upon presentation of disconfirming evidence. The conservation of weight concept extinguished more readily than transitivity of weight, and only for the latter was a developmental trend evident. (DP)

Studied the development of the concepts of energy conservation and entropy in 5- to 15-year-old children. Energy conservation was not well understood until about age 15. Entropy was understood by 9- to 15-year-olds when the concept was illustrated by the gradual mixing of differently colored, rolling marbles. (Author/DB)

Based on author's PhD dissertation, University of California, Los Angeles (1967).

Conservation in congenitally blind, blindfolded and sighted elementary school students indicated the order of acquisition of various types of conservation was constant. (ST)

Three- to 7-year-old children were trained through reinforcement to select the more or less numerous of two rows of squares. All children successfully judged relative numerosity when number covaried with length or density, but only concrete operational children were successful when numbers did not covary with other dimensions. (Author/DB)

Piaget's conservation paradigm was used to assess five- to seven-year-old children's understanding of the permanence of various kinship roles. Children's conservation was studied by applying certain transformations on single- and multiple-kinship role combinations. Kinship conservation developed gradually in this age range. Females' performance…

Research supported by National Science Foundation grant GE-3 to the University of Minnesota.