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)

In order to study possible effects of the degree of perceptual illusion, 64 kindergarten children received tests of quantitative identity and quantitative equivalence for the conservations of number and continuous quantity. (SB)

This is a detailed review of studies of extinction of Piagetian concepts, stressing that interpretation of such research is complicated by methodological problems, some avoidable, some intrinsic to the extinction paradigm; and that this paradigm retains the potential for contributing important information about the nature of concrete-operational…

A total of 100 second graders were pretested for conservation of length and weight. Fifty pairs were then formed, each pair consisting of one conserver and one nonconserver. During the second session, the children attempted to resolve their opposed answers on the conservation tasks and on two control questions as well. On both length and weight,…

This study attempted to determine whether children will relinquish their belief in Piagetian concepts upon presentation of disconfirming evidence. Two age groups were tested: third- and fourth-grade and sixth-grade. Conservation of weight and transitivity of weight were the concepts examined; the discrepant feedback consisted of three trials with…