An empirical test of alternative claims by Bryant and Piaget concerning the development of invariance of quantities in 3- and 4-year-old children was made. Results support the Piagetian thesis in showing that those subjects respond with stereotypic strategies rather than by an invariance of number principle. (Author/JMB)

Tests Piaget's assertion that the anticipation of conservation among otherwise nonconserving children is a pseudoconservation since it is limited to those lacking knowledge of covariation. Number, area, and length conservation tasks and a covariation task were given to 96 children from kindergarten through the fifth grade. (Author/SS)

Two hypotheses concerning children's treatment of "less" as a synonym of "more" were tested with 4- and 5-year-olds. It was hypothesized: (1) that the "less"-"more" distinction can be taught; and (2) that conservation is dependent on the capacity to distinguish "more" and "less". (Author/CS)

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)

The possible effect of experimenter expectancy in number conservation task experiments was explored. (JMB)

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)

Preschool and kindergarten nonconservers (N=114) were examined for their use of dimensions relevant to quantity in two conservation-of-substance tasks. The results were interpreted as being counter to Piaget's 4-step equilibration model of the development of compensation and conservation. (ST)

Questions concerning the effects of familiar and alien materials, age and culture, and the etiology of conservation are examined in number and continous quantity tasks assessing conservation in Yoruba children from traditional and educationally advantaged homes. (Author/AJ)

This study investigated the influence of knowledge of conservation on recall of an event by 4- to 7-year-old children. Changes in recall over time were found to follow an inconsistent pattern and seemed to be unrelated to changes in the subject's stage of development. (Author/JMB)

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

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…

Event-related potentials (ERPs) of five- to seven-year-old girls were measured while the girls performed a visual selective attention task and a Piagetian conservation task. Results suggested more anterior ERP sources for nonconservers than conservers during early stimulus analysis, and more lateralized ERP sources for conservers than…

Second grade children were pretested for the ability to conserve, after which conservers were paired with nonconservers. Pairs were then instructed to resolve their opposing answers on the conservation tasks. (JMB)

Presents two studies which investigated the importance of subtle contexture factors on the young child's performance on cognitive problems--specifically, conservation. (ST)