This study was concerned with children's ability to conserve spatial relationships among objects in different arrangements, in the presence of projected changes in the observer's visual field. The objectives were: (1) to determine the effects of varying types of arrangement and number of objects in the arrangement on perspective ability…

Nursery school children (N=64) received seven tests of conservation of number which varied in the type and number of perceptual supports for conservation. Most of the tests with these supports facilitated performance in comparison to the standard conservation test. Conservation appeared earlier than usual. There were significant effects of…

Study compares the effects of different conditions which imply reversibility on children's judgments of conservation of quantity. (Authors)

Lower-class children required significantly more training task repetitions to learn a conservation task than did middle-class children. (Authors)

Verbal and pictorial class-inclusion questions were presented to children in kindergarten through grade 6. The data indicates that the purely verbal form of the question was less difficult for the children to answer than the pictorial form. (Author/CS)

An experimental and control group of thirty-two four and five year-old children received identical quantitative tasks except for the language used. Results showed that children's difficulties with simple arithmetic tasks were not purely linguistic. The conclusion supports the suggestion that the development of language is intertwined with…

Analyses revealed consistent support for the hypothesis that number conservation is developmentally prior to liquid quantity conservation. (Authors)

The relation of CA, MA, and IQ to conservation was examined by comparing the performance of bright, normal, and retarded children matched on the critical MA of six years. (Author)

Results indicate that within the limitations of this study there is evidence that children with superior" intelligence showed more mature response patterns on Piaget-type tasks than children of the same age with average" intelligence test scores. (Author)

Five Inhelder-Piaget formal operations tasks were analyzed to determine the extent that the formal operational skills they assess were ordered into a stable hierarchy generalizable across samples of subjects. Subjects were 34 collegiate gymnasts (19 males, 15 females), and 22 students (1 male, 21 females) from a university nursing program.…

This study examined differential performances among groups (categories) of first grade children when solving eight different types of arithmetical word problems under two distinct experimental conditions. The categories of children were actually 4 ability groups: (1) low quantitative comparison scores and low IQ (Lorge-Thorndike IQ Test), (2) low…