In a study of operative thought in children, 104 children, aged 4 to 9, were tested 5 times with the same 25 Piagetian tasks. There were manifest indicators of synergy in the development of the various behaviors, but it was not possible to validate specific problems of behavior organization. (SLD)

Developmental assumptions that are frequently regarded as constraints on elementary school science curricula are analyzed. The argument that elementary school children cannot function as experimentalists because they have not yet attained formal operational thought is not supported by the Piagetian or non-Piagetian research reviewed. (SLD)

To illustrate the joint intervention of sociocognitive conflict and social marking in cognitive processes, 160 children (87 males and 73 females) in Geneva (Switzerland), with an average age of 6.5 years completed conservation of number and conservation of liquids tasks. Conflict and social marking are important in the acquisition of operational…

Psychometric information was obtained on the Longeot test, which measures aspects of formal thinking, from a sample of 884 high school science students in India taking a Hindi version of the test. The test version appears valid for these students and may be used to classify subjects into Piagetian developmental levels. (SLD)

This paper has two purposes: (1) to explain briefly in terms of Piaget's theory why relationships are fundamental for constructivist teachers; and (2) to show how constructivist teachers can think about relationships in classroom activities. In a nutshell, the message is that the process by which children are constructing their intelligence,…

The constructs of concrete and formal operational reasoning were examined in 459 15-year-old secondary school students (234 males and 225 females) in Singapore. Log linear models were used to explore the relationships between Piagetian level of reasoning, the level of intelligence, gender, and type of home-speaking environment among these…