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ERIC Number: EJ179715
Record Type: Journal
Publication Date: 1977
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Controlling Variables: A Neo-Piagetian Developmental Sequence
Wollman, Warren
Science Education, 61, 3, 385-91, Jul-Sep 77
Defines five levels between concrete and formal operation in the development of the concept of controlling variables. The sample, methodology and research on which the work is based is described in SE 519 500. (CP)
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