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| Age Differences | 1 |
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| Child Development | 2 |
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Peer reviewedWatson, John S.; And Others – Child Development, 1979
Seventy-four lower- and middle-class children aged 2 1/2, 3 1/2, and 4 1/2 years, who were successful at unidimensional sorting of two objects by either color or form, were given feedback for correct bidimensional sorting of three objects, two of which had been used in unidimensional testing. Results indicate that Piagetian centration is a task-…
Descriptors: Age Differences, Classification, Feedback, Lower Class
Peer reviewedSharan, Shlomo; Weller, Leonard – Child Development, 1971
Descriptors: Classification, Cognitive Processes, Ethnic Groups, Grade 1
