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Peer reviewed Peer reviewed
Pike, Ruth; Olson, David R. – Child Development, 1977
Developmental changes in 5- to 7-year-old children's mental representation of addition and subtraction events were examined by means of the response times required to answer more or less questions. (Author/JMB)
Descriptors: Addition, Age Differences, Cognitive Processes, Concept Formation
Peer reviewed Peer reviewed
Siegler, Robert S. – Child Development, 1988
Issues include consistent individual differences in children's strategy choices, interpretation of differences within a framework, and the relation of differences to standardized test performance. (RJC)
Descriptors: Academic Achievement, Addition, Cognitive Processes, Elementary Education