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Peer reviewedFerretti, Ralph P.; Butterfield, Earl C. – Child Development, 1986
A total of 61 children from first through sixth grades participated in four balance-scale and four inclined-plane problem types in a study testing for invariance of subject classifications as rule-users across problems whose products differed but whose type did not. Results indicated that many children's classifications differed across…
Descriptors: Children, Classification, Knowledge Level, Problem Solving
