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Peer reviewedAlban Metcalfe, R. J. – Journal of Experimental Education, 1978
Characteristics of 11 Repgrid indices of cognitive structure, particularly Smith and Leach's hierarchical complexity index, are investigated among boys and girls, aged 9-15. The Smith & Leach index is shown to be significantly reliable; but in common with seven indices of cognitive differentiation, it is of dubious validity. (Author/GDC)
Descriptors: Cognitive Processes, Cognitive Tests, Concept Formation, Difficulty Level
