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Peer reviewedMacready, George B.; Dayton, C. Mitchell – Journal of Educational Statistics, 1980
Data evolving from processes which are developmental or hierarchical in nature are often analyzed by using latent class or latent structure models. A procedure for estimating such models when the model is not "identifiable" is presented. (JKS)
Descriptors: Data Analysis, Developmental Psychology, Developmental Tasks, Mathematical Models
Download full textGray, William M.; Hofmann, Richard J. – 1976
A major premise of Piagetian theory relative to the periods of concrete and formal operations is that competence in specific logical operations is a necessary but not sufficient prerequisite to competence in other specific logical operations. The present study tested for the existence of specific concrete operations and specific formal operations…
Descriptors: Cognitive Processes, Data Analysis, Deduction, Developmental Psychology
