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Tava, Edward G. – 1971
This research is, in part, a study of a method of differentiating between two different types of retardation (the exogenous or brain injured and the endogenous or non-brain injured). However, this paper is also an example of the evaluation of a research problem, for it incorporates data and information from three different studies, each of which…
Descriptors: Ability Identification, Abstract Reasoning, Diagnostic Tests, Evaluation Methods