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The Validity of Perceptual Deficit Explanations of Reading Disability: A Reply to Fletcher and Satz.
Peer reviewedVellutino, Frank R. – Journal of Learning Disabilities, 1979
In the article the author refutes J. Fletcher and P. Satz's analysis of the etiology of reading disability on logical, theoretical, and empirical grounds. (Author/PHR)
Descriptors: Etiology, Exceptional Child Research, Hypothesis Testing, Learning Disabilities
Peer reviewedFletcher, Jack M.; Satz, Paul – Journal of Learning Disabilities, 1979
In the rejoinder the authors describe the methodological and interpretive factors in the Vellutino et al, experiments which limited the degree to which the studies refuted perceptual deficit hypotheses of reading disability. Note: for more of the interchange see EC 114 687-688. (Author/PHR)
Descriptors: Etiology, Exceptional Child Research, Hypothesis Testing, Learning Disabilities
Peer reviewedGross, Karen; Rothenberg, Stephen – Journal of Learning Disabilities, 1979
Two methodological problems often arising in dyslexia research are considered. The first problem concerns the validity of experimental measures and the related problem of interpreting null results. The second problem involves the effects of sampling from a disabled population if the disorder under investigation has multiple unknown origins.…
Descriptors: Cognitive Processes, Dyslexia, Hypothesis Testing, Learning Disabilities
