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Peer reviewedParker, Randall M. – Journal of Learning Disabilities, 1990
The article examines the concepts of power and control in research design and applies them to a review of the validity of three studies (EC 600 064-066) evaluating the effectiveness of using Irlen tinted lenses with reading-disabled persons. Internal validity, external validity, statistical conclusion validity, and construct validity are…
Descriptors: Color, Data Interpretation, Elementary Secondary Education, Evaluation Research
French, Margaret – 1984
The supplantation approach of this study hypothesized that media attributes may serve to bridge the processing link between learner aptitude capacity and the demands of a concept attainment task. Subjects were 492 males aged 16-21, drawn from a College of Technical and Further Education in Melbourne, Australia. All subjects were trade apprentices,…
Descriptors: Academic Aptitude, Aptitude Treatment Interaction, Color, Concept Formation
