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Houghton, Robert Roy; Tabachnick, Barbara Gerson – Journal of Learning Disabilities, 1979
Changes in magnitude of Muller-Lyer illusion lines between forks and arrows as a function of age were studied in 48 hyperactive and 48 nonhyperactive boys (six-nine years old).
Descriptors: Age Differences, Children, Developmental Stages, Exceptional Child Research

Hammill, Donald D.; Larsen, Stephen C. – Journal of Learning Disabilities, 1974
Descriptors: Auditory Perception, Children, Correlation, Exceptional Child Research