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Download full textRoberts, Jean – 1973
A validation study of the vision test battery used in the Health Examination Survey of 1966-1970 was conducted among 210 youths 12-17 years-old who had been part of the larger survey. The study was designed to discover the degree of correspondence between survey test results and clinical examination by an opthalmologist in determining the…
Descriptors: Adolescents, Exceptional Child Research, Incidence, Partial Vision
Cook, Ann C. N.; Hannaford, Alonzo E. – 1972
The investigation was undertaken to obtain data on the number of kindergarten, second, and seventh grade Ss classified as having color vision defects by the American Optical-Hardy, Rand, Rittler Test (AO-HRR) and two tests by S. Ishihara. Also studied was the ability of color vision defective and color normal Ss to utilize color as measured by the…
Descriptors: Classification, Color, Elementary School Students, Exceptional Child Education
