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Test-retest reliability study of the Frostig development test of visual perception. Walter, Helen Irene


The present study was designed to investigate the reliability of the Frostig Developmental Test of Visual Perception with retarded subjects. The Frostig test is divided into five subtests involving visuo-perceptual tasks and measurements. This study computed reliability coefficients on all the subtests as well as on the total scores. The Peabody Picture Vocabulary Test and the Frostig Developmental test of Visual Perception were also correlated in an attempt to assess an aspect of Frostig validity. The sixty retarded subjects used in this study were divided into groups on the basis of both chronological and mental age, and the test-retest method of reliability assessment was used. The results of this study indicate that the total test scores of the Frostig Developmental Test of Visual Perception are reliable when dealing with the perceptual performance of retarded subjects. The stability of the subtest shows greater variation than does that of the total scores. The subtests of Eye-Motor Coordination and Form Constancy yielded the most variable results and it is evident that with the population studied, these subtests cannot be considered stable enough to be individually, diagnostically, useful. The Peabody Picture Vocabulary correlation with the Frostig Developmental Test of Visual Perception of .537 was significant at the .01 level.

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