A comparison of test results on the Visual Discrimination Test was made between a group of 22 reading disabled children and 22 children who were reading on or above grade level. Both groups were of average or above-average intelligence and the two groups were matched for age and sex. The mean age was 10 years and 3 months and all the reading disabled children were at least one year retarded as measured by the Peabody Individual Achievement Test. The 30-item test was scored for number right and for mean reaction time in seconds. There was no significant difference in reaction time, but the children with normal grade level reading ability had a significantly higher average score, indicating the test's ability to identify reading disability. This test screens visual discrimination ability independently from such variables as motor coordination or eye hand coordination, can be administered in five to ten minutes, and can be objectively scored in less than one minute. (Author/CTM)