Six separate experiments were undertaken to test the hypothesis that poor readers in first, second, and third grade would have more difficulty with simple perceptual discriminations than would good readers in the same grades. Various tasks were used in the experiments, including discrimination of line orientations, checking letters in three-letter…

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…