Abstract
Instruments intended to measure perceptual functioning present a major thrust in the learning disability field for differentiating learning disabled from normal peers. This investigation is an attempt to improve on some of the limitations noted in other research efforts in this area. First, only instruments which are generally accepted as measures of perceptual and perceptual-motor functioning were used. Second, in order to avoid ceiling effects, all subjects were within the age range for which normative data on the selected instruments were available. Third, IQ scores and chronological age were partialled out in order to remove the effects of these variables.