Rates of agreement among alternative definitions of reading disability and their 1- and 2-year stabilities were examined using a new measure of agreement, the affected-status agreement statistic. Participants were 288,114 first through third grade students. Reading measures were "Dynamic Indicators of Basic Early Literacy Skills" Oral…

Data from the Connecticut Longitudinal Study were used to compare two definitions of reading disability: a discrepancy-based model and a low reading achievement model. Children (n=415) satisfying each definition in second grade were compared retrospectively in kindergarten and prospectively in fifth guide. Findings suggest more similarities than…

To examine the validity of distinguishing children with reading disabilities according to discrepancy and low-achievement definitions, 4 assessments of expected achievement and 2 of actual achievement were obtained for 199 elementary school students. Results do not support the validity of the discrepancy versus the low-achievement definition.…

The legitimacy of using the criterion of low reading achievement in the study of learning and memory skills with learning disabled children was assessed, based on a comparison of 35 nondisabled students, 15 low readers, and 10 learning disabled high school students. Learning disabilities were defined as encompassing perceptual and/or processing…