Reading impairment is more common in males, but the magnitude and origin of this gender difference are debated. In a large-scale study of reading impairment among 491,103 beginning second-graders, gender differences increased with greater severity of reading impairment, peaking at a ratio of 2.4:1 for a broad measure of fluency and a ratio of…

The concept of Matthew effects in reading development refers to a longitudinally widening gap between high achievers and low achievers. Various statistical approaches have been proposed to examine this idea. However, little attention has been paid to psychometric issues of scaling. Specifically, interval-level data are required to compare…

The purpose of this study is to provide a deeper understanding of learning disabled young adults who struggle with low literacy skills in order to learn more about their literacy profiles and, from an emic perspective, understand the affective factors that may have influenced their attendance and persistence in a post-secondary residential…

PPVT and WISC-R scores were compared for students ranging in age from 6 to 16. In descending order, Pearson product correlations ranked best for the total sample, emotionally disabled, regular class, mentally retarded, and learning disabled. The PPCT overestimated ability. (Author)