Children with Reading Disabilities: Does Dynamic Assessment Help in the Classification?

Abstract

This study was conducted to determine whether the cognitive performance of reading disabled and poor readers can be separated under dynamic assessment procedures, and whether measures related to dynamic assessment add unique variance, beyond IQ, in predicting reading achievement scores. The sample consisted of 70 children (39 females and 31 males). Within this sample four groups of children were compared: children with reading disabilities ( n=12), children with math/reading disabilities ( n=19), poor readers ( n=14), and skilled readers ( n=25). Intelligence, reading and math tests, and verbal working memory (WM) measures were administered (presented under static and dynamic testing conditions). Two important findings emerged: (a) hierarchical regression analyses found that a dynamic assessment measure factor score contributed unique variance to predicting reading and mathematics, beyond what is attributed to verbal IQ and initial scores related to WM; and (b) poor readers and skilled readers were more likely to change and maintain their WM score gained under the dynamic testing conditions than children with reading disabilities or children with a combination of math/reading disabilities. Implications for a valid classification of reading disabilities are discussed.

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