PHENOTYPIC PERFORMANCE PROFILE OF CHILDREN WITH READING DISABILITIES - A REGRESSION-BASED TEST OF THE PHONOLOGICAL-CORE VARIABLE-DIFFERENCE MODEL

In this study, we introduce a new analytic strategy for comparing the cognitive profiles of children developing reading skills at different rates: a regression-based logic that is analogous to the reading-level match design, but one without some of the methodological problems of that design. It provides a unique method for examining whether the reading subskill profiles of poor readers with aptitude/achievement discrepancy differ from those without discrepancy. Children were compared on a varied set of phonological, orthographic, memory, and language processing tasks. The results indicated that cognitive differences between these 2 groups of poor readers all reside outside of the word recognition module. The results generally support the phonological-core variable-difference model of reading disability and demonstrate that degree of aptitude/achievement discrepancy is unrelated to the unique cognitive tradeoffs that are characteristic of the word recognition performance of children with reading disabilities.