The Relation of Linguistic Awareness Skills to Reading and Spelling for Autistic and Non-Autistic Elementary School-Age Children.

Purpose: For non-autistic children, it is well established that linguistic awareness skills support their success with reading and spelling. Few investigations have examined whether these same linguistic awareness skills play a role in literacy development for autistic elementary school-age children. This study serves as a first step in quantifying the phonological, prosodic, orthographic, and morphological awareness skills of autistic children; how these skills compare to those of non-autistic children; and their relation to literacy performance.

Method: We measured and compared the phonological, prosodic, orthographic, and morphological awareness skills of 18 autistic (with average nonverbal IQs) and 18 non-autistic elementary school-age children, matched in age, nonverbal IQ, and real-word reading. The relations between linguistic awareness and the children's word-level literacy and reading comprehension skills were examined, and we explored whether the magnitude of these relations was different for the two groups. Regression analyses indicated the relative contribution of linguistic awareness variables to performance on the literacy measures for the autistic children.

Results: The non-autistic children outperformed the autistic children on most linguistic awareness measures. There were moderate-to-strong relations between performances on the linguistic awareness and literacy measures for the non-autistic children, and most associations were not reliably different from those for the autistic children. Regression analyses indicate that the performance on specific linguistic awareness variables explains unique variance in autistic children's literacy performance.

Conclusion: Although less developed than those of their non-autistic peers, the linguistic awareness skills of autistic elementary school-age children are important for successful reading and spelling.