Spoken vocabulary growth: Its role in the development of phoneme awareness and early reading ability

In this paper, two theoretical positionsregarding the developmental origins of thephoneme as a unit for lexical representationand processing are outlined – theaccessibility and emergent positions. OurLexical Restructuring Model (Metsala & Walley1998), which is consistent with the secondposition, focuses on the role of vocabularygrowth in prompting the implementation of morefine-grained, segmental representations forlexical items in childhood; this restructuringis viewed as an important precursor to theexplicit segmentation or phoneme awarenessskills implicated in early reading success.Empirical evidence that supports this model issummarized, including preliminary results fromone of our most recent studies. Severalsuggestions are made for future research thatwill lead to a better understanding of thedevelopment of spoken word recognition and thelinks between speech- and reading-relatedabilities.     

Contents Volume 16 (2003)

Volume Contents

Contents Volume 16 (2003)     

Phonological,visual and temporal processing in adults with and without reading disability

The primary goal of this study was to comparethree theoretical accounts of readingdisability (RD) by simultaneously studyingphonological, visual, and temporal processingskills. Adults with and without RD werecompared on measures of phonological processingwith the Auditory Analysis Test (AAT) and theWoodcock Reading Mastery Test (WRMT-R) WordAttack subtest. Visual processing was assessedwith the Useful Field of View test (UFOV®)and the Frequency Doubling Technology Perimeter(FDT). The Repetition Test was used toevaluate temporal processing skills. Adultswith RD evidenced poorer phonological andtemporal processing skills than did adultswithout RD, but no significant differencesbetween the groups were found in visualprocessing. Future research is needed toclarify the relations among phonological,visual, and temporal skills and the roles theyplay in RD. The trajectory and co-existence ofdeficits throughout development, as well as howspecifically such impairments affect reading,warrant further investigation.