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ERIC Number: EJ978597
Record Type: Journal
Publication Date: 2012-Feb
Pages: 24
Abstractor: As Provided
Reference Count: 105
ISSN: ISSN-1076-9242
A Taxometric Investigation of Developmental Dyslexia Subtypes
O'Brien, Beth A.; Wolf, Maryanne; Lovett, Maureen W.
Dyslexia, v18 n1 p16-39 Feb 2012
Long-standing issues with the conceptualization, identification and subtyping of developmental dyslexia persist. This study takes an alternative approach to examine the heterogeneity of developmental dyslexia using taxometric classification techniques. These methods were used with a large sample of 671 children ages 6-8 who were diagnosed with severe reading disorders. Latent characteristics of the sample are assessed in regard to posited subtypes with phonological deficits and naming speed deficits, thus extending prior work by addressing whether these deficits embody separate classes of individuals. Findings support separate taxa of dyslexia with and without phonological deficits. Different latent structure for naming speed deficits was found depending on the definitional criterion used to define dyslexia. Non-phonologically based forms of dyslexia showed particular difficulty with naming speed and reading fluency. (Contains 4 notes, 3 tables and 5 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: Elementary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Gray Oral Reading Test; Woodcock Reading Mastery Test