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ERIC Number: ED564703
Record Type: Non-Journal
Publication Date: 2013
Pages: 204
Abstractor: As Provided
Reference Count: N/A
ISBN: 978-1-3036-3193-1
Multicomponent Treatment of Rapid Naming, Reading Rate, and Visual Attention in Single and Double Deficit Dyslexics
Johnson, Kary A.
ProQuest LLC, Ed.D. Dissertation, Texas Wesleyan University
While the relationship between rapid automatic naming (RAN) deficiencies and dyslexia (reading disability) is well developed and supported in the behavioral and medical research literature to date, direct treatment of the specific RAN deficiency in addition to subsequently poor reading outcomes in the lexical skill of reading rate and the sublexical process of visual attention (VA), has not been well considered in the design of treatment studies for reading disorders. As such, the purpose of the present experimental treatment study, designed with a delayed treatment control condition, was to ascertain if a targeted multicomponent reading intervention improved outcomes in the sublexical dependent variables of RAN and VA, as well as outcomes in the lexical skill of reading rate. After reviewing descriptive statistics and meeting methodological assumptions, inferential statistics were analyzed using the main analyses, a repeated measures MANCOVA to test the difference between treatment and control outcomes, and a repeated measures MANOVA to test the difference between outcomes for participants with single (RAN only) deficit profiles and those with double (RAN and phonological awareness) deficits. While multivariate results indicated there was not a statistically significant difference between treatment and control groups in terms of all dependent variables, evidence was found to support the dissociation of single and double deficit groups. After each multivariate analysis, univariate outcomes were examined and discriminant analysis (DISCRIM) was implemented to further understand the specific contribution of each dependent variable (RAN, VA, rate) in terms of variance in the independent variables (treatment versus control; single versus double deficit). In terms of differentiating between treatment and control groups, a combined discriminant function of all dependent variables (RAN, VA, rate) accounted for 22.5% of the variance between groups, indicating the multicomponent reading treatment produced beneficial clinical outcomes for participants. In particular, the univariate contribution of VA to overall treatment outcomes was specifically strong (d = 0.43), representing a substantial mean increase in VA scores posttreatment. In terms of differentiating between single and double deficit groups, a combined discriminant function of all dependent variables accounted for 38% of the variance between groups, reconfirming the existence of bivariate pathways to dyslexia in addition to confirming the additional reading impairment manifested in those with double deficits. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page:]
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Publication Type: Dissertations/Theses - Doctoral Dissertations
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A