Examining the Etiology of Reading Disability as Conceptualized by the Hybrid Model |
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| Authors: | Florina Erbeli Sara A Hart Richard K Wagner Jeanette Taylor |
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| Institution: | 1. Florida Center for Reading Research, Florida State University;2. Department of Psychology and Florida Center for Reading Research, Florida State University;3. Department of Psychology, Florida State University |
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| Abstract: | A fairly recent definition of reading disability (RD) is that in the form of a hybrid model. The model views RD as a latent construct that is manifested through various observable unexpected impairments in reading-related skills and through inadequate response to intervention. The current report evaluated this new conceptualization of RD from an etiological perspective. The sample consisted of 2,737 twin pairs in 1st through 4th grade (Mage = 8.52) from the Florida Twin Project on Reading. Using twin analyses, results showed that a substantial proportion of genetic variance, a small proportion of shared environmental, and a small proportion of nonshared environmental variance was attributed to the RD factor. Findings suggest that the etiological architecture of RD closely mirrors the structure of the hybrid model of RD. |
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