Authors: Stevens, Elizabeth A., Christy Austin, Clint Moore, Nancy Scammacca, Alexis N. Boucher, and Sharon Vaughn.
Publication: Exceptional Children (Sage Journals). First Published February 22, 2021 | DOI: 10.1177/0014402921993406
Over the past decade, parent advocacy groups led a grassroots movement resulting in most states adopting dyslexia-specific legislation, with many states mandating the use of the Orton-Gillingham approach to reading instruction. Orton-Gillingham is a direct, explicit, multisensory, structured, sequential, diagnostic, and prescriptive approach to reading for students with or at risk for word-level reading disabilities (WLRD). Evidence from a prior synthesis and What Works Clearinghouse reports yielded findings lacking support for the effectiveness of Orton-Gillingham interventions. We conducted a meta-analysis to examine the effects of Orton-Gillingham reading interventions on the reading outcomes of students with or at risk for WLRD. Findings suggested Orton-Gillingham reading interventions do not statistically significantly improve foundational skill outcomes (i.e., phonological awareness, phonics, fluency, spelling; effect size [ES] = 0.32; p = .24), although the mean ES was positive in favor of Orton-Gillingham-based approaches. Similarly, there were not significant differences for vocabulary and comprehension outcomes (ES = 0.14; p = .57) for students with or at risk for WLRD. More high-quality, rigorous research with larger samples of students with WLRD is needed to fully understand the effects of Orton-Gillingham interventions on the reading outcomes for this population.
Stevens, E. A., Austin, C., Moore, C., Scammacca, N., Boucher, A. N., & Vaughn, S. (2021). Current State of the Evidence: Examining the Effects of Orton-Gillingham Reading Interventions for Students With or at Risk for Word-Level Reading Disabilities. Exceptional Children. https://doi.org/10.1177/0014402921993406
Excerpts from Full Text (Summarizing Findings):
Is there Scientific Evidence to Support OG Instruction for Students with WLRD?