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ERIC Number: EJ923011
Record Type: Journal
Publication Date: 2011
Pages: 12
Abstractor: As Provided
ISSN: ISSN-0022-2194
Examining Agreement and Longitudinal Stability among Traditional and RTI-Based Definitions of Reading Disability Using the Affected-Status Agreement Statistic
Waesche, Jessica S. Brown; Schatschneider, Christopher; Maner, Jon K.; Ahmed, Yusra; Wagner, Richard K.
Journal of Learning Disabilities, v44 n3 p296-307 May-Jun 2011
Rates of agreement among alternative definitions of reading disability and their 1- and 2-year stabilities were examined using a new measure of agreement, the affected-status agreement statistic. Participants were 288,114 first through third grade students. Reading measures were "Dynamic Indicators of Basic Early Literacy Skills" Oral Reading Fluency and Nonsense Word Fluency, and six levels of severity of poor reading were examined (25th, 20th, 15th, 10th, 5th, and 3rd percentile ranks). Four definitions were compared, including traditional unexpected low achievement and three response-to-intervention-based definitions: low achievement, low growth, and dual discrepancy. Rates of agreement were variable but only poor to moderate overall, with poorest agreement between unexpected low achievement and the other definitions. Longitudinal stability was poor, with poorest stability for the low growth definition. Implications for research and practice are discussed. (Contains 4 tables, 1 figure, and 1 note.)
SAGE Publications and Hammill Institute on Disabilities. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: Elementary Education; Grade 1; Grade 2; Grade 3
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Laws, Policies, & Programs: Education for All Handicapped Children Act; Individuals with Disabilities Education Improvement Act 2004
Identifiers - Assessments and Surveys: Dynamic Indicators of Basic Early Literacy Skills (DIBELS); Peabody Picture Vocabulary Test