Treatment Outcomes for Students with Learning Disabilities: How Important Are Internal and External Validity?.

Simmerman, Susan; Swanson, H. Lee

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Peer reviewed

ERIC Number: EJ626461

Record Type: CIJE

Publication Date: 2001

Pages: N/A

Abstractor: N/A

ISBN: N/A

ISSN: ISSN-0022-2194

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Treatment Outcomes for Students with Learning Disabilities: How Important Are Internal and External Validity?

Simmerman, Susan; Swanson, H. Lee

Journal of Learning Disabilities, v34 n3 p221-36 May-Jun 2001

A review of 913 studies involving students with learning disabilities found treatment outcomes were significantly affected by the following violations: teacher effects, establishing criterion levels of instructional performance, reliance on experimental measures, using different pretest and posttest measures, using a sample heterogeneous in age, and using incorrect units of analysis. (Contains references.) (Author/CR)

Descriptors: Elementary Secondary Education, Influences, Learning Disabilities, Outcomes of Treatment, Performance Factors, Program Effectiveness, Program Evaluation, Research Methodology, Research Problems, Validity

Publication Type: Journal Articles; Reports - Research

Education Level: N/A

Audience: N/A

Language: English

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Authoring Institution: N/A

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Author Affiliations: N/A