Toward a Causal Model Approach for Adjuting for Preexisting Differences in the Nonequivalent Control Group Situation: A General Alternative to ANCOVA.

Magidson, Jay

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ERIC Number: EJ174727

Record Type: Journal

Publication Date: 1977

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Toward a Causal Model Approach for Adjuting for Preexisting Differences in the Nonequivalent Control Group Situation: A General Alternative to ANCOVA

Magidson, Jay

Evaluation Quarterly, 1, 3, 399-420, Aug 77

Path analysis was used to reevaluate the analysis of covariance quasiexperimental study of the effectiveness of the Head Start program. Contrary to the original analysis, the alternative approach yields small positive estimates of effect. (Author/CTM)

Descriptors: Analysis of Covariance, Factor Analysis, Mathematical Models, Path Analysis, Primary Education, Quasiexperimental Design, Statistical Analysis, Statistical Bias, True Scores

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Identifiers - Assessments and Surveys: Illinois Test of Psycholinguistic Abilities; Metropolitan Readiness Tests

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