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ERIC Number: ED294888
Record Type: Non-Journal
Publication Date: 1988-Apr
Pages: 24
Abstractor: N/A
ISBN: N/A
ISSN: N/A
How and How Much Do Biases Resulting from Regression to the Mean Affect Outcome Evaluations?
Tallmadge, G. Kasten
The question of regression to the mean is discussed in the contexts of the Title I Evaluation and Reporting System (TIERS) and the Bilingual Education Evaluation System (BEES), both of which involve assessing the achievement growth of project students from pre- to post-test. The correction formula recommended for use with TIERS was designed to eliminate regression between selection and pre-test; for BEES, the idea of a separate selection test was eliminated and an attempt was made to eliminate regression between the selection/pre-test and the post-test and to estimate total group correlation from the actual correlation in the selected sub-group. How much regression there is to correct for and how well alternative correction procedures work are discussed. (SLD)
Publication Type: Speeches/Meeting Papers; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A