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50 Years of ERIC
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Peer reviewed Peer reviewed
ERIC Number: EJ272077
Record Type: CIJE
Publication Date: 1982
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
The Fan-Spread Hypothesis and the Adjustment for Initial Differences Between Groups in Uncontrolled Studies.
Preece, Peter F. W.
Educational and Psychological Measurement, v42 n3 p759-62 Fall 1982
The validity of various reliability-corrected procedures for adjusting for initial differences between groups in uncontrolled studies is established for subjects exhibiting linear fan-spread growth. The results are then extended to a nonlinear model of growth. (Author)
Descriptors: Achievement Gains, Analysis of Covariance, Error of Measurement, Hypothesis Testing, Mathematical Models, Pretests Posttests, Reliability, Research Design, Research Problems, Scores
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: N/A