The Fan-Spread Hypothesis and the Adjustment for Initial Differences between Groups in Uncontrolled Studies
- 1 September 1982
- journal article
- Published by SAGE Publications in Educational and Psychological Measurement
- Vol. 42 (3) , 759-762
- https://doi.org/10.1177/001316448204200305
Abstract
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 non-linear model of growth.Keywords
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