Subject Attrition in Prevention Research
- 1 January 1997
- journal article
- other
- Published by Taylor & Francis in Substance Use & Misuse
- Vol. 32 (12-13) , 1673-1678
- https://doi.org/10.3109/10826089709035563
Abstract
Experimental evaluations of substance use prevention programs are hampered by high rates of subject attrition. Attrition threatens the internal validity of these studies when attrition is greater in one condition than another. Statistical tests of the effects of attrition are typically lacking. Attrition threatens the external validity of studies because one may not be able to generalize effects of programs to dropouts who are systematically different from those who remain.Keywords
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