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Conrad, Kendon J., Ed. – New Directions for Program Evaluation, 1994
The 9 articles of this theme issue stem from a project on alcohol and drug abuse that involved 14 projects, 10 of which began with randomized clinical trials. These papers describe implementation problems associated with experimentation in field research and the focus on ensuring internal validity. (SLD)
Descriptors: Alcohol Abuse, Drug Abuse, Evaluation Methods, Experiments