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| Drug Rehabilitation | 1 |
| Evaluation Problems | 1 |
| Experiments | 1 |
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| Evaluation Review | 1 |
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| Dennis, Michael L. | 1 |
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Peer reviewedDennis, Michael L. – Evaluation Review, 1990
Six potential problems with the use of randomized experiments to evaluate programs in the field are addressed. Problems include treatment dilution, treatment contamination or confounding, inaccurate case flow and power estimates, violations of the random assignment processes, changes in the environmental context, and changes in the treatment…
Descriptors: Drug Rehabilitation, Evaluation Problems, Experiments, Field Studies
