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The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. CONCLUSION AND RECOMMENDATION• The most powerful methodology for evaluating the effectiveness of workplace alcohol and other drug-intervention programs is the randomized field experiment. The implementation of new work site alcohol and other drug-intervention programs or significant changes in existing programs provide propitious occasions for experimental assessment. Recommendation: To enhance scientific knowledge, organizations instituting new work-site alcohol and other drug intervention programs should proceed experimentally if possible. Funding agencies should make field experiments a priority, and should consider providing start-up aid to private companies that are willing to institute programs experimentally and subject them to independent evaluation. REFERENCESDwyer, J.H. 1983 Statistical models. New York: Oxford University. 1993 Estimating Statistical Power in the "Deviation From Secular Trend" Design. NIDA Research Monograph (in press). Rouse J.J., N.J. Kozel, and L. G. Richards, eds. 1985 Self-Report Methods of Estimating Drug Use: Meeting Current Challenges to Validity. NIDA Research Monograph No. 57. Rockville, Md.: National Institute on Drug Abuse.
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