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Evaluation Review
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What's this?

Predicting Drug Use at Electronic Music Dance Events: Self-Reports and Biological Measurement

Mark B. Johnson

Pacific Institute for Research and Evaluation, mjohnson{at}pire.org

Robert A. Voas

Pacific Institute for Research and Evaluation

Brenda A. Miller

Prevention Research Center

Harold D. Holder

Prevention Research Center

Most information on the prevalence of drug use comes from self-report surveys. The sensitivity of such information is cause for concern about the accuracy of self-report measures. In this study, self-reported drug use in the last 48 hr is compared to results from biological assays of saliva samples from 371 young adults entering clubs. The relationship between self-reports and drug presence in oral fluid was determined for three substances as follows: cocaine, marijuana, and amphetamine. Forty-one percent of the participants with drugs detected in their oral fluids reported no use in the last 48 hr. The significance of these results is discussed.

Key Words: drug use • self-report • biological assay • validity • electronic music dance event

This version was published on June 1, 2009

Evaluation Review, Vol. 33, No. 3, 211-225 (2009)
DOI: 10.1177/0193841X09333253
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