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Robert G. LaChausse; Esther Lee; Jessica Ducsay – Journal of Drug Education, 2023
Because studies examining youth drug use often have data with a high proportion of zeros, they often do not meet the assumptions for univariate or linear regression analyses that are typically used. We demonstrate the use of zero-inflated negative binomial regression models to address excessive zeros in drug use frequency on perceptions of…
Descriptors: Drug Abuse, Middle School Students, High School Students, Student Attitudes
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McClary, Sybil A.; Lubin, Bernard – Journal of Drug Education, 1985
Manipulated three types of examiners and four types of data in order to study the examiner effect on self-reports of drug use by students (N=152). Analyses revealed that type of examiner, sex, and year in school had a significant three way interaction affecting self-reports of drug use. (Author/BH)
Descriptors: Age Differences, Drug Use, Examiners, Experimenter Characteristics