The present article describes an evaluation of a self-report questionnaire administered to whole classrooms of 7th graders. Using the test-retest reliability matrix (based on concepts of Cronbach and Campbell and Fiske, eight of nine drug-use indices appeared to have acceptable to good reliability. The three measures included in the test-retest reliability matrix provide stronger evidence for good reliability than could any single measure.
All Science Journal Classification (ASJC) codes
- Medicine (miscellaneous)
- Health(social science)
- Public Health, Environmental and Occupational Health
- Psychiatry and Mental health