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The Adolescent Cannabis Problems Questionnaire (CPQ-A): psychometric properties
Greg Martin1, Jan Copeland, Stuart Gilmour
1National Drug and Alcohol Research Centre, University of New South Wales, Sydney, NSW 2052, Australia. g.martin@unsw.edu.au
Addictive Behaviors
|April 22, 2006
Summary
The Adolescent Cannabis Problems Questionnaire (CPQ-A) reliably measures cannabis-related problems in adolescents. This valid tool aids in assessing issues and treatment outcomes for young cannabis users.
Area of Science:
- Psychology
- Adolescent Health
- Substance Use Research
Background:
- Cannabis use is prevalent among adolescents, yet specific measurement tools for related problems are scarce.
- Existing research lacks psychometrically sound instruments tailored to this demographic.
Purpose of the Study:
- To evaluate the reliability, validity, and factor structure of the Adolescent Cannabis Problems Questionnaire (CPQ-A).
- To establish CPQ-A as a dependable tool for assessing cannabis-related issues in young people.
Main Methods:
- A sample of 100 adolescents (14-18 years) with recent cannabis use completed the CPQ-A twice, one week apart.
- Exploratory factor analysis was employed to determine the measure's underlying structure.
- Reliability was assessed using Cronbach's alpha and test-retest correlation.
Main Results:
- Exploratory factor analysis identified three factors explaining 63% of the variance, with strong internal consistency (alpha coefficients 0.88, 0.72, 0.73).
- The CPQ-A demonstrated excellent test-retest reliability (r=0.91).
- CPQ-A scores significantly correlated with cannabis use frequency and DSM-IV dependence criteria.
Conclusions:
- The Adolescent Cannabis Problems Questionnaire (CPQ-A) is a reliable and valid measure for assessing cannabis-related problems in adolescents.
- CPQ-A shows potential as a clinically useful instrument for both assessment and tracking treatment outcomes in young cannabis users.
