Development and validation of the cannabis experiences questionnaire - Intoxication effects checklist (CEQ-I) short form

Catherine A Quinn; Hollie Wilson; Wendell Cockshaw; Emma Barkus; Leanne Hides

doi:10.1016/j.schres.2017.01.048

Development and validation of the cannabis experiences questionnaire - Intoxication effects checklist (CEQ-I) short form

Schizophr Res. 2017 Nov:189:91-96. doi: 10.1016/j.schres.2017.01.048. Epub 2017 Feb 8.

Authors

Catherine A Quinn¹, Hollie Wilson², Wendell Cockshaw², Emma Barkus³, Leanne Hides⁴

Affiliations

¹ Centre for Youth Substance Abuse Research (CYSAR), Australia; Centre for Children's Health Research (CCHR), Australia; Institute of Health and Biomedical Innovation (IHBI), School of Psychology and Counselling, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Australia. Electronic address: c6.quinn@qut.edu.au.
² Institute of Health and Biomedical Innovation (IHBI), School of Psychology and Counselling, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Australia.
³ School of Psychology, University of Wollongong, Wollongong, Australia.
⁴ Centre for Youth Substance Abuse Research (CYSAR), Australia; Centre for Children's Health Research (CCHR), Australia; Institute of Health and Biomedical Innovation (IHBI), School of Psychology and Counselling, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Australia.

PMID: 28189531
DOI: 10.1016/j.schres.2017.01.048

Abstract

Objective: To develop and validate a short form of the Cannabis Experiences Questionnaire - Intoxication Effects (CEQ-I), a 42-item scale which measures the euphoric and paranoid-dysphoric effects of cannabis intoxication.

Method: Exploratory and confirmatory factor analyses were conducted among 604 past-month cannabis users to develop the short form. The factor structure was replicated in a second sample of 146 past-month cannabis users. The concurrent validity of the scale was also examined.

Results: Consistent with previous research, two factors were identified (paranoid-dysphoric; euphoric), and were replicated with confirmatory factor analyses. The most parsimonious scale consisted of 13 items. Correlations of short-form subscales with corresponding original subscales were high. The paranoid-dysphoric subscale was also moderately positively correlated with measures of psychotic-like experiences (PLEs) and psychological distress.

Conclusions: The revised and validated CEQ-I short form can be used to explore the euphoric and paranoid-dysphoric effects of cannabis intoxication in young cannabis users, and whether these experiences increase their risk of developing cannabis use and psychotic disorders. The CEQ-I short form has the potential to aid in the identification of young cannabis users at risk of the paranoid-dysphoric effects of cannabis intoxication and may assist in the development of early intervention strategies targeting cannabis users with PLEs.

Keywords: Cannabis experiences questionnaire; Cannabis-induced; Psychosis; Psychotic like experiences; Substance use; Young people.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adolescent
Cannabinoids / toxicity*
Factor Analysis, Statistical
Female
Humans
Male
Marijuana Abuse / diagnosis*
Marijuana Abuse / etiology*
Marijuana Abuse / psychology
Marijuana Smoking / adverse effects*
Psychotic Disorders / etiology
Reproducibility of Results
Surveys and Questionnaires*
Young Adult

Substances

Cannabinoids