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

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)91-96
Number of pages6
JournalSchizophrenia Research
Volume189
Early online date8 Feb 2017
DOIs
Publication statusPublished - Nov 2017
Externally publishedYes

Keywords

  • cannabis experiences questionnaire
  • psychotic like experiences
  • psychosis
  • cannabis-induced
  • substance use
  • young people

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