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

Quinn, C, Wilson, H, Cockshaw, W, Barkus, E and Hides, L 2017, 'Development and validation of the cannabis experiences questionnaire - Intoxication effects checklist (CEQ-I) short form', Schizophrenia Research, vol. 189, pp. 91-96.


Document type: Journal Article
Collection: Journal Articles

Title Development and validation of the cannabis experiences questionnaire - Intoxication effects checklist (CEQ-I) short form
Author(s) Quinn, C
Wilson, H
Cockshaw, W
Barkus, E
Hides, L
Year 2017
Journal name Schizophrenia Research
Volume number 189
Start page 91
End page 96
Total pages 6
Publisher Elsevier BV
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.
Subject Health, Clinical and Counselling Psychology
Keyword(s) Cannabis experiences questionnaire
Psychotic like experiences
Psychosis
Cannabis-induced
Substance use
Young people
DOI - identifier 10.1016/j.schres.2017.01.048
Copyright notice © 2017 Elsevier B.V
ISSN 0920-9964
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