title: Development and validation of the cannabis experiences questionnaire - Intoxication effects checklist (CEQ-I) short form.
abstract: 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.
  
  
  
  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.
  
  
  
  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.
  
  
  
  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.
authors.affiliation: 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.
authors.forename: Catherine A
authors.initials: CA
authors.lastname: Quinn
authors.affiliation: Institute of Health and Biomedical Innovation (IHBI), School of Psychology and Counselling, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Australia.
authors.forename: Hollie
authors.initials: H
authors.lastname: Wilson
authors.affiliation: Institute of Health and Biomedical Innovation (IHBI), School of Psychology and Counselling, Faculty of Health, Queensland University of Technology (QUT), Brisbane, Australia.
authors.forename: Wendell
authors.initials: W
authors.lastname: Cockshaw
authors.affiliation: School of Psychology, University of Wollongong, Wollongong, Australia.
authors.forename: Emma
authors.initials: E
authors.lastname: Barkus
authors.affiliation: 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.
authors.forename: Leanne
authors.initials: L
authors.lastname: Hides
mesh_terms: D000293:Adolescent; D002186:Cannabinoids / Q000633:toxicity*; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D002189:Marijuana Abuse / Q000175:diagnosis* / Q000209:etiology* / Q000523:psychology; D008385:Marijuana Smoking / Q000009:adverse effects*; D011618:Psychotic Disorders / Q000209:etiology; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D055815:Young Adult
chemical_list: D002186:Cannabinoids
keywords: Cannabis experiences questionnaire; Cannabis-induced; Psychosis; Psychotic like experiences; Substance use; Young people