Validation of the Cannabis Expectancy Questionnaire (CEQ) in adult cannabis users in treatment

Connor, Jason P., Gullo, Matthew J., Feeney, Gerald F. X. and Young, Ross McD. (2011) Validation of the Cannabis Expectancy Questionnaire (CEQ) in adult cannabis users in treatment. Drug and Alcohol Dependence, 115 3: 167-174. doi:10.1016/j.drugalcdep.2010.10.025

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Author Connor, Jason P.
Gullo, Matthew J.
Feeney, Gerald F. X.
Young, Ross McD.
Title Validation of the Cannabis Expectancy Questionnaire (CEQ) in adult cannabis users in treatment
Journal name Drug and Alcohol Dependence   Check publisher's open access policy
ISSN 0376-8716
1879-0046
Publication date 2011-06
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.drugalcdep.2010.10.025
Volume 115
Issue 3
Start page 167
End page 174
Total pages 8
Editor Eric C. Strain
Place of publication Shannon, Co. Clare, Ireland
Publisher Elsevier Ireland
Collection year 2011
Language eng
Formatted abstract
Background: Outcome expectancies are a key cognitive construct in the etiology, assessment and treatment of Substance Use Disorders. There is a research and clinical need for a cannabis expectancy measure validated in a clinical sample of cannabis users.

Method: The Cannabis Expectancy Questionnaire (CEQ) was subjected to exploratory (n = 501, mean age 27.45, 78% male) and confirmatory (n = 505, mean age 27.69, 78% male) factor analysis in two separate samples of cannabis users attending an outpatient cannabis treatment program. Weekly cannabis consumption was clinically assessed and patients completed the Severity of Dependence Scale-Cannabis (SDS-C) and the General Health Questionnaire (GHQ-28).

Results: Two factors representing Negative Cannabis Expectancies and Positive Cannabis Expectancies were identified. These provided a robust statistical and conceptual fit for the data. Internal reliabilities were high. Negative expectancies were associated with greater dependence severity (as measured by the SDS) and positive expectancies with higher consumption. The interaction of positive and negative expectancies was consistently significantly associated with self-reported functioning across all four GHQ-28 scales (Somatic Concerns, Anxiety, Social Dysfunction and Depression). Specifically, within the context of high positive cannabis expectancy, higher negative expectancy was predictive of more impaired functioning. By contrast, within the context of low positive cannabis expectancy, higher negative expectancy was predictive of better functioning.

Conclusions: The CEQ is the first cannabis expectancy measure to be validated in a sample of cannabis users in treatment. Negative and positive cannabis expectancy domains were uniquely associated with consumption, dependence severity and self-reported mental health functioning.
Crown Copyright © 2010 Published by Elsevier Ireland Ltd. All rights reserved.
Keyword Cannabis
Marijuana
Expectancy
Psychometric
Validation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Corrected Proof available online 16 December 2010.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Medicine Publications
 
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Created: Wed, 30 Mar 2011, 12:07:23 EST by Sheila Cleary on behalf of School of Medicine