The influence of cannabis use expectancies on cannabis use and psychotic symptoms in psychosis

Hides, Leanne, Kavanagh, David J., Dawe, Sharon and Young, Ross. McD. (2009) The influence of cannabis use expectancies on cannabis use and psychotic symptoms in psychosis. Drug and Alcohol Review, 28 3: 250-256. doi:10.1080/09595230802130158


Author Hides, Leanne
Kavanagh, David J.
Dawe, Sharon
Young, Ross. McD.
Title The influence of cannabis use expectancies on cannabis use and psychotic symptoms in psychosis
Journal name Drug and Alcohol Review   Check publisher's open access policy
ISSN 1465-3362
Publication date 2009-05-01
Year available 2009
Sub-type Article (original research)
DOI 10.1080/09595230802130158
Open Access Status
Volume 28
Issue 3
Start page 250
End page 256
Total pages 7
Place of publication Richmond, Australia
Publisher Blackwell Publishing Asia
Language eng
Subject C1
110319 Psychiatry (incl. Psychotherapy)
920410 Mental Health
1103 Clinical Sciences
Formatted abstract
Introduction and Aims:

Little is known about motives or expectancies for cannabis use in psychotic populations, despite these cognitive factors being a central focus of the treatment for substance misuse in psychosis. This study examined the relationship between cannabis use expectancies, cannabis use and psychotic symptoms among cannabis using psychotic in-patients. A secondary aim was to determine if there were significant differences in the cannabis use expectancies of psychotic patients with and without Diagnostic and Statistical Manual version IV (DSM-IV) cannabis dependence.

Design and Methods:

Participants consisted of 101 in-patients with psychosis who had used cannabis more than five times in the past year. Expectancies were assessed using the Cannabis Expectancy Questionnaire (CEQ). The frequency of cannabis use, severity of cannabis dependence, presence of DSM-IV cannabis dependence and severity of psychotic symptoms were also assessed using standardised measures.

Results and Conclusions:

Results suggested that cannabis use expectancies were associated with cannabis use but not symptom variables. Expectances for cannabis use predicted recent cannabis use and the presence and severity of cannabis dependence. Psychotic patients with DSM-IV cannabis dependence had significantly higher expectancies for negative effects from cannabis use. Prospective research examining the influence of motives and expectancies for cannabis use on cannabis use and psychotic symptoms is required to obtain a greater understanding of substance use in psychosis and assist with the development of innovative treatment interventions. [Hides L, Kavanagh DJ, Dawe S, Young RMcD. The influence of cannabis use expectancies on cannabis use and psychotic symptoms in psychosis. Drug Alcohol Rev 2008;00:1-7]
Keyword Cannabis
Comorbidity
Expectancies
Motives
Psychosis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Psychology Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
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Created: Thu, 19 Mar 2009, 00:58:24 EST by Sheila Cleary on behalf of Faculty of Social & Behavioural Sciences