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Schizotypy And Psychosis-Like Experiences From Recreational Cannabis In A Non-Clinical Sample, Emma Barkus, Shon Lewis Jan 2008

Schizotypy And Psychosis-Like Experiences From Recreational Cannabis In A Non-Clinical Sample, Emma Barkus, Shon Lewis

Faculty of Health and Behavioural Sciences - Papers (Archive)

Background. The relationship between cannabis use and psychosis is still a matter for debate. Accounting for the individual differences in subjective experiences to recreational cannabis use in the general population may hold some clues to the aetiological relationship between cannabis and psychotic symptoms. We hypothesized that schizotypy would account for the individual differences in subjective experiences after cannabis use but not in patterns of use. Method. In a sample of 532 young people who had used cannabis at least once, we examined the relationship between the Cannabis Experiences Questionnaire (CEQ) and the Schizotypal Personality Questionnaire (SPQ). Additionally, we examined the …


Cannabis-Induced Psychosis-Like Experiences Are Associated With High Schizotypy, Emma Barkus, John Stirling, Richard Hopkins, Shon Lewis Jan 2006

Cannabis-Induced Psychosis-Like Experiences Are Associated With High Schizotypy, Emma Barkus, John Stirling, Richard Hopkins, Shon Lewis

Faculty of Health and Behavioural Sciences - Papers (Archive)

OBJECTIVE: Recent studies have suggested that cannabis use is a risk factor for developing schizophrenia. We tested the hypothesis that cannabis use increases the likelihood of psychosis-like experiences in non-clinical participants who scored highly on a measure of schizotypy. METHOD: The psychological effects of cannabis were assessed in 137 healthy individuals (76% female, mean age 22 years) using a newly developed questionnaire concerned with subjective experiences of the drug: the Cannabis Experiences Questionnaire. The questionnaire has three subscales: Pleasurable Experiences, Psychosis-Like Experiences and After-Effects. Respondents also completed the brief Schizotypal Personality Questionnaire. RESULTS: Cannabis use was reported by 72% of …


Supportive-Expressive Psychotherapy For Cannabis Dependence, Brin F. Grenyer, Nadia Solowij Jan 2006

Supportive-Expressive Psychotherapy For Cannabis Dependence, Brin F. Grenyer, Nadia Solowij

Faculty of Health and Behavioural Sciences - Papers (Archive)

Supportive–expressive (SE) dynamic psychotherapy forms one variation of a number of psychotherapies that emphasize the importance of effective interpersonal relationships for psychological health (Grenyer, 2002a). The overall goal of SE psychotherapy is to help the client achieve mastery over their difficulties, gain self-understanding, and practice self-control over habitual drug use and related problems. From this framework, cannabis dependence is understood within the context of the client's interpersonal relationships, work, and social problems. The theory behind the SE approach emphasizes the formative influence of life experiences on the development of personality and on the genesis of problems, including habitual cannabis use. …


The Adverse Health And Psychological Consequences Of Cannabis Dependence, Wayne Hall, Nadia Solowij Jan 2006

The Adverse Health And Psychological Consequences Of Cannabis Dependence, Wayne Hall, Nadia Solowij

Faculty of Health and Behavioural Sciences - Papers (Archive)

People who become dependent on cannabis are more likely than infrequent users to experience any of the adverse health effects that are caused by chronic cannabis use. Dependent cannabis use is rare in comparison with the more prevalent pattern of experimental and intermittent use (Bachman et al., 1997), but it may nonetheless affect as many as 1% of adults in the USA and Australia in any 1 year (Anthony et al., 1994; Hall et al., 1999a). Dependent cannabis users typically smoke two or more cannabis cigarettes a day over periods of years or decades in a minority …