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Articles 1 - 10 of 10
Full-Text Articles in Arts and Humanities
Dissociation Mediates The Relationship Between Childhood Trauma And Hallucination-Proneness., F Varese, E Barkus, R P. Bentall
Dissociation Mediates The Relationship Between Childhood Trauma And Hallucination-Proneness., F Varese, E Barkus, R P. Bentall
Emma Barkus
BACKGROUND: It has been proposed that the relationship between childhood trauma and hallucinations can be explained by dissociative processes. The present study examined whether the effect of childhood trauma on hallucination-proneness is mediated by dissociative tendencies. In addition, the influence of dissociative symptoms on a cognitive process believed to underlie hallucinatory experiences (i.e. reality discrimination; the capacity to discriminate between internal and external cognitive events) was also investigated.MethodPatients with schizophrenia spectrum disorders (n=45) and healthy controls (with no history of hallucinations; n=20) completed questionnaire measures of hallucination-proneness, dissociative tendencies and childhood trauma, as well as performing an auditory signal detection …
Hallucination Proneness, Schizotypy And Meta-Cognition, John Stirling, Emma Barkus, Shon Lewis
Hallucination Proneness, Schizotypy And Meta-Cognition, John Stirling, Emma Barkus, Shon Lewis
Emma Barkus
Disordered or maladaptive meta-cognitive processing appears to be a prominent feature for some individuals with a diagnosis of schizophrenia. We sought to establish whether healthy individuals distinguished either in terms hallucination proneness (HP) or level of schizotypy could also be differentiated on the sub-scales of the Meta-cognitions Questionnaire (MCQ), or a modified version of it in which items about worry were replaced with items specifically related to thinking. A total of 106 healthy volunteers completed the Oxford and Liverpool Inventory of Feelings and Experiences and Launay-Slade hallucination scale, the Schizotypal Personality Questionnaire and two versions of the MCQ: the original …
Ecstasy (Mdma) And Its Relationship With Self Report Depression, Anxiety And Schizotypy, Lisa Woods, Emma Barkus
Ecstasy (Mdma) And Its Relationship With Self Report Depression, Anxiety And Schizotypy, Lisa Woods, Emma Barkus
Emma Barkus
Abstract. Aims: The relationship between ecstasy and affective psychological symptoms are still subject to debate. We aimed to examine the relationship between Ecstasy use and self-report depression, anxiety and schizotypy. Design: Data were collected via structured remote self-report questionnaires. Participants: Participants were split into three groups: a control group with no ecstasy use, a light ecstasy user group (<50 >times), and a heavy ecstasy user group (>50 times). Measurements: Amount and patterns of ecstasy use were recorded, the Beck Depression Inventory (BDI), and Beck Anxiety Inventory (BAI) measured depression and anxiety respectively, and schizotypal traits were measured using the …
Understanding And Using Advanced Statistics, Jeremy Foster, Emma Barkus, Christian Yavorsky
Understanding And Using Advanced Statistics, Jeremy Foster, Emma Barkus, Christian Yavorsky
Emma Barkus
The spread of sophisticated computer packages and the machinery on which to run them has meant that procedures which were previously only available to experienced researchers with access to expensive machines and research students can now be carried out in a few seconds by almost every undergraduate. Understanding and Using Advanced Statistics provides the basis for gaining an understanding of what these analytic procedures do, when they should be used, and what the results provided signify. This comprehensive textbook guides students and researchers through the transition from simple statistics to more complex procedures with accessible language and illustration.
Cannabis-Induced Psychosis-Like Experiences Are Associated With High Schizotypy, Emma Barkus, John Stirling, Richard Hopkins, Shon Lewis
Cannabis-Induced Psychosis-Like Experiences Are Associated With High Schizotypy, Emma Barkus, John Stirling, Richard Hopkins, Shon Lewis
Emma Barkus
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 …
Cannabis-Induced Psychotic-Like Experiences Are Predicted By High Schizotypy. Confirmation Of Preliminary Results In A Large Cohort., John Stirling, Emma Barkus, L Nabosi, S Irshad, G Roemer, B Schreudergoidheijt, Shon Lewis
Cannabis-Induced Psychotic-Like Experiences Are Predicted By High Schizotypy. Confirmation Of Preliminary Results In A Large Cohort., John Stirling, Emma Barkus, L Nabosi, S Irshad, G Roemer, B Schreudergoidheijt, Shon Lewis
Emma Barkus
Background: Cannabis use has been identified as a possible risk factor for developing schizophrenia. In a previous paper we reported preliminary evidence that cannabis use increases the likelihood of psychosis-like experiences in non-clinical respondents who scored highly on a measure of schizotypy. We now present findings from pooled data from 3 new follow-up studies comprising a sample of 477 respondents, of whom 332 reported using cannabis at least once. Sampling and Methods: As in our previous study, the psychological effects of cannabis were assessed with the Cannabis Experiences Questionnaire, from which 3 subscales can be derived; encompassing pleasurable experiences, psychosis-like …
Suggestibility, Dissociation And Positive Schizotypy, Emma Barkus, John Stirling, John Cavill
Suggestibility, Dissociation And Positive Schizotypy, Emma Barkus, John Stirling, John Cavill
Emma Barkus
Abstract. 94 participants, drawn from a parent sample of 1206 individuals who had previously taken part in an assessment of the factor structure of the Oxford-Liverpool Inventory of Feelings and Experiences (O-LIFE), were designated into groups differentiated in terms of low, moderate or high levels of positive schizotypy. All also completed the dissociative experiences scale (DES) and the Inventory of Suggestibility (IS). Our findings suggest that higher reported levels of dissociative experiences and higher suggestibility both independently predict higher scores of positive schizotypy, although suggestibility appears to be a stronger predictor than dissociation.
Schizotypy And Psychosis-Like Experiences From Recreational Cannabis In A Non-Clinical Sample, Emma Barkus, Shon Lewis
Schizotypy And Psychosis-Like Experiences From Recreational Cannabis In A Non-Clinical Sample, Emma Barkus, Shon Lewis
Emma Barkus
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 …
Distress And Metacognition In Psychosis Prone Individuals: Comparing High Schizotypes To The At-Risk Mental State, Emma Barkus, John Stirling, Paul French, Anthony Morrison, Richard Bentall, Shon Lewis
Distress And Metacognition In Psychosis Prone Individuals: Comparing High Schizotypes To The At-Risk Mental State, Emma Barkus, John Stirling, Paul French, Anthony Morrison, Richard Bentall, Shon Lewis
Emma Barkus
Both schizotypy and at-risk mental states (ARMS: prodromal states) define individuals at risk for psychotic symptoms. However, the relationship between the 2 is unclear. ARMS individuals are, by definition, help-seeking and therefore at greater risk. We tested whether high schizotypes and ARMS exist along the same continuum by examining maladaptive metacognitions and distress. About 95 healthy volunteers (39% male; mean age, 22.8 years) completed the Schizotypal Personality Questionnaire, the Launay-Slade Hallucinations Scale, Metacognitions Questionnaire (MCQ), and the General Health Questionnaire, and 58 help seeking individuals with ARMS status (41% male; mean age, 22.2 years) completed the Metacognitions Questionnaire and General …
Personality And Cannabis Use, Emma Barkus
Personality And Cannabis Use, Emma Barkus
Emma Barkus
Cannabis is one of the most widely used illegal substances in the world. Its use has been reported to be over-represented in many psychiatric conditions and has frequently been found to predate the onset of psychiatric symptoms. However, cannabis may also have detrimental effects on the general population. Factors that predict the onset of use are receiving increased attention to aid in identifying groups of young people who may be more prone to consume cannabis. Personality traits may be one such factor as they are readily identifiable and offer information that can be used for improved targeting of educational material …