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Title: The relationship between trauma and psychosis
Author: Dunn, Rebecca
ISNI:       0000 0004 2751 7667
Awarding Body: Lancaster University
Current Institution: Lancaster University
Date of Award: 2011
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It has been suggested that psychosis may emerge as a reaction to trauma and models of anxiety and psychosis suggest that this relationship is mediated and maintained by a number of different psychological variables. Empirical studies have begun to investigate the association between trauma and the symptoms associated with psychosis and the role of other variables, such as post-traumatic beliefs, metacognitive beliefs and dissociation, in linking the two experiences. Therefore, the first section of this thesis aimed to systematically and critically review empirical studies examining the different psychological factors involved in linking trauma to delusions and hallucinations. Differences in the pathways from varying experiences of trauma to varying symptoms of psychosis were also reviewed. The results suggest that higher levels of post-traumatic cognitions were associated with higher levels of delusions and hallucinations and higher levels of dissociation were associated with higher levels of hallucinations. The appraisal of psychotic symptoms was also related to the presence of delusions and hallucinations. The methodological robustness of the research was also discussed in order to identify relevant gaps in the literature. The aim of the second section of the thesis was to investigate whether the relationship between PTSD symptoms and delusional beliefs would be mediated by negative schema about others and negative schema about the self. Ninety-one participants completed online measures and the results suggest that negative schema about others partially mediated the relationship between symptoms of PTSD and delusional beliefs. However, negative schema about the self did not mediate this relationship. The theoretical and clinical implications for both studies are discussed and directions for future research are considered. The final section of the thesis focuses on methodological and professional issues and reflections on these issues in the context of clinical psychology research and practice.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (D.Clin.Psy.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available