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Title: The influence of the unusual experiences dimension of schizotypy on timing within a reinforcement schedules and explicit timing judgements context
Author: Randell, Jordan
Awarding Body: Swansea University
Current Institution: Swansea University
Date of Award: 2011
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Schizotypy as a research framework for schizophrenia emphasizes a link between the symptoms of the disorder and schizotypal traits in the non-clinical population, and argues for a symptom orientated approach to the field. One such symptom area concerns that of unusual experiences, such as hallucinations and delusions that occur in both schizophrenia and in the normal population, but differ in intensity and frequency. Hallucinations and delusions are affected by the environment in which they occur, such as a perceptually ambiguous environment. However, given that both hallucinations and delusions are misinterpretations of the current environment, the content of both could also be influenced by previous experiences, where properties of previous experiences interact with the current environment to produce such experiences. One factor that could influence hallucinations and delusions in this way is time. That is, it could be that those individuals more prone to hallucinations and delusions have stronger temporal links with the properties of previous experiences that facilitate hallucinatory and delusional experiences. The current thesis explores the relationship between the influence of environmental properties on hallucinatory reports and the possibility of differences in timing between individuals scoring high or low in schizotypy through tasks that incorporate temporal elements for optimum performance, such as time based schedules of reinforcement, or measure timing more directly, such as temporal bisection tasks. Findings from the thesis show that high schizotypy scorers make more hallucinatory-like reports than low scorers and that those reports are linked to properties of the environment in which they occur. In addition, there is some evidence that high scorers differ in timing across both schedule and temporal bisection tasks, but only under very specific circumstances.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Schizophrenia ; Schizotypal personality disorder