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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/18920

Title: A Cross-sectional Comparison of Delay Discounting in Smokers & Non-smokers with Schizophrenia and Respective Control Comparisons
Authors: Moss, Taryn Gabrielle
Advisor: George, Tony Peter
Department: Psychology
Keywords: Schizophrenia
Delay Discounting
Issue Date: 15-Feb-2010
Abstract: Background: Schizophrenia is associated with deficits in decision-making. Aim: To determine the effects of smoking status on delay discounting in schizophrenia in comparison to non-psychiatric controls. Method: Cross-sectional comparison of delay discounting across smoking and psychiatric status. Hypotheses: Individuals with schizophrenia were hypothesized to have higher rates of delay discounting than controls; Non-smokers with schizophrenia would have higher rates of delay discounting than smokers. Control smokers would discount future rewards more than non-smokers. Results: No significant differences in delay discounting were observed between psychiatric groups. Smokers with schizophrenia exhibited more delay discounting than non-smokers. Within the psychiatric group, former smokers discount rates were similar to current smokers. Conclusion: Delay discounting deficits in schizophrenia and modulation by cigarette smoking were not supported; our pattern of results in schizophrenia does suggest that deficits in delay discounting in these patients appears to be a trait rather than a state-dependent phenomenon.
URI: http://hdl.handle.net/1807/18920
Appears in Collections:Master
Department of Psychology - Master theses

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