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Source monitoring and memory confidence in schizophrenia

Moritz, S.; Woodward, T.S.; Ruff, C.C.; (2003) Source monitoring and memory confidence in schizophrenia. Psychological Medicine , 33 (1) pp.131 - 139. 10.1017/S0033291702006852. Green open access

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Abstract

BACKGROUND: The present study attempted to extend previous research on source monitoring deficits in schizophrenia. We hypothesized that patients would show a bias to attribute self-generated words to an external source. Furthermore, it was expected that schizophrenic patients would be overconfident regarding false memory attributions. METHOD: Thirty schizophrenic and 21 healthy participants were instructed to provide a semantic association for 20 words. Subsequently, a list was read containing experimenter- and self-generated words as well as new words. The subject was required to identify each item as old/new, name the source. and state the degree of confidence for the source attribution. RESULTS: Schizophrenic patients displayed a significantly increased number of source attribution errors and were significantly more confident than controls that a false source attribution response was true. The latter bias was ameliorated by higher doses of neuroleptics. CONCLUSIONS: It is inferred that a core cognitive deficit underlying schizophrenia is a failure to distinguish false from true mnestic contents.

Type: Article
Title: Source monitoring and memory confidence in schizophrenia
Open access status: An open access version is available from UCL Discovery
DOI: 10.1017/S0033291702006852
Publisher version: http://dx.doi.org/doi:10.1017/S0033291702006852
Language: English
Additional information: © 2003 Cambridge University Press
UCL classification: UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
URI: https://discovery.ucl.ac.uk/id/eprint/3769
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