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dc.contributor.authorDoughty, O.J.
dc.contributor.authorLawrence, V.A.
dc.contributor.authorAl-Mousawi, A.
dc.contributor.authorAshaye, K.
dc.contributor.authorDone, D.J.
dc.date.accessioned2011-04-21T07:33:55Z
dc.date.available2011-04-21T07:33:55Z
dc.date.issued2009
dc.identifier.citationDoughty , O J , Lawrence , V A , Al-Mousawi , A , Ashaye , K & Done , D J 2009 , ' Overinclusive thought and loosening of associations are not unique to schizophrenia and are produced in Alzheimer's dementia ' , Cognitive Neuropsychiatry , vol. 14 , no. 3 , pp. 149-164 . https://doi.org/10.1080/13546800902857918
dc.identifier.issn1354-6805
dc.identifier.otherPURE: 194589
dc.identifier.otherPURE UUID: f7cd0cfd-bab0-464e-87d2-ab1f97fdeeea
dc.identifier.otherdspace: 2299/5707
dc.identifier.otherScopus: 68849128531
dc.identifier.urihttp://hdl.handle.net/2299/5707
dc.descriptionOriginal article can be found at : http://www.informaworld.com/ Copyright Taylor & Francis [Full text of this article is not available in the UHRA]
dc.description.abstractIntroduction: Bleuler's concept of loosening of associations which he believed epitomised psychotic thinking can manifest as overinclusion (merging of semantic categories) on semantic categorisation tasks. Overinclusion is explained by excessive activation within the semantic memory network to subordinate features with low associative strength. Therefore patients with degradation of subordinate semantic knowledge (e.g., with Alzheimer's Dementia—AD) should not produce overinclusion errors. Methods: 22 people with schizophrenia and 26 people with AD (nonpsychotic, semantic memory impairment) were compared on a semantic categorisation test, the Category Generation Test (CGT). The CGT involves free-sorting 45 cards of pictured objects from five taxonomic groups (e.g., animals). Overinclusion and underinclusion (subdivision of categories) errors were recorded and the strategies used in generating these abnormal categories were explored qualitatively. Results: Two-thirds of both groups generated abnormal categories, including frequent overinclusions. Using a semantic probes test, abnormal categorisations could not be attributed to knowledge degradation as this appeared preserved. Qualitatively, the two groups differed in their sorting strategies. Conclusions: Loosening of associations is found in nonpsychotic people, who have semantic memory impairments (e.g., AD), using semantic knowledge tasks. However there may be different explanations; atypical semantic categorisation in schizophrenia appears to result from attention to thematic rather than feature-based associations.en
dc.language.isoeng
dc.relation.ispartofCognitive Neuropsychiatry
dc.subjectAlzheimer's dementia
dc.subjectcategorisation
dc.subjectloosening of association
dc.subjectoverinclusion
dc.subjectSchizophrenia
dc.subjectsemantic memory
dc.titleOverinclusive thought and loosening of associations are not unique to schizophrenia and are produced in Alzheimer's dementiaen
dc.contributor.institutionDepartment of Psychology
dc.contributor.institutionCentre for Lifespan and Chronic Illness Research
dc.contributor.institutionWeight and Obesity Research Group
dc.description.statusPeer reviewed
rioxxterms.versionofrecordhttps://doi.org/10.1080/13546800902857918
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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