Confabulation behavior and false memories in Korsakoff's syndrome: Role of source memory and executive functioning
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SourcePsychiatry and Clinical Neurosciences, 62, 2, (2008), pp. 220-225
Article / Letter to editor
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Psychiatry and Clinical Neurosciences
SubjectDCN 1: Perception and Action; DCN 2: Functional Neurogenomics; DI-BCB_DCC_Theme 3: Plasticity and Memory; EBP 1: Determinants of Health and Disease; NCEBP 11: Alzheimer Centre; NCEBP 8: Psychological determinants of chronic illness; Neuropsychology and rehabilitation psychology; UMCN 3.2: Cognitive neurosciences; EBP 1: Determinants of Health and Disease; Neuro- en revalidatiepsychologie
AIMS: Confabulation behavior is common in patients with Korsakoff's syndrome. A distinction can be made between spontaneous and provoked confabulations, which may have different underlying cognitive mechanisms. Provoked confabulations may be related to intrusions on memory tests, whereas spontaneous confabulations may be due to executive dysfunction or a source memory deficit. METHODS: In 19 chronic Korsakoff patients, spontaneous confabulations were quantified by third-party rating (Likert scale). Provoked confabulations were assessed using the Dalla Barba Confabulation Battery. Furthermore, assessment of executive function was performed using an extensive neuropsychological battery. False memories (i.e. intrusions) and source memory were measured using twoparallelversions of a word-list learning paradigm (a modification of the Rey Auditory Verbal Learning Test). RESULTS: There were deficits in source memory, in which patients incorrectly assigned previously learned words to an incorrect word list. Also, Korsakoff patients had extensive executive deficits, but no relationship between the severity of these deficits and the severity of confabulation or intrusions on a memory task was found. CONCLUSION: The present findings provide evidence for a dissociation between spontaneous confabulation, provoked confabulation and false memories.
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