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Comparison of figural intrusion errors in three amnesic subgroups

Published online by Cambridge University Press:  26 February 2009

Jeffrey S. Kixmiller ,
Mieke Verfaellie ,
Kenneth A. Chase  and
Laird S. Cermak
Jeffrey S. Kixmiller
Affiliation:
Memory Disorders Research Center, Boston University School of Medicine, and Department of Veterans Affairs Medical Center, Boston, Massachusetts 02130
Mieke Verfaellie
Affiliation:
Memory Disorders Research Center, Boston University School of Medicine, and Department of Veterans Affairs Medical Center, Boston, Massachusetts 02130
Kenneth A. Chase
Affiliation:
Memory Disorders Research Center, Boston University School of Medicine, and Department of Veterans Affairs Medical Center, Boston, Massachusetts 02130
Laird S. Cermak
Affiliation:
Memory Disorders Research Center, Boston University School of Medicine, and Department of Veterans Affairs Medical Center, Boston, Massachusetts 02130
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Abstract

To examine the contribution of memory deficits and executive dysfunction to the production of prior-item intrusion errors, Korsakoff, mesial temporal amnesic, and anterior communicating artery aneurysm (ACoA) patients’ performance on the Visual Reproduction subtest of the Wechsler Memory Scale-Revised (WMS-R) was assessed. The Korsakoff patients were matched to the mesial temporal group in terms of severity of amnesia, while the ACoA group, which was less severely amnesic, was matched to the Korsakoff group in their performance on executive tests. Results indicated that at immediate recall, Korsakoff patients made significantly more intrusions than mesial temporal and ACoA patients. Conversely, after a delay, ACoA patients tended to make more intrusions than the other groups. Findings suggest that intrusions are due to a combination of deficient memory and executive dysfunction. A further comparison of a subgroup of ACoA patients matched to the Korsakoff patients in terms of severity of amnesia, however, revealed differences in the pattern of intrusions of these two groups, suggesting that different mechanisms may underlie Korsakoff and ACoA patients’ susceptibility to interference. (JINS, 1995, 1, 561–567.)

Keywords

Figural intrusionsProactive interferenceAmnesia
Type
Research Article
Information
Journal of the International Neuropsychological Society , Volume 1 , Issue 6 , November 1995 , pp. 561 - 567
Copyright
Copyright © The International Neuropsychological Society 1995

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