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Lexical and conceptual components of stem completion priming in patients with Alzheimer's disease.
- Source :
-
Neuropsychologia [Neuropsychologia] 1999 Aug; Vol. 37 (9), pp. 1049-59. - Publication Year :
- 1999
-
Abstract
- This study evaluated the hypothesis of dissociation between normal lexical but deficient conceptual repetition priming in patients with Alzheimer's disease (AD). For this purpose, we administered to patients with AD and age-matched normal controls the Stem Completion task. In Experiment 1, the level of word processing during study was manipulated by requiring subjects to count vowels (graphemic condition) or generate meanings (semantic condition) of target words. In Experiment 2, the presentation modality was varied during the study to obtain an intramodal and crossmodal repetition priming. Probably due to a floor effect of performance in the graphemic condition, in Experiment 1, AD patients exhibited lower priming than normal controls for the semantically processed words but comparable priming for the graphemically processed ones. In contrast, in Experiment 2, AD patients were poorly primed both in the intra- and crossmodal conditions. Results question the hypothesis of a lexical/conceptual dissociation in the repetition priming exhibited by AD patients and call for other explicative hypotheses of the dissociation between normal and deficient forms of repetition priming in degenerative dementia.
- Subjects :
- Aged
Analysis of Variance
Association
Case-Control Studies
Cognition Disorders classification
Cognition Disorders physiopathology
Female
Humans
Male
Middle Aged
Practice, Psychological
Semantics
Speech Perception physiology
Alzheimer Disease physiopathology
Concept Formation physiology
Cues
Mental Recall physiology
Reading
Subjects
Details
- Language :
- English
- ISSN :
- 0028-3932
- Volume :
- 37
- Issue :
- 9
- Database :
- MEDLINE
- Journal :
- Neuropsychologia
- Publication Type :
- Academic Journal
- Accession number :
- 10468368
- Full Text :
- https://doi.org/10.1016/s0028-3932(98)00153-5