Word-stem completion priming for perceptually and conceptually encoded words in patients with Alzheimer's disease

This study examined whether the frequently reported word-stem completion priming deficit of Alzheimer's disease (AD) patients could be characterized as either a semantic encoding deficit or a conceptual priming deficit. AD patients and normal elderly control subjects studied words in two condit...

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Bibliographic Details
Published in:Neuropsychologia 1997, Vol.35 (1), p.25-35
Main Authors: Fleischman, Debra A, Gabrieli, John D.E, Rinaldi, Julie A, Reminger, Sheryl L, Grinnell, Eliza R, Lange, Kelly L, Shapiro, Rita
Format: Article
Language:English
Subjects:
Aged
Alzheimer Disease - psychology
Alzheimer's disease
Biological and medical sciences
Cognition - physiology
conceptual encoding
Cues
Geriatrics
Humans
implicit memory
item priming
Medical sciences
Memory - physiology
Memory, Short-Term - physiology
Mental Recall - physiology
Perception - physiology
perceptual encoding
priming
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Verbal Learning
word-stem completion
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Summary:This study examined whether the frequently reported word-stem completion priming deficit of Alzheimer's disease (AD) patients could be characterized as either a semantic encoding deficit or a conceptual priming deficit. AD patients and normal elderly control subjects studied words in two conditions: (1) reading visually presented words aloud, which maximizes perceptual encoding of seen words, and (2) generating words aloud from definitions, which maximizes conceptual encoding of words not seen but retrieved on the basis of semantic context. Recognition accuracy was greater for words that were generated at study, and word-stem completion priming was greater for words that were read at study. For the AD patients, recognition accuracy was impaired and word-stem completion priming was intact for words encoded in both conditions. The findings are discussed in terms of discrepant results about word-stem completion priming in AD.
ISSN:0028-3932
1873-3514
DOI:10.1016/S0028-3932(96)00057-7