Explicit Memory and Repetition Priming in Dementia: Evidence for a Common Basic Mechanism Underlying Conscious and Unconscious Retrieval Deficits

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The present study was designed to assess performance of Alzheimer's (AD) and Multi-infarct (MID) demented patients on the explicit and implicit versions of two memory tasks, namely Word-Stem Completion and Word-Pair Learning. Consistently with previous studies, the AD patients were deficient on the explicit and implicit versions of both tasks. In MID patients, a dissociation emerged between normal implicit and deficient explicit Word-Stem Completion. Two multiple regression analyses were performed to evaluate patients’ ability on measures of lexical-semantic competence, explicit memory, and global intellective efficiency in predicting level of repetition priming. The results demonstrate a close association between explicit and implicit memory performance in AD patients but no relation between repetition priming level and measures of lexical-semantic competence or general intelligence. Overall, the results of the present study do not support previous conceptualizations suggesting that a breakdown in the structure of semantic memory is at the root of deficient priming in demented patients. Alternative interpretations of the deficient repetition priming effect in dementia, based on a common mechanism underlying conscious and unconscious retrieval deficits, are discussed.

Original languageEnglish
Pages (from-to)44-57
Number of pages14
JournalJournal of Clinical and Experimental Neuropsychology
Volume17
Issue number1
DOIs
Publication statusPublished - Feb 1 1995

Fingerprint

Repetition Priming
Dementia
Semantics
Mental Competency
Dissociative Disorders
Aptitude
Intelligence
Unconscious (Psychology)
Regression Analysis
Learning
Efficiency

ASJC Scopus subject areas

  • Clinical Neurology
  • Clinical Psychology
  • Neurology
  • Psychology(all)

Cite this

@article{6a9eabb56eb94426a83871d259471881,
title = "Explicit Memory and Repetition Priming in Dementia: Evidence for a Common Basic Mechanism Underlying Conscious and Unconscious Retrieval Deficits",
abstract = "The present study was designed to assess performance of Alzheimer's (AD) and Multi-infarct (MID) demented patients on the explicit and implicit versions of two memory tasks, namely Word-Stem Completion and Word-Pair Learning. Consistently with previous studies, the AD patients were deficient on the explicit and implicit versions of both tasks. In MID patients, a dissociation emerged between normal implicit and deficient explicit Word-Stem Completion. Two multiple regression analyses were performed to evaluate patients’ ability on measures of lexical-semantic competence, explicit memory, and global intellective efficiency in predicting level of repetition priming. The results demonstrate a close association between explicit and implicit memory performance in AD patients but no relation between repetition priming level and measures of lexical-semantic competence or general intelligence. Overall, the results of the present study do not support previous conceptualizations suggesting that a breakdown in the structure of semantic memory is at the root of deficient priming in demented patients. Alternative interpretations of the deficient repetition priming effect in dementia, based on a common mechanism underlying conscious and unconscious retrieval deficits, are discussed.",
author = "Carlesimo, {G. A.} and L. Fadda and Marfia, {G. A.} and C. Caltagirone",
year = "1995",
month = "2",
day = "1",
doi = "10.1080/13803399508406580",
language = "English",
volume = "17",
pages = "44--57",
journal = "Journal of Clinical and Experimental Neuropsychology",
issn = "1380-3395",
publisher = "Psychology Press Ltd",
number = "1",

}

TY - JOUR

T1 - Explicit Memory and Repetition Priming in Dementia

T2 - Evidence for a Common Basic Mechanism Underlying Conscious and Unconscious Retrieval Deficits

AU - Carlesimo, G. A.

AU - Fadda, L.

AU - Marfia, G. A.

AU - Caltagirone, C.

PY - 1995/2/1

Y1 - 1995/2/1

N2 - The present study was designed to assess performance of Alzheimer's (AD) and Multi-infarct (MID) demented patients on the explicit and implicit versions of two memory tasks, namely Word-Stem Completion and Word-Pair Learning. Consistently with previous studies, the AD patients were deficient on the explicit and implicit versions of both tasks. In MID patients, a dissociation emerged between normal implicit and deficient explicit Word-Stem Completion. Two multiple regression analyses were performed to evaluate patients’ ability on measures of lexical-semantic competence, explicit memory, and global intellective efficiency in predicting level of repetition priming. The results demonstrate a close association between explicit and implicit memory performance in AD patients but no relation between repetition priming level and measures of lexical-semantic competence or general intelligence. Overall, the results of the present study do not support previous conceptualizations suggesting that a breakdown in the structure of semantic memory is at the root of deficient priming in demented patients. Alternative interpretations of the deficient repetition priming effect in dementia, based on a common mechanism underlying conscious and unconscious retrieval deficits, are discussed.

AB - The present study was designed to assess performance of Alzheimer's (AD) and Multi-infarct (MID) demented patients on the explicit and implicit versions of two memory tasks, namely Word-Stem Completion and Word-Pair Learning. Consistently with previous studies, the AD patients were deficient on the explicit and implicit versions of both tasks. In MID patients, a dissociation emerged between normal implicit and deficient explicit Word-Stem Completion. Two multiple regression analyses were performed to evaluate patients’ ability on measures of lexical-semantic competence, explicit memory, and global intellective efficiency in predicting level of repetition priming. The results demonstrate a close association between explicit and implicit memory performance in AD patients but no relation between repetition priming level and measures of lexical-semantic competence or general intelligence. Overall, the results of the present study do not support previous conceptualizations suggesting that a breakdown in the structure of semantic memory is at the root of deficient priming in demented patients. Alternative interpretations of the deficient repetition priming effect in dementia, based on a common mechanism underlying conscious and unconscious retrieval deficits, are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0028905795&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028905795&partnerID=8YFLogxK

U2 - 10.1080/13803399508406580

DO - 10.1080/13803399508406580

M3 - Article

C2 - 7608301

AN - SCOPUS:0028905795

VL - 17

SP - 44

EP - 57

JO - Journal of Clinical and Experimental Neuropsychology

JF - Journal of Clinical and Experimental Neuropsychology

SN - 1380-3395

IS - 1

ER -