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Updated: Aug 23, 2026

Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease
Published on: August 30, 2011
Phonological blocking during picture naming in dementia of the Alzheimer type
Mark E Faust1, David A Balota, Kristi S Multhaup
1Department of Psychology, University of South Alabama, AL, USA. mefaust@uncc.edu
Abstract:
Individuals with dementia of the Alzheimer type (DAT; n = 53, ages 55-91), healthy older adults (n = 75, ages 59-91), and younger adults (n = 24, ages 18-24) performed a word-primed picture-naming task. Word primes were neutral (ready), semantically or phonologically related, or unrelated to the correct picture name. AH groups produced equivalent unrelated-word interference and semantic priming effects in response latencies. However, analysis of errors revealed a DAT-related increase of phonological blocking. The results suggest that picture-naming errors in DAT are due, at least in part, to a breakdown in access to phonological representations of object names as a consequence of reduced inhibitory control over other highly active alternatives.
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