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Journal of Speech and Hearing Research Vol.39 724-733 August 1996.
© American Speech-Language-Hearing Association
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Effects of Age and Alzheimer's Disease on Recognition of Gated Spoken Words

Nancy B. Marshall 1
Linda W. Duke 2

Amanda C. Walley 2
1 Department of Neurology Alzheimer's Disease Center University of Alabama at Birmingham
2 Department of Psychology University of Alabama at Birmingham

This study investigated the effects of normal aging and Alzheimer's disease on listeners' ability to recognize gated spoken words. Groups of healthy young adults, healthy older adults, and adults with Alzheimer's disease were presented isolated gated spoken words. Theoretical predictions of the Cohort model of spoken word recognition (Marslen-Wilson, 1984) were tested, employing both between-group and within-group comparisons. The findings for the young adults supported the Cohort model's predictions. The findings for the older adult groups revealed different effects for age and disease. These results are interpreted in relation to the theoretical predictions, the findings of previous gating studies, and differentiating age from disease-related changes in spoken word recognition.

KEY WORDS: speech recognition, gating paradigm, Alzheimer's disease, older adults, lexical access

Submitted on January 30, 1995
Accepted on March 13, 1996






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