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Centre for Policy on Ageing | |
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| Spoken word recognition in individuals with dementia of the Alzheimer's type: changes in talker normalization and lexical discrimination | | Author(s) | Mitchell S Sommers |
| Journal title | Psychology and Aging, vol 13, no 4, December 1998 |
| Pages | pp 631-646 |
| Keywords | Dementia ; Cognitive processes ; United States of America. |
| Annotation | Four experiments were conducted to examine the effects of dementia of the Alzheimer's type (DAT) on talker normalisation and lexical discrimination. Talker normalisation has been proposed as the principal mechanism underlying listeners' ability to maintain perceptual constancy for speech signals. Lexical discrimination refers to the ability to distinguish individual words from phonetically similar items stored in the mental lexicon. Healthy older adults served as controls. Comparisons of controls and very mildly impaired patients with DAT revealed no significant change in either lexical discrimination or talker normalisation. In contrast, individuals with more advanced DAT exhibited significant declines in both abilities. The results are discussed with respect to the possible roles of general slowing and inhibitory declines as factors affecting speech perception in DAT. (AKM). |
| Accession Number | CPA-990218410 A |
| Classmark | EA: DA: 7T |
Data © Centre for Policy on Ageing |
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| ...from the Ageinfo database published by Centre for Policy on Ageing. |
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