Alzheimer patients show a sensitivity decrement over time on a tonic alertness task

Alzheimer patients show a sensitivity decrement over time on a tonic alertness task

Tonic alertness was investigated in Alzheimer patients and normal elderly subjects. Sensitivity and criterion shifts were investigated across 45 min of continuous testing using a high event rate test with very low target probability. Alzheimer patients showed a significant sensitivity decrement over...

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Veröffentlicht in:Journal of clinical and experimental neuropsychology 1994-12, Vol.16 (6), p.851-860
Hauptverfasser: Brazzelli, Miriam, Cocchini, Gianna, Sala, Sergio Della, Spinnler, Hans
Format: Artikel
Sprache:eng
Schlagworte:
Aged
Aged, 80 and over
Alzheimer Disease - psychology
Attention - physiology
Female
Humans
Male
Middle Aged
Neuropsychological Tests
Reaction Time - physiology
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Zusammenfassung:Tonic alertness was investigated in Alzheimer patients and normal elderly subjects. Sensitivity and criterion shifts were investigated across 45 min of continuous testing using a high event rate test with very low target probability. Alzheimer patients showed a significant sensitivity decrement over time that was unrelated to dementia severity. These results suggest that tonic alertness is impaired by Alzheimer's disease even in its early stages.
ISSN:1380-3395
1744-411X
DOI:10.1080/01688639408402698