The heterogeneity of picture-supported narratives in Alzheimer's disease.
This study describes discourse patterns produced by 46 Alzheimer disease (AD) patients and 53 normal elderly subjects in two picture-supported narratives. Nine measures derived from a cognitive model of discourse processing were obtained and submitted to cluster analysis. Results indicate that discourse patterns elicited from both stimuli were heterogeneous. Further, they fail to clearly differentiate between normal aging and AD in half of the AD patients. Discourse patterns are examined in light of various sources of heterogeneity including severity of cognitive impairment, subject characteristics, and task demands. The usefulness of discourse as a diagnostic and therapeutic tool is discussed.
Duong
Anh
A
Centre de recherche, Institut universitaire de gériatrie de Montréal, Canada. anh@bic.mni.mcgill.ca
Giroux
Francine
F
Tardif
Andréanne
A
Ska
Bernadette
B
D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000175:diagnosis* / Q000523:psychology; D001245:Association Learning; D015331:Cohort Studies; D032882:Comprehension; D005260:Female; D006801:Humans; D007092:Imagination; D008297:Male; D009483:Neuropsychological Tests; D010364:Pattern Recognition, Visual; D011578:Psycholinguistics; D012016:Reference Values; D012660:Semantics; D012691:Serial Learning; D013067:Speech Perception; D014705:Verbal Behavior