Dual target identification and the attentional blink in Parkinson's disease.
In healthy adults, deficits in identifying a second target following a previously attended target in Rapid Serial Visual Presentation (RSVP) occur between intertarget intervals of approximately 100-500 ms. This Attentional Blink (AB) is investigated in nondemented medicated Parkinson's patients using a modification of the standard paradigm that required the identification of two red letters embedded in a black letter distractor stream. Parkinson's patients and controls produced an equivalent AB, although with a different pattern of errors. Thus, the processing and clearance of information was largely preserved in nondemented Parkinson's patients, without evidence of bradyphrenia. However, perseveration of earlier RSVP items in short-term memory was thought to explain the different pattern of errors.
Vardy
Yvette
Y
Department of Psychology, Monash University, Clayton, Victoria, Australia.
Bradshaw
John L
JL
Iansek
Robert
R
D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D001288:Attention; D001767:Blinking / Q000502:physiology*; D016022:Case-Control Studies; D004193:Discrimination Learning; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010300:Parkinson Disease / Q000503:physiopathology*; D010364:Pattern Recognition, Visual; D010775:Photic Stimulation; D011597:Psychomotor Performance; D011930:Reaction Time; D012033:Refractory Period, Psychological; D014796:Visual Perception / Q000502:physiology*