title: Planning and task management in Parkinson's disease: differential emphasis in dual-task performance.
abstract: Seventeen patients diagnosed with Parkinson's disease completed a complex computer-based task that involved planning and management while also performing an attention-demanding secondary task. The tasks were performed concurrently, but it was necessary to switch from one to the other. Performance was compared to a group of healthy age-matched control participants and a group of young participants. Parkinson's patients performed better than the age-matched controls on almost all measures and as well as the young controls in many cases. However, the Parkinson's patients achieved this by paying relatively less attention to the secondary task and focusing attention more on the primary task. Thus, Parkinson's patients can apparently improve their performance on some aspects of a multidimensional task by simplifying task demands. This benefit may occur as a consequence of their inflexible exaggerated attention to some aspects of a complex task to the relative neglect of other aspects.
authors.affiliation: Department of Psychology, York University, Toronto, Ontario, Canada. ellenb@yorku.ca
authors.forename: Ellen
authors.initials: E
authors.lastname: Bialystok
authors.forename: Fergus I M
authors.initials: FI
authors.lastname: Craik
authors.forename: Taresa
authors.initials: T
authors.lastname: Stefurak
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000704:Analysis of Variance; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D008606:Mental Processes / Q000502:physiology*; D008875:Middle Aged; D009483:Neuropsychological Tests; D010300:Parkinson Disease / Q000503:physiopathology*; D011340:Problem Solving; D011597:Psychomotor Performance; D011930:Reaction Time; D013647:Task Performance and Analysis; D013997:Time Factors