The Role of Working Memory and Information Processing Speed on Wisconsin Card Sorting Test Performance in Parkinson Disease Without Dementia

Conclusions: Our findings address the relationship between WM and inflexible behavior exhibited by PD without dementia, argue for the importance of lower age, higher education, and level of intelligence for the successful performance on WCST; yet, the differences in cognitive performance regardless of the duration of illness within our patients with PD provide support to cognitive reserve concept. (Source: Journal of Geriatric Psychiatry and Neurology)

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