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Updated: Jun 8, 2026

Dynamic Digital Biomarkers of Motor and Cognitive Function in Parkinson's Disease
Published on: July 24, 2019
Everyday reasoning abilities in persons with Parkinson's disease
Tiffany L Young1, Antoneta Granic, Tuo Yu Chen
1University of South Florida, School of Aging Studies, Tampa, Florida, USA.
Early Parkinson's disease (PD) patients without dementia show impaired reasoning for instrumental activities of daily living (IADL). This cognitive decline impacts daily tasks like medication management and financial decisions, affecting treatment choices.
Area of Science:
- Neuroscience
- Gerontology
- Cognitive Psychology
Background:
- Parkinson's disease (PD) is characterized by progressive cognitive decline.
- The impact of early-stage PD on instrumental activities of daily living (IADL) in non-demented individuals is not well understood.
Purpose of the Study:
- To assess the reasoning abilities crucial for IADL in non-demented individuals with early Parkinson's disease.
- To compare IADL reasoning skills between PD patients and a healthy control group.
Main Methods:
- Utilized the Everyday Cognitive Battery (ECB) Reasoning subtest.
- Compared 19 non-demented older adults with PD against 20 age-, education-, race-, and gender-matched healthy older adults.
Main Results:
- Individuals with PD scored significantly lower on the ECB Reasoning subtest (M = 61.98) compared to the control group (M = 69.80).
- This suggests early-stage PD affects the capacity to solve everyday reasoning tasks.
Conclusions:
- Non-demented individuals with Parkinson's disease may face challenges with IADL requiring reasoning, such as managing medications, finances, and nutrition.
- These cognitive deficits have significant implications for treatment decision-making capacity in PD patients.
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