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Set-shifting aptitude in Parkinson's disease: external versus internal cues
1Department of Psychology, National Chung-Cheng University, Taiwan, R.O.C.
Psychological Reports
|August 1, 1995
Summary
Patients with Parkinson's disease struggle with internal cues during set-shifting tasks. Their performance on external cues was normal, suggesting limitations in current attentional models for Parkinson's disease research.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurology
Background:
- Parkinson's disease (PD) is a neurodegenerative disorder affecting motor and non-motor functions.
- Set-shifting is a key executive function involving the ability to change cognitive strategies.
Purpose of the Study:
- To investigate set-shifting deficits in Parkinson's disease patients.
- To examine the impact of internal versus external cues on set-shifting performance in PD.
Main Methods:
- A modified odd-man-out test was administered to 12 Parkinson's disease patients.
- Tasks involved alternating between two sorting rules under external and internal cueing conditions.
Main Results:
- Parkinson's disease patients showed significant impairment on tasks requiring internal cues.
- Performance was normal on tasks with external cues.
- Shift costs were higher when shifting to an easier task compared to a more difficult one.
Conclusions:
- Current findings suggest limitations of the Supervisory Attentional System model in explaining PD-related set-shifting deficits.
- Internal cueing deficits may be a specific cognitive feature of Parkinson's disease.
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