This study is about helping people with Parkinson's disease, a condition that affects movement, by using a method called autonomy supported learning. Autonomy means letting people make decisions about their own learning process. In this study, participants will learn a finger-pressing task. There are two groups: one group gets to choose when they receive feedback (Self-control group, SC) and the other group receives feedback without choice (Yoked group, YK).

The study aims to see if having control over feedback helps people with Parkinson's learn better, become more motivated, and improve brain activity. Brain activity, or cortical excitability, will be measured using a technique called transcranial magnetic stimulation, which is safe and non-invasive.

• The study lasts for two sessions: the second day and one week later.
• Participants must be over 20 years old and able to follow instructions.
• Those with other neurological disorders or severe tremors cannot participate.