Minimal Clinically Important Difference of the Box and Block Test in Parkinson

This study is measuring hand and arm function in people with Parkinson's disease using the Box and Block Test (a simple task where you move blocks from one compartment to another). Researchers want to establish the minimum meaningful improvement on this test for Parkinson's patients. **You may be eligible if...** - You have Parkinson's disease at a mild to moderate stage (Hoehn & Yahr 1–3) - You are currently in the medication 'on' phase (when your medication is working well) - You have not had physiotherapy recently **You may NOT be eligible if...** - You have significant cognitive decline (mini-mental score below 24) - You have severe, uncontrolled movement problems (dyskinesia) - You have had brain surgery for Parkinson's - You have unstable heart or breathing problems - You have an arm or hand problem unrelated to Parkinson's Talk to your doctor to see if this trial is right for you.