Current clinical methods for the assessment of Parkinson's disease suffer from 
inconvenience, infrequency and subjectivity. WiiPD is an approach for the 
objective home based assessment of Parkinson's disease which utilizes the 
intuitive and sensor rich Nintendo Wii Remote. Combined with an electronic 
patient diary, a suite of mini-games, a metric analyzer, and a visualization 
engine, we propose that this system can complement existing clinical practice by 
providing objective metrics gathered frequently over extended periods of time. 
In this paper we detail the approach and introduce a series of metrics deemed 
capable of quantifying the severity of tremor and bradykinesia in those with 
Parkinson's disease. The system has been tested on a 71 year old participant 
with Parkinson's disease over a period of 15 days, a 72 year old control user 
without Parkinson's disease, and a group of 8 young adults. Results indicate a 
clear correlation between patient self rating scores of tremor severity and 
metric values obtained, in addition to clear differences in metrics obtained 
from each user group. These results suggest that this approach is capable of 
indicating the presence and severity of the motor symptoms of Parkinson's 
disease that affect arm motor control.