I first came across the non-computer version of this test when I did the apomorphine challenge at my local hospital, where it seemed to accurately measure changes in my hand/arm speed as the drug's dose was increased.

In researching this reply I came across:
http://www.biomedsearch.com/article/...130648130.html

This paper mentions the CAPSIT-PD protocol, which includes a hand/arm movement test over 30cm and 20 sec (cf 15cm and 30 sec for the program).

I expect scores to decrease as a person's PD progresses. However, the diversity of symptoms is such that, in itself, this test is insufficient to measure progression.

John