Tupelo3,

The app you refer to sounds interesting. Does it provide frquency information, can it run unobtrusively 24/7, can you download the results for further analysis? I understand that you have a background in stats given this could you run a spectral analysis of your data. This will probably show a peak at about 5hz but it may also contain peaks at lower frequencies.

I've written an on-line tremor measurement tool. It works by tracking the movement of the mouse pointer that arises if you put a finger on a laptop's pressure pad or put your hand on the mouse. Unfortunately, it only works with moderate degrees of tremor and doesn't lend itself to 24/7 service.

See:

http://www.parkinsonsmeasurement.org/toolBox/tremor.htm

John