>On 16 Dec 1997 David Langridge described an ingenious method which he has >devised for calibrating his response to PD medication. His method involves >screwing a 2inch bolt up a long thread- obviously a task requiring some >flexibility and dexterity. (Nice one, David). > >Entirely by co-incidence, I have been considering whether I could come to the problem, BRIAN. Very interesting to know that you have been thinking along the same lines.My nut and bolt test and your finger tapping presumable can only study limited aspects of the disease - for instance although I might obtain a good result from my test which as you say measures flexibility and dexterity - it does not measure the difficulty which I might have in walking. I would be interested to see how others might get on with my test.It's quite fun to do and if any interest is shown I would be happy to provide more precise details of the type of bolt etc.As a scientist manque I am all in favour of objectivity. Good luck with your computer program. David Langridge