Assessing rate control

[From Bruce Abbott (970507.1555 EST)]

Bill Powers (970507.0500 MST) --

I propose that Rick and Bruce (and anyone else who wants to volunteer) put
their heads together and develop a rigorous statistical analysis for both of
these cases. This has been accomplished in part already; what we need is the
rest of the story. It would make a valuable addition to the PCT literature
even if it never gets published anywhere else.

I'll be out of town until Monday (leaving tomorrow morning), but I'll give
it some thought while on the road. One thing to bear in mind is that the
simple analysis I presented looks for a _linear_ relationship; it just so
happens that in the tracking example, cursor position is a linear function
of disturbance and mouse. (I don't think that this presents insuperable
difficulties, however.)

By the way, I now have a great setup at home for doing tracking studies: a
two-axis precision joystick and foot-pedal (currently used with Microsoft
Flight Simulator for flight practice). I plan to revise my current 1-df
tracking programs to use the joystick rather than the mouse. But it might
be fun to develop something that could take advantage of this potential for
multiple-axis control.

Regards,

Bruce

[From Bill Powers (970407.2004 MST)]

Bruce Abbott (970507.1555 EST)--

By the way, I now have a great setup at home for doing tracking studies: a
two-axis precision joystick and foot-pedal (currently used with Microsoft
Flight Simulator for flight practice). I plan to revise my current 1-df
tracking programs to use the joystick rather than the mouse. But it might
be fun to develop something that could take advantage of this potential
for multiple-axis control.

Sounds good -- but write your programs, please, so you can use either the
joystick or the mouse. Different muscle and dimensions of movement are
involved, so it would be interesting to see if the parameters of best-fit
control models differ. Not urgently-needed information, but if it's easy to
get ...

Best,

Bill P.