button box

[Paul R. Jackson]

We use an in house external button box which has 2 buttons and a mic input.
It plugs into the game/joystick port of the computer. As far as the computer
is concerned it looks like a 3 button joystick. The 2 buttons map to Button1
and Button 2 on the joystick and the mic input maps to Button3. The mic
input is basically a sound level threshold switch where if the mic input
reaches a certain (adjustable) level then the button triggers. The advantage
of using something like this is that it doesn't have the inherent delays
that the mouse and keyboard have. The change is visible to your experiment
almost instantaneously. What is the point of millisecond accurate timing if
your devices are much slower.

Paul
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 Paul R. Jackson
 Experimental Programmer

 School of Psychology
 University of Queensland
 E:paulj at psy.uq.edu.au
 P:3365-6713
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