A PC parallel port button box provides millisecond response time accuracy under Linux |
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Authors: | Neil Stewart |
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Institution: | (1) Department of Applied Mathematics and Computer Science, Ghent University, Krijgslaan 281 S9, B9000 Ghent, Belgium |
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Abstract: | For psychologists, it is sometimes necessary to measure peoples reaction times to the nearest millisecond. This article describes
how to use the PC parallel port to receive signals from a button box to achieve millisecond response time accuracy. The workings
of the parallel port, the corresponding port addresses, and a simple Linux program for controlling the port are described.
A test of the speed and reliability of button box signal detection is reported. If the reader is moderately familiar with
Linux, this article should provide sufficient instruction for him or her to build and test his or her own parallel port button
box. This article also describes how the parallel port could be used to control an external apparatus |
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Keywords: | |
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