PET Flasher: A machine language subroutine for timing visual displays and response latencies |
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| Authors: | Philip M Merikle Jim Cheesman John Bray |
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| Institution: | 1. Department of Psychology, University of Waterloo, N2L 3G1, Waterloo, Ontario, Canada
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| Abstract: | PET Flasher presents a one-line stimulus display at any location on a PET/CBM (Commodore Business Machines) screen and measures reaction time from display onset. Display duration is accurately controlled in 16.7-msec steps, and reaction time measurement is accurate within ±1 msec. PET Flasher is easily incorporated within any PET/CBM BASIC program, since as a subroutine, it is called only when precise timing operations are required. |
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