Abstract
Many computer-controlled psychophysical studies allow subjects multiple response alternatives. Encoding the activated response key before signalling the computer makes possible more rapid stimulus/response interaction, simplifies software interrogation of response-key status, and automatically resolves double strikes. We describe an inexpensive unit which uses a priority encoder for up to seven response alternatives.
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Horowitz, P., &Hill, W. (1980).The art of electronics. Cambridge: Cambridge University Press.
Corwin, T. R., Kintz, R. T., &Beaty, W. J. (1979) Computer-aided estimation of psychophysical thresholds by Wetherill tracking.Behavior Research Methods & Instrumentation,11, 526–528.
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This work was supported by NIH Grant EY05348.
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Corwin, T.R., Beaty, W.J. An encoding multiple-key response unit. Behavior Research Methods, Instruments, & Computers 17, 474–475 (1985). https://doi.org/10.3758/BF03214450
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DOI: https://doi.org/10.3758/BF03214450