Simon congruency effects based on stimulus and response numerosity

The Quarterly Journal of Experimental Psychology : QJEP
J Miller

Abstract

Three choice reaction time experiments documented a Simon-type congruence effect involving the numbers of stimuli and responses. In Experiment 1 the stimulus consisted of one or two high- or low-pitch tones, and participants were required to respond with one or two taps of a response key depending on stimulus pitch. Responses were faster when the number of tones matched the required number of response taps than when these numbers mismatched. Experiment 2 showed that a weaker version of this effect can also be obtained using visual stimuli, and Experiment 3 showed that the analogous effect can even be obtained, albeit very weakly, with bimodal stimuli. There was also evidence that the number of stimuli affected the rate of emitting the two-tap response. These results indicate that stimulus numerosity is processed automatically to the level at which it can affect the selection and possibly the execution of a varying number of responses.

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Citations

Dec 2, 2006·Journal of Motor Behavior·Stephen G Atkins, Jeff O Miller
Nov 2, 2011·Psychological Science·Acer Y-C ChangDenise H Wu

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