Abstract
A procedure for producing a null stimulus (S0) in a CRT task is described. The S0 produced is shown to elicit reactions that have characteristics of responses given to stimuli (S1) that appear in regular CRT tasks. It was also discovered that, in this procedure, the initiation of S0 sampling comes earlier than that of S1 when S0 and S1 appear in the same CRT task. The nature of S0 as well as the apparent reasons for its early sampling are discussed.
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This research was supported by the Oklahoma State University Research Foundation and was undertaken while the second author was an NDEA Fellow, Different parts of the data were reported at the 1968 Psychonomic Society meetings in St. Louis and at the 1969 Mid-western Psychologists’ meeting held at Bloomington, Indiana.
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Cowan, T.M., Monroe, B.D. Choice reactions with a null stimulus event. Perception & Psychophysics 7, 267–270 (1970). https://doi.org/10.3758/BF03210162
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DOI: https://doi.org/10.3758/BF03210162