Abstract
A choice reaction time experiment was conducted in which subjects were to respond with one response to either of two stimuli, S1 and S2, and with another response to a third stimulus, S3. The stimuli in the low-compatibility condition were three colors and the responses were letter names. In a high-compatibility condition, S1 and S2 were upper- and lowercases of the same letter and S3 was another letter. The responses were the letter names. The relative frequency of S1 and S2 was manipulated. The results showed a Compatibility by Relative Frequency interaction, with relative frequency affecting reaction time only under low compatibility. It was argued that the stimulus relative frequency affects the response selection stage of information processing.
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Spector, A., Lyons, R.D. The locus of stimulus probability effect in choice reaction time. Bull. Psychon. Soc. 7, 519–521 (1976). https://doi.org/10.3758/BF03337269
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DOI: https://doi.org/10.3758/BF03337269