Abstract
In four experiments, we investigated whether a right-left prevalence effect occurs for the Simon task, in which stimulus location is irrelevant, when the stimulus and the response sets vary along horizontal and vertical dimensions simultaneously. Simon effects were evident for both dimensions, and they were of similar magnitude, indicating no prevalence effect. Manipulations of the relative salience of the dimensions for the stimulus and the response sets resulted in a larger Simon effect for the more salient dimension than for the less salient one, but there was no overall prevalence effect. The results indicate that manipulations of salience affect the relative magnitudes of automatic response activation for the vertical and the horizontal dimensions but that the right-left prevalence effect is due to a coding bias in intentional response selection processes when stimulus location is relevant.
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Proctor, R.W., Vu, KP.L. & Nicoletti, R. Does right-left prevalence occur for the Simon effect?. Perception & Psychophysics 65, 1318–1329 (2003). https://doi.org/10.3758/BF03194855
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DOI: https://doi.org/10.3758/BF03194855