Abstract
The present study confirmed that there is no overall right—left prevalence effect for Simon tasks, in which stimulus location is irrelevant, when (1) the stimulus and response sets vary along both horizontal and vertical dimensions simultaneously, (2) the stimulus set varies along both dimensions, but the response set varies along only one dimension, and (3) the stimuli and responses vary in one of four possible locations and responses are made by a unimanual joystick movement. In all experiments, Simon effects of similar magnitude were evident for both the horizontal and the vertical dimensions. The findings suggest that the right—left prevalence effect observed with two-dimensional location-relevant tasks is not due to stronger overall automatic activation of horizontal codes but to different translation efficiencies in intentional response selection processes.
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Vu, KP.L., Pellicano, A. & Proctor, R.W. No overall right-left prevalence for horizontal. Perception & Psychophysics 67, 929–938 (2005). https://doi.org/10.3758/BF03193544
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DOI: https://doi.org/10.3758/BF03193544