Decay of stimulus spatial code in horizontal and vertical Simon tasks

The Journal of General Psychology
Antonino Vallesi, Carlo Umiltà

Abstract

Evidence on the processes underlying the horizontal and vertical Simon effect is still controversial. The present study uses experimental manipulations to selectively delay the stages of response execution, response selection, and stimulus identification in three experiments. A reduction is observed for both horizontal and vertical Simon effects when response execution is delayed by a go-signal presented 400-600 ms post-stimulus onset or when a spatial precue is presented 200-400 ms before the stimulus. When the overlap between stimulus spatial code formation and response selection is prevented by decreasing stimulus discriminability, the horizontal Simon effect decays, but the vertical Simon effect does not change. Activation theories, which propose a decay of the automatically activated response ipsilateral to the stimulus, mainly apply to the horizontal Simon effect. In contrast, translation theories, which propose that the effect occurs when stimulus features are translated into a response code, are more suitable to account for the vertical Simon effect.

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Citations

Jul 8, 2011·Psychological Research·Olga Puccioni, Antonino Vallesi
Feb 18, 2011·Psychonomic Bulletin & Review·Robert W ProctorGiulia Baroni
Jul 9, 2013·Acta Psychologica·Ronald Hübner, Shreyasi Mishra
Dec 31, 2015·Attention, Perception & Psychophysics·Matthew Finkbeiner, Andrew Heathcote
Nov 3, 2011·Experimental Psychology·Giulia BaroniRobert W Proctor
Aug 21, 2016·Consciousness and Cognition·Isabel ArendAvishai Henik
Mar 31, 2010·Journal of Cognitive Neuroscience·Antonino VallesiDonald T Stuss
Apr 9, 2017·Psychological Research·Ruben EllinghausRolf Ulrich
Dec 3, 2020·Scientific Reports·Claudia C SchmidtPeter H Weiss
Dec 4, 2020·Attention, Perception & Psychophysics·Karin M BausenhartJeff Miller

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