Electrophysiological Markers of Visual Dimension Changes and Response Changes

Autor/inn/en	Tollner, Thomas; Gramann, Klaus; Muller, Hermann J.; Kiss, Monika; Eimer, Martin
Titel	Electrophysiological Markers of Visual Dimension Changes and Response Changes
Quelle	In: Journal of Experimental Psychology: Human Perception and Performance, 34 (2008) 3, S.531-542 (12 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0096-1523
DOI	10.1037/0096-1523.34.3.531
Schlagwörter	Cognitive Processes; Responses; Brain; Visual Perception; Visual Discrimination; Brain Hemisphere Functions; Experimental Psychology; Visual Stimuli; Reaction Time + Suchen Sie Ihr Suchwort? Cognitive process; Kognitiver Prozess; Gehirn; Visuelle Wahrnehmung; Experimentelle Psychologie; Reaktionsvermögen
Abstract	In cross-dimensional visual search tasks, target discrimination is faster when the previous trial contained a target defined in the same visual dimension as the current trial. The dimension-weighting account (DWA; A. Found & H. J. Muller, 1996) explains this intertrial facilitation by assuming that visual dimensions are weighted at an early perceptual stage of processing. Recently, this view has been challenged by models claiming that intertrial facilitation effects are generated at later stages that follow attentional target selection (K. Mortier, J. Theeuwes, & P. A. Starreveld, 2005). To determine whether intertrial facilitation is generated at a perceptual stage, at the response selection stage, or both, the authors focused on specific event-related brain potential components (directly linkable to perceptual and response-related processing) during a compound search task. Visual dimension repetitions were mirrored by shorter latencies and enhanced amplitudes of the N2-posterior- contralateral, suggesting a facilitated allocation of attentional resources to the target. Response repetitions and changes systematically modulated the lateralized readiness potential amplitude, suggesting a benefit from residual activations of the previous trial biasing the correct response. Overall, the present findings strengthen the DWA by indicating a perceptual origin of dimension change costs in visual search. (Contains 6 figures and 8 footnotes.) (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10