Extinction-like effects in normals: independence of localization and response selection.
An extinction-like effect in normal subjects was previously elicited when a low-salience target in the left was simultaneously presented with a highly salient distractor in the right visual hemifield, but not vice versa (Pollmann, 1996). We investigated in four experiments whether this extinction-like effect depends on (a) explicit localization and (b) response competition. It was found that the extinction-like effect could be replicated in the absence of both. In contradistinction to our previous results, low-salience distractors had no effect on pop-out target search. This showed that explicit spatial localization demands lead to low-salience distractor interference on pop-out search.
Pollmann
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Max-Planck-Institute of Cognitive Neuroscience, Leipzig, Germany. pollmann@cns.mpg.de
D000328:Adult; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology; D006801:Humans; D008297:Male; D011930:Reaction Time; D014794:Visual Fields / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*