Bottom-up attention capture with distractor and target singletons defined in the same (color) dimension is not a matter of feature uncertainty

Attention, Perception & Psychophysics
Hanna Weichselbaum, Ulrich Ansorge

Abstract

In visual search, attention capture by an irrelevant color-singleton distractor in another feature dimension than the target is dependent on whether or not the distractor changes its feature: Capture is present if the irrelevant color distractor can take on different features across trials, but absent if the distractor takes on only one feature throughout all trials. This influence could be due to down-weighting of the entire color map. Here we tested whether a similar effect could also be brought about by down-weighting of specific color channels within the same maps. We investigated whether a similar dependence of capture on color certainty might hold true if the distractor were defined in the same (color) dimension as the target. At odds with this possibility, in the first and third blocks-in which feature uncertainty was absent-an irrelevant distractor of a certain color captured attention. In addition, in a second block, varying the distractor color created feature uncertainty, but this did not increase capture. Repeating the exact same procedure with the same participants after one week confirmed the stability of the results. The present study showed that a color distractor presented in the same (color) dimension as the t...Continue Reading

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Citations

Sep 2, 2018·Psychological Research·Christian BüselUlrich Ansorge
Sep 29, 2020·Frontiers in Human Neuroscience·Diane BaierUlrich Ansorge

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