Grouping does not require attention

Perception & Psychophysics
Dominique LamyLital Ruderman

Abstract

Many theories of visual perception stipulate that Gestalt grouping occurs preattentively. Subjects' failure to report perceiving even salient grouping patterns under conditions of inattention challenges this assumption (see, e.g., Mack, Tang, Tuma, Kahn, & Rock, 1992), but Moore and Egeth (1997) showed that although subjects are indeed unable to identify grouping patterns outside the focus of attention, effects of these patterns on visual perception can be observed when they are assessed using implicit, rather than explicit, measures. However, this finding, which is the only one to date demonstrating grouping effects without attention, is open to an alternative account. In the present study, we eliminated this confound and replicated Moore and Egeth's findings, using the Müller-Lyer illusion (Experiments 1 and 2). Moreover, we found converging evidence for these findings with a variant of the flanker task (Experiment 3), when the amount of available attentional resources was varied (Experiments 4 and 5). The results reinforce the idea that, although grouping outside the focus of attention cannot be the object of overt report, grouping processes can occur without attention.

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Citations

Jan 10, 2013·PloS One·Tommaso Mastropasqua, Massimo Turatto
Mar 30, 2010·Attention, Perception & Psychophysics·Sarah ShomsteinMarlene Behrmann
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Jul 7, 2017·Attention, Perception & Psychophysics·Einat RashalRuth Kimchi
May 12, 2020·Perception·Tiffany A Carther-KroneJonathan J Marotta
Nov 21, 2018·Attention, Perception & Psychophysics·Katherine Wood, Daniel J Simons

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