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Context heterogeneity has a sustained impact on attention deployment: behavioral and electrophysiological evidence

Context heterogeneity has a sustained impact on attention deployment: behavioral and electrophysiological evidence
Context heterogeneity has a sustained impact on attention deployment: behavioral and electrophysiological evidence
In visual search, similar nearby stimuli can be grouped and thus enhance processing of an embedded target. The aim of the present study was to examine the time course of attention deployment after a brief presentation of stimulus arrays of different heterogeneity. Targets in less heterogeneous, grouped contexts yielded higher accuracy and larger N2pc amplitudes than targets in more heterogeneous, random contexts, indicating more efficient selection in the former. Subsequently presented probes yielded shorter reaction times and a larger posterior positivity when presented at the target location. This advantage was more pronounced after grouped compared to random contexts at the shorter compared to the longer interstimulus interval. The results show that less heterogeneous contexts that allow for grouping not only enhance processing of stimuli within that context, but have a sustained effect on visual attention.
0048-5772
722-733
Feldmann-Wustefeld, Tobias
ad65a041-3b03-4374-8483-2eb878a6c909
Wykowska, Agnieszka
ccece260-7ade-457a-b8c5-d2db5b2436de
Schubö, Anna
b76528b7-1aba-424c-ba62-242cbc0bfcd9
Feldmann-Wustefeld, Tobias
ad65a041-3b03-4374-8483-2eb878a6c909
Wykowska, Agnieszka
ccece260-7ade-457a-b8c5-d2db5b2436de
Schubö, Anna
b76528b7-1aba-424c-ba62-242cbc0bfcd9

Feldmann-Wustefeld, Tobias, Wykowska, Agnieszka and Schubö, Anna (2013) Context heterogeneity has a sustained impact on attention deployment: behavioral and electrophysiological evidence. Psychophysiology, 50 (8), 722-733. (doi:10.1111/psyp.12061).

Record type: Article

Abstract

In visual search, similar nearby stimuli can be grouped and thus enhance processing of an embedded target. The aim of the present study was to examine the time course of attention deployment after a brief presentation of stimulus arrays of different heterogeneity. Targets in less heterogeneous, grouped contexts yielded higher accuracy and larger N2pc amplitudes than targets in more heterogeneous, random contexts, indicating more efficient selection in the former. Subsequently presented probes yielded shorter reaction times and a larger posterior positivity when presented at the target location. This advantage was more pronounced after grouped compared to random contexts at the shorter compared to the longer interstimulus interval. The results show that less heterogeneous contexts that allow for grouping not only enhance processing of stimuli within that context, but have a sustained effect on visual attention.

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e-pub ahead of print date: 4 June 1800
Published date: August 2013

Identifiers

Local EPrints ID: 424416
URI: https://eprints.soton.ac.uk/id/eprint/424416
ISSN: 0048-5772
PURE UUID: 0173c8f2-9084-42f4-b8d8-8d3bca54e58c

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Date deposited: 05 Oct 2018 11:37
Last modified: 05 Oct 2018 11:37

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Contributors

Author: Agnieszka Wykowska
Author: Anna Schubö

University divisions

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