Publication

Attentional Modulation of Visual Spatial Integration: Psychophysical Evidence Supported by Population Coding Modeling

Grillini, A., Renken, R. J. & Cornelissen, F. W., Sep-2019, In : Journal of Cognitive Neuroscience. 31, 9, p. 1329-1342 14 p.

Research output: Contribution to journalArticleAcademicpeer-review

Two prominent strategies that the human visual system uses to reduce incoming information are spatial integration and selective attention. Whereas spatial integration summarizes and combines information over the visual field, selective attention can single it out for scrutiny. The way in which these well-known mechanisms-with rather opposing effects-interact remains largely unknown. To address this, we had observers perform a gaze-contingent search task that nudged them to deploy either spatial or feature-based attention to maximize performance. We found that, depending on the type of attention employed, visual spatial integration strength changed either in a strong and localized or a more modest and global manner compared with a baseline condition. Population code modeling revealed that a single mechanism can account for both observations: Attention acts beyond the neuronal encoding stage to tune the spatial integration weights of neural populations. Our study shows how attention and integration interact to optimize the information flow through the brain.

Original languageEnglish
Pages (from-to)1329-1342
Number of pages14
JournalJournal of Cognitive Neuroscience
Volume31
Issue number9
Early online date16-Apr-2019
Publication statusPublished - Sep-2019

    Keywords

  • RECEPTIVE-FIELD, CONTOUR INTEGRATION, PERFORMANCE, RESOLUTION, RECOGNITION, VARIABILITY, MECHANISMS, MASKING, RETINA, LOAD

View graph of relations

ID: 80397133