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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Neural Signatures of the Configural Superiority Effect and Fundamental Emergent Features in Human Vision

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Costa, Thiago Leiros [1, 2] ; Orsten-Hooge, Kimberley [3, 4] ; Rego, Gabriel Gaudencio [1] ; Wagemans, Johan [2] ; Pomerantz, James R. [3] ; Boggio, Paulo Sergio [1]
Total Authors: 6
[1] Univ Prebiteriana Mackenzie, Social & Cognit Neurosci Lab, Sao Paulo - Brazil
[2] Katholieke Univ Leuven, Lab Expt Psychol, Leuven - Belgium
[3] Rice Univ, Dept Psychol, Houston, TX 77251 - USA
[4] UT Dallas, Dept Psychol, Dallas, TX - USA
Total Affiliations: 4
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 8, SEP 17 2018.
Web of Science Citations: 0

The concepts of grouping, emergence, and superadditivity (when a whole is qualitatively different from the sum of its parts) are critical in Gestalt psychology and essential to properly understand the information processing mechanisms underlying visual perception. However, very little is known about the neural processes behind these phenomena (particularly in terms of their generality vs. specificity and their time-course). Here, we used the configural superiority effect as a way to define ``emergence{''} and ``emergent features{''} operationally, employing an approach that can isolate different emergent features and compare them on a common scale. By assessing well-established event related potentials in a HD-EEG system, we found that the critical processes behind configural superiority and superadditive Gestalt phenomena are present in the window between 100 and 200 ms after stimulus onset and that these effects seem to be driven by specific attentional selection mechanisms. Also, some emergent features seem to be differentially processed in different brain hemispheres. These results shed new light on the issues of the generality vs. specificity of the neural correlates of different Gestalt principles, the hemispheric asymmetries in the processing of hierarchical image structure and the role of the N1 ERP component in reflecting feature selective mechanisms. (AU)

FAPESP's process: 14/11668-5 - Evaluating perceptual organization in healthy controls and two clinical populations: basic and translational research
Grantee:Thiago Leiros Costa
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/18713-9 - Neurofeedback and transcranial direct current stimulation in electroencephalographic power spectra during attentional task
Grantee:Gabriel Gaudencio Do Rêgo
Support type: Scholarships in Brazil - Doctorate