Electrophysiological correlates of target eccentricity in texture segmentation
Meinecke Berndts C, Schaffer S, Scubö A (2011)
Publication Language: English
Publication Status: Accepted
Publication Type: Journal article, Original article
Publication year: 2011
Journal
Original Authors: Schaffer Susann, Schubö Anna, Meinecke Cristina
Publisher: Elsevier
Book Volume: 80
Pages Range: 198-209
Journal Issue: 3
URI: http://www.perc.phil.uni-erlangen.de/material/SS_IntJournOfPsychophys_2011.pdf
DOI: 10.1016/j.ijpsycho.2011.03.0
Abstract
Event-related potentials and behavioural performance as a function of target eccentricity were measured while subjects performed a texture segmentation task. Fit-of-structures, i.e. easiness of target detection was varied: in Experiment 1, a texture with peripheral fit (easier detection of peripheral presented targets) and in Experiment 2, a texture with foveal fit (easier detection of foveal presented targets) was used. In the two experiments, the N2p was sensitive to target eccentricity showing larger amplitudes for foveal targets compared to peripheral targets, and at the foveal position, a reversal of the N2p differential amplitude effect was found. The anterior P2 seemed sensitive to the easiness of target detection. In both experiments the N2pc varied as a function of eccentricity. However, the P3 was neither sensitive to target eccentricity nor to the fit-of-structures. Results show the existence of a P2/N2 complex (Potts and Tucker, 2001) indicating executive functions located in the anterior cortex and perceptual processes located in the posterior cortex. Furthermore, the N2p might indicate the existence of a foveal vs. peripheral subsystem in visual processing.
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APA:
Meinecke Berndts, C., Schaffer, S., & Scubö, A. (2011). Electrophysiological correlates of target eccentricity in texture segmentation. International Journal of Psychophysiology, 80(3), 198-209. https://dx.doi.org/10.1016/j.ijpsycho.2011.03.0
MLA:
Meinecke Berndts, Cristina, Susann Schaffer, and Anna Scubö. "Electrophysiological correlates of target eccentricity in texture segmentation." International Journal of Psychophysiology 80.3 (2011): 198-209.
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