@article{01f61075af674db08dd44fc33ba378d7,
title = "Separate first- and second-order processing is supported by spatial summation estimates at the fovea and eccentrically",
abstract = "We estimated spatial summation areas for the detection of luminance-modulated (LM) and contrast-modulated (CM) blobs at the fovea, 2.5, 5 and 10 deg eccentrically. Gaussian profiles were added or multiplied to binary white noise to create LM and CM blob stimuli and these were used to psychophysically estimate detection thresholds and spatial summation areas. The results reveal significantly larger summation areas for detecting CM than LM blobs across eccentricity. These differences are comparable to receptive field size estimates made in V1 and V2. They support the notion that separate spatial processing occurs for the detection of LM and CM stimuli.",
keywords = "Contrast, Luminance, Peripheral vision, Second-order vision, Spatial scaling, Spatial summation",
author = "Subash Sukumar and Waugh, {Sarah J.}",
note = "Funding Information: We thank Dr. Laura Doherty for programming support and helpful comments in carrying out this work. We acknowledge helpful suggestions made by two anonymous reviewers. Portions of the results of this work were presented in abstract form at the 2003 Vision Sciences Society Meeting and the 2004 Applied Vision Association Meeting. This work was supported by an Anglia Ruskin University Research Scholarship to S.S. and the Anglia Ruskin University Research Capacity Fund to S.J.W. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",
year = "2007",
month = mar,
day = "1",
doi = "10.1016/j.visres.2006.10.004",
language = "English",
volume = "47",
pages = "581--596",
journal = "Vision Research",
issn = "0042-6989",
publisher = "Elsevier Limited",
number = "5",
}