Contour interaction In foveal vision: A response to Siderov, Waugh, and Bedell (2013)

摘要

In both peripheral and foveal vision, the ability to recognize a letter may be degraded by nearby contours. In peripheral vision, this contour interaction operates over a large distance, where the targets and flanking contours are well separated, and is often referred to as 'crowding' (see Levi, 2008; Whitney & Levi, 2011 for reviews). In peripheral vision, the extent of contour interaction is more or less independent of target size, and is proportional to E, the target eccentricity (being as much as 0.5E - Bouma, 1970; Pelli, Palomares, & Majaj, 2004; Toet & Levi, 1992). These effects occur with both high and low contrast stimuli in peripheral vision.