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Evaluating spatiotemporal interactions between...
Journal article

Evaluating spatiotemporal interactions between shapes

Abstract

Spatiotemporal interactions between stimuli can alter the perceived curvature along the outline of a shape (Habak, Wilkinson, Zakher, & Wilson, 2004; Habak, Wilkinson, & Wilson, 2006). To better understand these interactions, we used a forward and backward masking paradigm with radial frequency (RF) contours while measuring RF detection thresholds. In Experiment 1, we presented a mask alongside a target contour and altered the stimulus onset asynchrony between this target-mask pair and a temporal mask. We found that a temporal mask increased thresholds when it preceded the target-mask stimulus by 130-180 ms but decreased thresholds when it followed the target-stimulus mask by 180 ms. Furthermore, Experiment 2 demonstrated that the effects of temporal and spatial masks are approximately additive. We discuss these findings in relation to theories of transient and sustained channels in vision.

Authors

Slugocki M; Duong CQ; Sekuler AB; Bennett PJ

Journal

Journal of Vision, Vol. 19, No. 4, pp. 30–30

Publisher

Association for Research in Vision and Ophthalmology (ARVO)

Publication Date

April 26, 2019

DOI

10.1167/19.4.30

ISSN

1534-7362

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