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ISSN : 1226-9654

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Vol.19 No.4

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Effects of Contrast and Relative Distance from Fovea of Surrounding Stimulus on Perceptual Completion at the Blind Spot

The Korean Journal of Cognitive and Biological Psychology / The Korean Journal of Cognitive and Biological Psychology, (P)1226-9654; (E)2733-466X
2007, v.19 no.4, pp.329-342
https://doi.org/10.22172/cogbio.2007.19.4.005



& (2007). Effects of Contrast and Relative Distance from Fovea of Surrounding Stimulus on Perceptual Completion at the Blind Spot. The Korean Journal of Cognitive and Biological Psychology, 19(4), 329-342, https://doi.org/10.22172/cogbio.2007.19.4.005

Abstract

Blind spot is the area where optic nerves exit out of the retina. Since there is no photoreceptor in the blind spot, no visual input is present in this portion of the retina. Despite the lack of visual input, we do not realize the presence of the blind spot due to the filling-in mechanism of the human visual system. The visual system fills in the blind spot using surrounding information. We investigated the relationship between characteristics of the surrounding information and the aspect of the filling-in process of the blind spot. We varied stimuli characteristics such as contrast and the relative distance from the fovea. Participants' task was to report the smallest surrounding stimulus which could fill in the blind spot. Surrounding stimuli with higher contrast and relatively closer distance from the fovea filled in the blind spot with relatively smaller size of the stimuli. These results suggest that the signal strength of the surrounding information is an important factor in filling-in of the blind spot.

keywords
blind spot, filling-in process, signal strength of the stimuli, 맹점(blind spot), 채워넣기 과정(filling-in process), 자극 강도

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