Abstract
We investigated the effect of the size distribution statistics of background elements on the perceived size of a target. We manipulated the first, second, and third order statistics (i.e., mean, variance, and skewness) of the background element size distribution. We used a two-interval forced-choice paradigm to measure perceived target size at different background size distributions. In each trial, a standard disk, or target, was presented in one interval with a textured background and a comparison disk, on a blank background, in the other. The task for the observers was to determine which interval contained a larger disk. We measured the point of subjective equality for the perceived target size with a staircase procedure. The perceived target size decreased with the increment of mean background disk size. The variance and skewness of the background element size did not affect the perceived target size. Our results showed that only the first order statistics of the background modulated the perceived target size, not the higher order statistics. A computational model, in which the visual system extracts size information by averaging the responses of different size channels, whose response is modulated by the size of the background elements, can account for the results.
Highlights
Texture on Perceived Target SizeReceived: 10 January 2018 Accepted: 28 June 2018 Published: xx xx xxxxChia-Ching Wu1 & Chien-Chung Chen 2We investigated the effect of the size distribution statistics of background elements on the perceived size of a target
Experiment 1 In Experiment 1, we investigated the effect of the first order and second order statistics of the background element size on the apparent target size
When a background texture was presented, the perceived target size decreased with the increment of mean background disk size (Non-additive repeated measure ANOVA F(5,55) = 34.43, p < 0.001)
Summary
We investigated the effect of the size distribution statistics of background elements on the perceived size of a target. Second, and third order statistics (i.e., mean, variance, and skewness) of the background element size distribution. We used a two-interval forced-choice paradigm to measure perceived target size at different background size distributions. We measured the point of subjective equality for the perceived target size with a staircase procedure. The perceived target size decreased with the increment of mean background disk size. The variance and skewness of the background element size did not affect the perceived target size. Our results showed that only the first order statistics of the background modulated the perceived target size, not the higher order statistics. A computational model, in which the visual system extracts size information by averaging the responses of different size channels, whose response is modulated by the size of the background elements, can account for the results
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.