Size-numerosity interaction depends retinal rather than perceived size

Saki Takao, Katsumi Watanabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Walsh [1] has put forward an interesting theory 'A Theory of Magnitude' (AToM), which propounds shared visual processes for various quantity perceptions such as time, space and number. Supporting the AToM, the number of dots surrounded by smaller circles are perceived to be more numerous than dots surrounded by larger circles [2]. To examine the processing level of this size-numerosity interaction, we used the flash-lag effect, where a flashed stimulus appears to lag gradually changing stimuli, and dissociated physical from perceived size of surrounding stimuli. In the experiments, dots appeared at various timings relative to shrinking or expanding circles. In Experiment 1, participants judged the size of the surrounding circles at the time when the dots appeared. The dots perceptually lagged the changing circles about 250 ms (flash-lag effect). In Experiment 2, participants reported the number of dots. The perceived-lag between dots and surrounding circles did not affect the numerosity perception of the dots. These results suggest that the modulation of numerosity perception depends on the retinal rather than perceived size of surrounding circles and the interaction between size and numerosity perception involves visual processes earlier than perceptual registration of size of modulating stimuli.

Original languageEnglish
Title of host publicationKST 2020 - 2020 12th International Conference on Knowledge and Smart Technology
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages199-202
Number of pages4
ISBN (Electronic)9781728144665
DOIs
Publication statusPublished - 2020 Jan
Event12th International Conference on Knowledge and Smart Technology, KST 2020 - Pattaya, Chonburi, Thailand
Duration: 2020 Jan 292020 Feb 1

Publication series

NameKST 2020 - 2020 12th International Conference on Knowledge and Smart Technology

Conference

Conference12th International Conference on Knowledge and Smart Technology, KST 2020
CountryThailand
CityPattaya, Chonburi
Period20/1/2920/2/1

Keywords

  • Component
  • Contextual modulation
  • Ebbinghaus illusion
  • Flash-lag effect
  • Numerosity perception
  • Visual perception

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Science Applications
  • Computer Vision and Pattern Recognition
  • Decision Sciences (miscellaneous)
  • Information Systems and Management

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  • Cite this

    Takao, S., & Watanabe, K. (2020). Size-numerosity interaction depends retinal rather than perceived size. In KST 2020 - 2020 12th International Conference on Knowledge and Smart Technology (pp. 199-202). [9059306] (KST 2020 - 2020 12th International Conference on Knowledge and Smart Technology). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/KST48564.2020.9059306