Visual confidence on global motion depends on local motion ambiguity and type of motion noise

Man Wai LAM, Alan L. F. LEE

Research output: Other Conference ContributionsPoster

Abstract

Perceptual confidence has been found to correlate with task performance in general, and is believed to be independent of stimulus features. However, certain stimulus feature could induce a subjective sense of uncertainty, which could potentially influence confidence judgments beyond task performance. The present studies aimed at assessing the effects of the ambiguity of local motion signals on perceptual confidence on a global-motion task. Participants first discriminated the global motion directions of two multiple-aperture, global-motion patterns, one generated using multiple Gabor elements and the other
using multiple Plaid elements. They then performed a two-interval, forced-choice confidence task by choosing which of the two perceptual responses they were more confident in being correct. In Experiment 1, when perceptual performance was controlled by varying coherence, we found that participants chose plaids more often than Gabors, even with perceptual performance matched between the two patterns. In Experiment 2, when perceptual performance was controlled by varying luminance contrast of noisy pixels in every motion frame, such “plaid preference” in confidence bias was significantly weakened. Our results show that, at the same level of objective task performance, subject perceptual confidence depends on both the ambiguity of local motion signals and the type of noise.
Original languageEnglish
Publication statusPublished - Aug 2019
EventThe 15th Asia-Pacific Conference on Vision: APCV2019 - Ritsumeikan University (Osaka Ibaraki Campus), Osaka, Japan
Duration: 29 Jul 20191 Aug 2019
http://visionsociety.jp/apcv2019/index.html

Public Lecture

Public LectureThe 15th Asia-Pacific Conference on Vision
CountryJapan
CityOsaka
Period29/07/191/08/19
Internet address

Bibliographical note

Grant: Direct Grant from Lingnan University (DR18A7)

Keywords

  • Motion
  • Psychophysics
  • Motion integration
  • Visual confidence

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    LAM, M. W., & LEE, A. L. F. (2019). Visual confidence on global motion depends on local motion ambiguity and type of motion noise. Poster session presented at The 15th Asia-Pacific Conference on Vision, Osaka, Japan.