Memory distortion of depth of a visual stimulus for perception and action

Kanji Tanaka, Kentaro Yamamoto, Chien Sung-En, Katsumi Watanabe

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

Abstract

It has been known remembered locations of visual stimuli are systematically distorted in a two-dimensional (i.e., retinal) coordinate, which includes the foveal bias, memory averaging, and landmark effect. The present study aimed at examining how the remembered depth position of a visual target would be distorted. Also, we examined whether depth distortion would differ for perceptual and motor-related tasks. In the experiments, a visual target was presented for one second at various distances from the observers by using a 3D projector. The fixation distance was also varied. After the disappearance of the target, observers performed either perceptual judgment (the method of constant to estimate the point of psychological subjective equality) or motor response (by using a 3D mouse) for the remembered target distance. The results showed that the remembered depth of the target was compressed toward the averaged depth of the possible depth range for both perceptual and motor responses. In addition, however, the perceptual responses tended to overestimate the depth when the fixation depth was closer than or the same as the nearest possible depth of the target. No bias was observed when the fixation depth was farther than the nearest possible depth. For the motor responses, there was a general underestimation irrespective of fixation depth. These results suggest that spatial memory of depth for visual stimuli may be qualitatively different between perceptual and motor responses.

Original languageEnglish
Title of host publication2016 8th International Conference on Knowledge and Smart Technology, KST 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages281-286
Number of pages6
ISBN (Print)9781467381376
DOIs
Publication statusPublished - 2016 Mar 23
Event8th International Conference on Knowledge and Smart Technology, KST 2016 - Chiangmai, Thailand
Duration: 2016 Feb 32016 Feb 6

Other

Other8th International Conference on Knowledge and Smart Technology, KST 2016
CountryThailand
CityChiangmai
Period16/2/316/2/6

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Keywords

  • Perceptual judgments
  • Pointing movements
  • Spatial localizations
  • Visual spatial memory Introduction

ASJC Scopus subject areas

  • Computer Science Applications
  • Health Informatics
  • Computer Networks and Communications
  • Education
  • Artificial Intelligence

Cite this

Tanaka, K., Yamamoto, K., Sung-En, C., & Watanabe, K. (2016). Memory distortion of depth of a visual stimulus for perception and action. In 2016 8th International Conference on Knowledge and Smart Technology, KST 2016 (pp. 281-286). [7440511] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/KST.2016.7440511