Vertical motion triggers bouncing perception in retinotopic and body-centered spaces
- Published
- Accepted
- Subject Areas
- Neuroscience, Psychiatry and Psychology
- Keywords
- stream/bounce perception, motion path, retinotopy, oblique effect
- Copyright
- © 2017 Gobara et al.
- Licence
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ Preprints) and either DOI or URL of the article must be cited.
- Cite this article
- 2017. Vertical motion triggers bouncing perception in retinotopic and body-centered spaces. PeerJ Preprints 5:e3305v1 https://doi.org/10.7287/peerj.preprints.3305v1
Abstract
When two identical objects travel toward each other, overlap completely, and continue on toward opposite ends of a space, observers perceive them as streaming through or bouncing off each other (stream/bounce perception). In this phenomenon, proportion of perceiving bouncing increases as motion path becomes more vertical (Gobara & Yamada, submitted). However, it remains unclear whether this effect is based on the motion path defined by retinotopic or body-centered coordinates. In this study, we investigated this issue by observers tilting their head. In the experiment, the motion path of two black discs were manipulated from horizontal to vertical. Observers tilted their head 30° left or right using a head rest while they viewed display, and were asked to judge whether the two moving objects streamed through or bounced off each other. The results indicated that the peak of a psychometric function fitted to the rate of bouncing perception significantly shifted toward the direction of the head tilt. These results suggest that the effect of verticality of the motion path on stream/bounce perception is based on retinotopic coordinate.
Author Comment
This is a preprint submission to PeerJ Preprints.