Perceived duration of coherent and separate motions K Yamamoto1, K Miura2 |
|---|
1The University of Tokyo, Japan |
| Recent studies have shown that visual motion affects time perception. The duration of fast moving stimuli seems longer than slow moving stimuli (Kaneko & Murakami, 2009), and the duration of receding stimuli seems longer than approaching stimuli (Ono & Kitazawa, 2010). In this study, we examined whether motion coherence also affects time perception. We used a stimulus of McDermott et al. (2001), in which a diamond outline moves in a circular trajectory while its corners are hidden by visible or invisible occluders. Although only the movements of four line segments can be seen, observers generally perceive the single coherent motion of a diamond outline when the occluders are visible, whereas they perceive the separate motions of line segments when the occluders are invisible. With these stimuli, we compared the perceived duration between coherent and separate motions. By using a duration discrimination paradigm, we showed that the duration of the coherent motion seemed longer than the separate motions when the physical duration was 1,000 ms, not 1,600 ms. Moreover, we showed that perceived duration was not different in each duration condition when corresponding stimuli did not move. These results suggest the possibility that motion coherence also affects time perception. |
| Up Home |
|---|