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Tracking the apparent location of targets in interpolated motion
S Shioiri1, P Cavanagh, T Miyamoto
1Department of Information and Image Sciences, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, Japan. shiori@image.tp.chiba-u.ac.jp
Vision Research
|May 2, 2000
Summary
Perception of smooth motion can occur even when a target moves in discrete steps. Judgments of this interpolated motion closely match real motion, suggesting accurate visual processing of movement paths.
Area of Science:
- Visual Perception
- Motion Perception
- Psychophysics
Background:
- Discrete movements can be perceived as continuous.
- Understanding interpolated motion is key to visual processing.
Purpose of the Study:
- Investigate the nature of interpolated motion in attentive tracking and apparent motion.
- Compare perceived motion accuracy between real and interpolated paths.
Main Methods:
- Used attentive tracking and apparent motion displays.
- Employed an alignment procedure to analyze location judgments.
- Assessed critical stimulus onset asynchrony (SOA) for motion perception.
Main Results:
- Apparent target location moved smoothly between discrete points.
- Judgments of interpolated motion were comparable to continuous motion.
- Accurate location judgments required a critical SOA of approximately 500 ms.
Conclusions:
- Visual system creates an accurate model of interpolated motion paths.
- Motion analysis integrates velocity information over a long time constant (approx. 200 ms).
- Perceived motion is robust to discrete steps under specific conditions.