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Visual and haptic cues in processing occlusion
Hiroshige Takeichi1,2, Keito Taniguchi3, Hiroaki Shigemasu3
1Computational Engineering Applications Unit, Head Office for Information Systems and Cybersecurity (ISC), RIKEN, Wako, Saitama, Japan.
Frontiers in Psychology
|March 27, 2023
Summary
Visual cues, not haptic ones, are key for processing visual occlusion, even though both enhance depth perception confidence. This suggests vision dominates occlusion processing due to natural constraints.
Area of Science:
- Cognitive Science
- Neuroscience
- Human-Computer Interaction
Background:
- Depth discontinuity aids in resolving segmentation ambiguities during occlusion processing.
- Both visual and haptic cues can provide information about depth.
Purpose of the Study:
- To investigate the distinct contributions of visual and haptic cues to depth discontinuity perception in occlusion scenarios.
- To determine how visual and haptic information influence object recognition when occlusion is present.
Main Methods:
- A virtual reality experiment using a head-mounted display with 15 participants.
- Word recognition task where stimuli were occluded by a virtual ribbon at varying depths.
- Manipulated visual cues (binocular stereopsis vs. monocular) and haptic cues (absent, consecutive, concurrent).
Main Results:
- Word recognition performance improved with stereoscopic visual cues but not with haptic cues.
- Both visual and haptic cues increased confidence in depth estimation.
- Performance was better when the occluding object was farther away, creating a hollow effect.
Conclusions:
- Visual input is primarily responsible for processing occlusion, overriding haptic input.
- Despite haptic system's spatial perception capabilities, vision dominates occlusion resolution.
- Natural constraints likely dictate the dominance of visual information in occlusion processing.
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