The role of haptic versus visual volume cues in the size-weight illusion.
Identifieur interne : 009D07 ( Main/Merge ); précédent : 009D06; suivant : 009D08The role of haptic versus visual volume cues in the size-weight illusion.
Auteurs : R R Ellis [Canada] ; S J LedermanSource :
- Perception & psychophysics [ 0031-5117 ] ; 1993.
English descriptors
- KwdEn :
- MESH :
- psychology : Blindness.
- Adolescent, Adult, Attention, Discrimination Learning, Female, Humans, Male, Optical Illusions, Psychophysics, Size Perception, Stereognosis, Touch, Visual Perception, Weight Perception.
Abstract
Three experiments establish the size-weight illusion as a primarily haptic phenomenon, despite its having been more traditionally considered an example of vision influencing haptic processing. Experiment 1 documents, across a broad range of stimulus weights and volumes, the existence of a purely haptic size-weight illusion, equal in strength to the traditional illusion. Experiment 2 demonstrates that haptic volume cues are both sufficient and necessary for a full-strength illusion. In contrast, visual volume cues are merely sufficient, and produce a relatively weaker effect. Experiment 3 establishes that congenitally blind subjects experience an effect as powerful as that of blindfolded sighted observers, thus demonstrating that visual imagery is also unnecessary for a robust size-weight illusion. The results are discussed in terms of their implications for both sensory and cognitive theories of the size-weight illusion. Applications of this work to a human factors design and to sensor-based systems for robotic manipulation are also briefly considered.
PubMed: 8483695
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