Journal article
Haptic form perception: Relative salience of local and global features
Perception & psychophysics, Vol.61(5), pp.895-908
01/1999
Handle:
https://hdl.handle.net/2376/117339
PMID: 10499002
Abstract
John B. Pierce Laboratory and Yale University, New Haven, Connecticut When we examine objects haptically, do we weight their local and global features as we do visually, or do we place relatively greater emphasis on local shape? In Experiment 1, subjects made either haptic or visual comparisons of pairs of geometric objects (from a set of 16) differing in local and global shape. Relative to other objects, those with comparable global shape but different local features were judged less similar by touch than by vision. Separate groups of subjects explored the same objects while wearing either thick gloves (to discourage contour-following) or splinted gloves (to prevent enclosure). Ratings of similarity were comparable in these two conditions, suggesting that neither exploratory procedure was necessary, by itself, for the extraction of either local or global shape. In Experiment 2, haptic exploration time was restricted to 1, 4, 8, or 16 sec. Limiting exploration time affected relative similarity in objects differing in their local but not their global shape. Together, the findings indicate that the haptic system initially weights local features more heavily than global ones, that this differential weighting decreases over time, and that neither contour-following nor enclosure is exclusively associated with the differential emphasis on local versus global features.
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Details
- Title
- Haptic form perception: Relative salience of local and global features
- Creators
- Stephen Lakatos - John B. Pierce Laboratory and Yale University New Haven ConnecticutLawrence Marks - John B. Pierce Laboratory and Yale University New Haven Connecticut
- Publication Details
- Perception & psychophysics, Vol.61(5), pp.895-908
- Academic Unit
- Psychology, Department of
- Publisher
- Springer-Verlag; New York
- Identifiers
- 99900548309801842
- Language
- English
- Resource Type
- Journal article