2008
DOI: 10.1109/toh.2008.4
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Factors Influencing Haptic Perception of Complex Shapes

Abstract: Exploration of an object by arm movement and somatosensation is a serial process that relies on memories and expectations. The present experiments tested the hypothesis that this process involves breaking the object into component shapes (primitives). This was tested by having human subjects explore shapes composed of semicircular arcs, as well as quarter circles or quarter ellipses. The subjects' perception was reported using a visual display. In the first experiment, in which a series of semicircular arcs wa… Show more

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Cited by 7 publications
(6 citation statements)
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“…Furthermore, based on previous investigations, we suggest that the haptic senses of length and orientation are geometrically consistent with each other [6]. However, factors such as a bias toward symmetry [3] and selective attention toward particular features of a complex shape [2], can also introduce distortions in haptically perceived shapes.…”
Section: Discussionsupporting
confidence: 56%
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“…Furthermore, based on previous investigations, we suggest that the haptic senses of length and orientation are geometrically consistent with each other [6]. However, factors such as a bias toward symmetry [3] and selective attention toward particular features of a complex shape [2], can also introduce distortions in haptically perceived shapes.…”
Section: Discussionsupporting
confidence: 56%
“…For complex shapes, it appears that this process involves the synthesis of an overall shape from the geometric properties of simpler components, such as straight edges or elliptical arcs [1], [2], [3], as has also been proposed to occur in visual object recognition [4], [5]. Furthermore, these simpler components would be characterized by a few parameters such as the length and orientation of line segments as well as the eccentricity (or curvature) of arcs.…”
Section: Introductionmentioning
confidence: 99%
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“…It is well known that tasks become easier if they are broken down into components. Testing whether such a breakdown could help subjects to identify unfamiliar objects, Ehrich et al [58] found that the synthesis of haptically sensed shapes is based on simple geometric objects and that this sensing can be strongly influenced by expectations.…”
Section: Discussion Of the Resultsmentioning
confidence: 99%
“…However, when subjects have to judge the shape of complex objects, their percept is biased toward simple geometric shapes and symmetric shapes (Ehrich et al 2008). Also, people are better in haptically aligning rods along the cardinal axes than along axes with an oblique orientation (Hermens and Gielen 2003; Kappers and Koenderink 1999).…”
Section: Discussionmentioning
confidence: 99%