Delay improves performance on a haptic spatial matching task

Zuidhoek, Sander; Kappers, Astrid M. L.; Lubbe, Robert Henricus Johannes van der; Postma, Albert

doi:10.1007/s00221-002-1365-5

Cited by 75 publications

(97 citation statements)

References 41 publications

(71 reference statements)

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“…However, the perception of this information is not always accurate, as demonstrated by numerous studies that have shown the presence of large perceptual errors when judging an orientation. For example, in the haptic modality, several studies have shown that blindfolded people can misalign two bars by as much 55°when the bars are widely separated (e.g., Kappers, 1999;Postma, Zuidhoek, Noordzij, & Kappers, 2008;Zuidhoek, Kappers, van der Lubbe, & Postma, 2003). Similar effects have also been observed in the visual modality, which has traditionally been studied more extensively than the haptic modality.…”

Section: Introductionmentioning

confidence: 71%

“…Moreover, comparing the results of standard studies with those that involved the transfer of orientation between two locations suggests that different experimental factors might affect the underlying reference frame and the parameters of the extended CA model. For example, such a view would be in agreement with the observation that an unfilled delay leads a reduction of the systematic errors in the parallelity, which can be interpreted as a shift from the egocentric toward the allocentric reference during the delay period (Zuidhoek et al, 2003), but has no bearing on the oblique effect unless the delay is filled with an interpolated task (Gentaz & Hatwell, 1999). Still, this view does not exclude the possibility that the same factors affect both sets of processes.…”

Section: Limits Of the Extended Ca Modelmentioning

confidence: 85%

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The perception and representation of orientations: A study in the haptic modality

Baud-Bovy

Gentaz

2012

Acta Psychologica

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This research examines the haptic perception of orientations in the frontal plane in order to identify the nature of their representation. Blindfolded participants inserted the tip of the index finger into a thimble mounted on the extremity of a haptic interface and manually explored the orientation of a "virtual rod". After a short delay, participants had to reproduce the scanned orientation with the same hand without the guidance of the virtual rod. The analysis of the systematic errors showed that the recalled orientations were markedly biased toward the nearest diagonal in each quadrant with the exception of the orientations nearest to the vertical, which were biased toward the vertical. The variable error was greater for the oblique orientations than for the horizontal or vertical orientation. These results are interpreted with the Category-Adjustment model, which posits that orientations are categorically represented. We show that it is necessary to assume the existence of vertical and horizontal categories in addition to the previously postulated oblique categories to predict the error patterns observed in the present and former studies. The similarity of the error patterns in the visual and haptic modalities suggests that a common mechanism is at play in perceiving and reproducing orientations in both sensory modalities.

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Section: Introductionmentioning

confidence: 71%

Section: Limits Of the Extended Ca Modelmentioning

confidence: 85%

The perception and representation of orientations: A study in the haptic modality

Baud-Bovy

Gentaz

2012

Acta Psychologica

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“…Zuidhoek et al (2003) have shown that in the parallelity experiment, a time delay in between the exploration of the reference bar and the setting of the test bar results in significantly smaller deviations. A delay supposedly induces a shift from the egocentrically biased spatial representation towards a more allocentric one (e.g., Rossetti, Gaunet, & Thinus-Blanc, 1996).…”

Section: Introductionmentioning

confidence: 94%

“…It has been shown that a time delay between exploring the reference bar and orienting the test bar, results in significantly smaller deviations (Zuidhoek et al, 2003). Zuidhoek and colleagues suggested that the role of visual imagery might play a role in strengthening the allocentric representation of space, which in turn would result in smaller deviations.…”

Section: Experiments 3: Visual Trainingmentioning

confidence: 99%

“…Several studies have shown that what is perceived haptically as parallel deviates far from physically parallel (e.g., Kaas & Van Mier, 2006;Kappers, 1999Kappers, , 2003Kappers & Koenderink, 1999;Newport, Rabb, & Jackson, 2002;Zuidhoek, Kappers, Van der Lubbe, & Postma, 2003). Interestingly, these deviations are not random but very systematic: in order to feel parallel, the right bar has to be rotated clockwise with respect to the left bar.…”

Section: Introductionmentioning

confidence: 99%

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How robust are the deviations in haptic parallelity?

Kappers¹,

Postma²,

Viergever³

2008

Acta Psychologica

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Several studies have shown that physically parallel bars do not feel parallel and vice versa. The most plausible cause of this deviation is the biasing influence of an egocentric reference frame. The aim of the present study was to assess the strength of this egocentric contribution. The deviations from veridicality were measured in six experiments where subjects were presented with either haptic or visual information about parallelity or their deviations. It was found that even direct error feedback (either haptically or visually) did not even nearly result in veridical performance. The improvements found were attributed to a shift in focus towards a more allocentric reference frame, possibly reflecting the same mechanisms as found in delay and noninformative vision studies. We conclude that the illusionary percept of haptic parallelity is rather robust and is indeed caused by a strong reliance on an egocentric reference frame.

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Haptic perception

Kappers

Tiest

2013

WIRES Cognitive Science

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Fueled by novel applications, interest in haptic perception is growing. This paper provides an overview of the state of the art of a number of important aspects of haptic perception. By means of touch we can not only perceive quite different material properties, such as roughness, compliance, friction, coldness and slipperiness, but we can also perceive spatial properties, such as shape, curvature, size and orientation. Moreover, the number of objects we have in our hand can be determined, either by counting or subitizing. All these aspects will be presented and discussed in this paper. Although our intuition tells us that touch provides us with veridical information about our environment, the existence of prominent haptic illusions will show otherwise. Knowledge about haptic perception is interesting from a fundamental viewpoint, but it also is of eminent importance in the technological development of haptic devices. At the end of this paper, a few recent applications will be presented. WIREs Cogn Sci 2013, 4:357-374. DOI: 10.1002/wcs.1238 CONFLICT OF INTEREST: The authors have declared no conflicts of interest for this article. For further resources related to this article, please visit the WIREs website.

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Delay improves performance on a haptic spatial matching task

Cited by 75 publications

References 41 publications

The perception and representation of orientations: A study in the haptic modality

The perception and representation of orientations: A study in the haptic modality

How robust are the deviations in haptic parallelity?

Haptic perception

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