Mid-Air Action Contributes to Pseudo-Haptic Stiffness Effects

Kawabe, Takahiro

doi:10.1109/toh.2019.2961883

Cited by 20 publications

(15 citation statements)

References 40 publications

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“…The physics element may not help to understand collisions either, as the experimental conditions with the physics element did not show significant difference in task performance compared to the conditions without. The physics element is proved to be useful to simulate haptic effects [41] and support more complicate interaction task, such as perceive the softness or texture [42]. However, our results contradict with previous works [38], showing as the visuo-tactile synesthesia illusion was reported in See-through condition, not in the conditions with metaphors of force (Deformation and Hybrid).…”

Section: Information Detailcontrasting

confidence: 99%

Using visual feedback to improve hand movement accuracy in confined-occluded spaces in virtual reality

Wang

Yao

et al. 2022

Vis Comput

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Accurate and informative hand-object collision feedback is of vital importance for hand manipulation in virtual reality (VR). However, to our best knowledge, the hand movement performance in fully-occluded and confined VR spaces under visual collision feedback is still under investigation. In this paper, we firstly studied the effects of several popular visual feedback of hand-object collision on hand movement performance. To test the effects, we conducted a within-subject user study (n=18) using a target-reaching task in a confined box. Results indicated that users had the best task performance with see-through visualization, and the most accurate movement with the hybrid of proximity-based gradation and deformation. By further analysis, we concluded that the integration of see-through visualization and proximity-based visual cue could be the best compromise between the speed and accuracy for hand movement in the enclosed VR space. On the basis, we designed a visual collision feedback based on projector decal,which incorporates the advantages of see-through and color gradation. In the end, we present demos of potential usage of the proposed visual cue.

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Section: Information Detailcontrasting

confidence: 99%

Using visual feedback to improve hand movement accuracy in confined-occluded spaces in virtual reality

Wang

Yao

et al. 2022

Vis Comput

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“…The participants reported the subjective stiffness of the material in a five-point scale. Kawabe (2020) found that the material with the higher Poisson's ratio was reported to be softer than the material with the lower Poisson's ratio. The results are consistent with previous studies showing that the stiffness of an elastic material is judged on the basis of the image statistics of image motion/deformation (Kawabe and Nishida, 2016;Bi et al, 2019).…”

Section: Introductionmentioning

confidence: 97%

“…Rather, Kawabe (2019) discussed that human observers judged the causality on the basis of image features related to material deformation. Under the different scenario, Kawabe (2020) found that the Poisson's ratio modulated the softness perception in the pseudo-haptic feedback. In the researcher's experimental setting, a participant moved their hands in front of an LCD monitor displaying an elastic material.…”

Section: Introductionmentioning

confidence: 98%

“…Additionally, we explored the effect of the direction of stretching/squashing on the judgment. In the previous studies (Kawabe, 2019(Kawabe, , 2020, the perception of the Poisson effect was examined by using the stimuli wherein a material was horizontally stretched. In this study, we examined whether there are differences in judgment between the horizontal and vertical stretching/squashing situations of a material.…”

Section: Introductionmentioning

confidence: 99%

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Perceptual Properties of the Poisson Effect

Kawabe

2021

Front. Psychol.

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When an elastic material (e.g., fabric) is horizontally stretched (or compressed), the material is compressed (or extended) vertically – so-called the Poisson effect. In the different case of the Poisson effect, when an elastic material (e.g., rubber) is vertically squashed, the material is horizontally extended. In both cases, the visual system receives image deformations involving horizontal expansion and vertical compression. How does the brain disentangle the two cases and accurately distinguish stretching from squashing events? Manipulating the relative magnitude of the deformation of a square between horizontal and vertical dimensions in the two-dimensional stimuli, we asked observers to judge the force direction in the stimuli. Specifically, the participants reported whether the square was stretched or squashed. In general, the participant’s judgment was dependent on the relative deformation magnitude. We also checked the anisotropic effect of deformation direction [i.e., horizontal vs. vertical stretching (or squashing)] and found that the participant’s judgment was strongly biased toward horizontal stretching. We also observed that the asymmetric deformation pattern, which indicated the specific context of force direction, was also a strong cue to the force direction judgment. We suggest that the brain judges the force direction in the Poisson effect on the basis of assumptions about the relationship between image deformation and force direction, in addition to the relative image deformation magnitudes between horizontal and vertical dimensions.

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“…So far, pseudo-haptic feedback has been studied in situations, where a user manipulates a virtual object (e.g., a cursor) by operating a computer mouse ( Lécuyer et al, 2004 ; Dominjon et al, 2005 ; Kumar et al, 2017 ), tablet PCs ( Ujitoko et al, 2015 ; Costes et al, 2019 ), pen devices ( Ujitoko et al, 2019a , b ), virtual hands ( Sato et al, 2020 ), real objects ( Brewster et al, 2019 ), and mixed reality technologies ( Ban et al, 2012 ; Issartel et al, 2015 ; Kawabe, 2020 ). The use of these devices involves hand movements that are more or less consistent in direction with the movement of the virtual object.…”

Section: Introductionmentioning

confidence: 99%

Sense of Resistance for a Cursor Moved by User’s Keystrokes

et al. 2021

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Haptic sensation of a material can be modulated by its visual appearance. A technique that utilizes this visual-haptic interaction is called as pseudo-haptic feedback. Conventional studies have investigated pseudo-haptic feedback in situations, wherein a user manipulated a virtual object using a computer mouse, a force-feedback device, etc. The present study investigated whether and how it was possible to offer pseudo-haptic feedback to a user who manipulated a virtual object using keystrokes. Participants moved a cursor toward a destination by pressing a key. While the cursor was moving, the cursor was temporarily slowed down on a square area of the screen. The participants’ task was to report, on a five-point scale, how much resistance they felt to the cursor’s movement. In addition to the basic speed of the cursor, the ratio of the basic speed to the speed within the square area was varied. In Experiment 1, we found that these two factors interacted significantly with each other, but further analysis showed that the cursor speed within the square area was the most important determinant of perceived resistance. In Experiment 2, consistent with the results of the previous experiment, it was found that the cursor movement outside of the square area was not required to generate the sense of resistance. Counterintuitively, in Experiment 3, the sense of resistance was apparent even without user’s keystrokes. We discuss how the sense of resistance for a cursor moved by keystrokes can be triggered visually, but interpreted by the brain as a haptic impression.

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Mid-Air Action Contributes to Pseudo-Haptic Stiffness Effects

Cited by 20 publications

References 40 publications

Using visual feedback to improve hand movement accuracy in confined-occluded spaces in virtual reality

Using visual feedback to improve hand movement accuracy in confined-occluded spaces in virtual reality

Perceptual Properties of the Poisson Effect

Sense of Resistance for a Cursor Moved by User’s Keystrokes

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