The Effect of Variability in Stiffness on Perception and Grip Force Adjustment

Kossowsky, Hanna; Farajian, Mor; Milstein, Amit; Nisky, Ilana

doi:10.1109/toh.2021.3052136

Cited by 5 publications

(4 citation statements)

References 58 publications

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“…The general effect of uncertainty can also explain why the grip force baseline of the positive stretch session was higher than the grip force baseline of the negative stretch session from the first interaction with the object. This view corroborates the findings of our previous studies that showed that uncertainty caused participants to preserve a high safety margin throughout interactions with objects [27], [49].…”

Section: Discussionsupporting

confidence: 92%

Direction-Specific Effects of Artificial Skin-Stretch on Stiffness Perception and Grip Force Control

Farajian

Leib

Kossowsky

et al. 2023

Preprint

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When interacting with an object, we use kinesthetic and tactile information to create our perception of the object's properties and to prevent its slippage using grip force control. We previously showed that applying artificial skin-stretch together with, and in the same direction as, kinesthetic force increases the perceived stiffness. Here, we investigated the effect of the direction of the artificial stretch on stiffness perception and grip force control. We presented participants with kinesthetic force together with negative or positive artificial stretch, in the opposite or the same direction of the natural stretch due to the kinesthetic force, respectively. Our results showed that artificial skin-stretch in both directions augmented the perceived stiffness; however, the augmentation caused by the negative stretch was consistently lower than that caused by the positive stretch. Additionally, we proposed a computational model that predicts the perceptual effects based on the preferred directions of the stimulated mechanoreceptors. When examining the grip force, we found that participants applied higher grip forces during the interactions with positive skin-stretch in comparison to the negative skin-stretch, which is consistent with the perceptual results. These results may be useful in tactile technologies for wearable haptic devices, teleoperation, and robot-assisted surgery.

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Section: Discussionsupporting

confidence: 92%

Direction-Specific Effects of Artificial Skin-Stretch on Stiffness Perception and Grip Force Control

Farajian

Leib

Kossowsky

et al. 2023

Preprint

Self Cite

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“…Therefore, the effect on the grip force may have been present, while the perceptual effect was not. Previous works have demonstrated cases in which large discrepancies between sensory inputs decreases perceptual effects (Kossowsky et al, 2021;Di Luca, 2011). It is possible that due to a potentially very strong effect of the stretch on these two participants, they based their perceptual responses on the force information alone, and therefore did not display increased stiffness perception.…”

Section: Discussionmentioning

confidence: 78%

“…Using the psychometric curves, we computed the Point of Subjective Equality (PSE) and the Just Noticeable Difference (JND) of each curve, as in (Kossowsky et al, 2021Farajian et al, 2020Farajian et al, , 2023Farajian et al, , 2021Leib et al, 2015Leib et al, , 2018Banks and Ernst, 2002) The PSE and JND define the shape of the curve (Wichmann and Hill, 2001). Therefore, to assess the ability of the models to predict the participants' perception, we used the PSE and JND to define several metrics.…”

Section: Discussionmentioning

confidence: 99%

Exploring the Relation Between Stiffness Perception and Action Using Models and Artificial Neural Networks

Kossowsky

Nisky

2023

Preprint

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Applying artificial skin stretch with force feedback increases perceived stiffness and affects grip force. We explored if participants' perceptual responses in a stiffness discrimination task could be predicted solely from their action signals using models and artificial neural networks. Successful prediction could indicate a relation between participants' perception and action. We found that the skin stretch perceptual augmentation could be predicted to an extent from action signals alone. We predicted the general trend of increased predicted augmentation for increased real augmentation, and average augmentation effect across participants, but not the precise effect sizes of individual participants. This indicates some relation between participants' perceptual reports and action signals, enabling the partial prediction. Furthermore, of the action signals examined, grip force was necessary for predicting the augmentation effect, and a motion signal (e.g., position) was needed for predicting human-like perception, shedding light on what information may be present in the different signals.

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“…According to Ilana Nisky, 2021 Early Career Award winner, robot-assisted surgery can bridge the gap between laboratory-based research and real-life applications. Currently, surgical training is not optimized, partly due to a lack of haptic feedback and partly due to limited knowledge on how to measure surgical skills (4,11,23,30,45,45). Nisky's research used a teleoperated needle driving task and integrated data measuring the dynamics of the robotic manipulandum and modeling human kinematics to describe the quality of surgical skill throughout the learning process.…”

Section: Exploring Complex Motor Skills Beyond Unimanual Reachingmentioning

confidence: 99%

Highlights from the 30th Annual Meeting of the Society for the Neural Control of Movement

Russo

Ozeri-Engelhard

Hupfeld

et al. 2021

Journal of Neurophysiology

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The Effect of Variability in Stiffness on Perception and Grip Force Adjustment

Cited by 5 publications

References 58 publications

Direction-Specific Effects of Artificial Skin-Stretch on Stiffness Perception and Grip Force Control

Direction-Specific Effects of Artificial Skin-Stretch on Stiffness Perception and Grip Force Control

Exploring the Relation Between Stiffness Perception and Action Using Models and Artificial Neural Networks

Highlights from the 30th Annual Meeting of the Society for the Neural Control of Movement

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