The Haptic Analog of the Visual Aubert-Fleischl Phenomenon

Moscatelli, Alessandro; Scheller, Meike; Kowalski, Gabriele Joanna; Ernst, Marc O.

doi:10.1007/978-3-662-44196-1_5

Cited by 4 publications

(9 citation statements)

References 14 publications

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“…Thus, in order to generate the observed bias, proprioceptive velocity discrimination had to be three-fold noisier than tactile velocity discrimination. However, comparing the results across different studies 12 13 14 16 17 , the response noise in cutaneous touch was no more than 50% larger than in proprioception.…”

Section: Resultsmentioning

confidence: 90%

“…Assuming a single prior, the Bayesian model would predict a large difference in the sensory noise between proprioception and cutaneous touch. Several earlier studies have shown that this is not necessarily the case 12 13 14 17 . Introducing two zero-mean priors with a different variances in each of the two estimates would extend the model to fit datasets like ours, where the difference in JND between the two discrimination tasks is small.…”

Section: Discussionmentioning

confidence: 90%

“…Humans can estimate v prop 12 13 14 and v tact 15 16 17 accurately when presented in isolation. Therefore, observers could in principle estimate v surf in the main task as well as in the control task, provided that they were able to correctly sum cutaneous and proprioceptive sources of information, as expressed by equation (1) .…”

Section: Resultsmentioning

confidence: 99%

“…A crude analogy between vision and touch might consider that the finger is like the eye and the fingertip skin is like the retina. It can be independently established that the proprioceptive inputs from the upper limb are noisier than the tactile inputs, the difference in noise reported in the literature ranges from 10% to 50% 12 13 14 17 . Thus, we wondered if the noise difference in the two sources of information could account for the observed effect.…”

Section: Resultsmentioning

confidence: 99%

“…According to standard results in mathematical statistics, with a greater variance of the sensory inputs, comes a greater influence of the prior on the posterior estimates 20 21 . Since the proprioceptive inputs are noisier than the tactile inputs 12 13 14 17 , the stationarity prior has a different influence on each of the two posterior distributions. Therefore, the mean of should be closer to zero than that of .…”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Illusory Tactile Motion Perception: An Analog of the Visual Filehne Illusion

Moscatelli¹,

Hayward²,

Wexler³

et al. 2015

Sci Rep

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We continually move our body and our eyes when exploring the world, causing our sensory surfaces, the skin and the retina, to move relative to external objects. In order to estimate object motion consistently, an ideal observer would transform estimates of motion acquired from the sensory surface into fixed, world-centered estimates, by taking the motion of the sensor into account. This ability is referred to as spatial constancy. Human vision does not follow this rule strictly and is therefore subject to perceptual illusions during eye movements, where immobile objects can appear to move. Here, we investigated whether one of these, the Filehne illusion, had a counterpart in touch. To this end, observers estimated the movement of a surface from tactile slip, with a moving or with a stationary finger. We found the perceived movement of the surface to be biased if the surface was sensed while moving. This effect exemplifies a failure of spatial constancy that is similar to the Filehne illusion in vision. We quantified this illusion by using a Bayesian model with a prior for stationarity, applied previously in vision. The analogy between vision and touch points to a modality-independent solution to the spatial constancy problem.

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Section: Resultsmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Illusory Tactile Motion Perception: An Analog of the Visual Filehne Illusion

Moscatelli¹,

Hayward²,

Wexler³

et al. 2015

Sci Rep

View full text Add to dashboard Cite

show abstract

Sensorymotor Synergies: Fusion of Cutaneous Touch and Proprioception in the Perceived Hand Kinematics

Moscatelli

Bianchi

Serio

et al. 2016

Springer Series on Touch and Haptic Systems

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According to classical studies in physiology, muscle spindles and other receptors from joints and tendons provide crucial information on the position of our body and our limbs. Cutaneous cues also provide an important contribution to our sense of position. For example, it is possible to induce a vivid sensation of movement in the anesthetized finger, by stretching the skin around the proximal interphalangeal joint. However, much of proprioceptive literature did not consider the role of tactile interaction with external objects as position and motion cues. Whenever we touch an external, stationary object, the contact forces produce a mechanical deformation of the skin which changes with the hand posture and movement. Therefore, these cutaneous contact cues might also provide proprioceptive information. In this paragraph, evaluated this hypothesis based on recently published experimental data

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Tactile rendering based on skin stress optimization

2020

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We present a method to render virtual touch, such that the stimulus produced by a tactile device on a user's skin matches the stimulus computed in a virtual environment simulation. To achieve this, we solve the inverse mapping from skin stimulus to device configuration thanks to a novel optimization algorithm. Within this algorithm, we use a device-skin simulation model to estimate rendered stimuli, we account for trajectory-dependent effects efficiently by decoupling the computation of the friction state from the optimization of device configuration, and we accelerate computations using a neural-network approximation of the device-skin model. Altogether, we enable real-time tactile rendering of rich interactions including smooth rolling, but also contact with edges, or frictional stick-slip motion. We validate our algorithm both qualitatively through user experiments, and quantitatively on a BioTac biomimetic finger sensor.

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The Haptic Analog of the Visual Aubert-Fleischl Phenomenon

Cited by 4 publications

References 14 publications

Illusory Tactile Motion Perception: An Analog of the Visual Filehne Illusion

Illusory Tactile Motion Perception: An Analog of the Visual Filehne Illusion

Sensorymotor Synergies: Fusion of Cutaneous Touch and Proprioception in the Perceived Hand Kinematics

Tactile rendering based on skin stress optimization

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