Aging effect on tactile perception: Experimental and modelling studies

Amaied, Emna; Vargiolu, R.; Bergheau, Jean‐Michel; Zahouani, H.

doi:10.1016/j.wear.2015.02.030

Cited by 31 publications

(12 citation statements)

References 17 publications

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“…Not all of the perceptual changes found in aging can be attributed to low-level changes in sensory factors (Owsley, 2011 for review;Spear, 1993). Interestingly, while tactile sensation has been found to decrease in aging (Amaied, Vargiolu, Bergheau, & Zahouani, 2015), 3D tactile perception remains intact (Norman et al, 2011), supporting the viewpoint that impairments in 3D perception in aging largely reflect high-level perceptual, rather than low-level sensory deficits.…”

Section: Discussionmentioning

confidence: 99%

Aging changes 3D perception: Evidence for hemispheric rebalancing of lateralized processes

2017

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When judging the 3D shape of a shaded image, young observers assume that the light source is placed above and to the left. This leftward bias has been attributed to hemispheric lateralization or experiential factors. Since aging is associated with loss of hemispheric lateralization, in the current study we measured the effect of aging on the assumed light source direction. Older participants exhibited, on average, a decreased left bias compared to young participants, as well as greater within-group variability in the distribution of assumed light source directions. In a separate sample of young and old participants, we replicated the age related effect in the assumed light source direction. Furthermore, in both young and old participants the assumed light source direction and the lateralized bias in a line bisection task were correlated. These findings suggest that diminished hemispheric lateralization, which accompanies aging, may affect the perception of the 3D structure of shaded surfaces. Shape from shading may thus provide a simple behavioral tool to track age related changes in hemispheric organization.

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Section: Discussionmentioning

confidence: 99%

Aging changes 3D perception: Evidence for hemispheric rebalancing of lateralized processes

2017

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“…In the literature, the friction coefficient, power spectral density (PSD) and average vibratory level (La(dB)) are the quantitative parameters most often used 29 , 32 – 35 . PSD is a parameter related to the spatial resolution of the human finger, which is identified as the characteristic wavelength corresponding to the maximum power spectral density.…”

Section: Methodsmentioning

confidence: 99%

Impact of finger biophysical properties on touch gestures and tactile perception: Aging and gender effects

Abdouni

Vargiolu

Zahouani

2018

Sci Rep

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The human finger plays an extremely important role in tactile perception, but little is known about the role of its biophysical properties (mechanical properties, contact properties and surface topography) in tactile perception. In addition, the touch gestures used to perceive an object’s properties differ among people. We combined studies on the biophysical properties and the vibrations measured from the human finger to understand the age and gender effects on the tactile perception and the difference between the touch gestures. In addition, a new algorithm, Mel-frequency cepstral coefficients (MFCCs), was used to analyze the vibratory signal obtained from the physical contact of the finger, and a surface is proposed and validated. The values obtained regarding the correlation between the tribohaptic system results and the biophysical properties show that the Young’s modulus and the surface topography are the most important. An inverse correlation was observed between the MFCC and the tactile perception. This last observation explained the results of better tactile perception with left to right touch gestures. It also demonstrated a better tactile perception for women.

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“…It is now well-known that touch involves a sensory and emotional integration (Chaplan et al, 1994;Armaied et al, 2005;Rolls and Kesner, 2006;Spapé et al, 2015;Schirmer and Adolphs, 2017). Nevertheless, few studies have examined the activity of the autonomic nervous system during an exploration by touching a surface.…”

Section: Touch and Emotional Developmentmentioning

confidence: 99%

Emotion Measurements Through the Touch of Materials Surfaces

Bertheaux

Toscano

Fortunier

et al. 2020

Front. Hum. Neurosci.

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The emotion generated by the touch of materials is studied via a protocol based on blind assessment of various stimuli. The human emotional reaction felt toward a material is estimated through (i) explicit measurements, using a questionnaire collecting valence and intensity, and (ii) implicit measurements of the activity of the autonomic nervous system, via a pupillometry equipment. A panel of 25 university students (13 women, 12 men), aged from 18 to 27, tested blind twelve materials such as polymers, sandpapers, wood, velvet and fur, randomly ordered. After measuring the initial pupil diameter, taken as a reference, its variation during the tactile exploration was recorded. After each touch, the participants were asked to quantify the emotional value of the material. The results show that the pupil size variation follows the emotional intensity. It is significantly larger during the touch of materials considered as pleasant or unpleasant, than with the touch of neutral materials. Moreover, after a time period of about 0.5 s following the stimulus, the results reveal significant differences between pleasant and unpleasant stimuli, as well as differences according to gender, i.e., higher pupil dilatation of women than men. These results suggest (i) that the autonomic nervous system is initially sensitive to high arousing stimulation, and (ii) that, after a certain period, the pupil size changes according to the cognitive interest induced and the emotional regulation adopted. This research shows the interest of the emotional characterization of materials for product design.

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Aging effect on tactile perception: Experimental and modelling studies

Cited by 31 publications

References 17 publications

Aging changes 3D perception: Evidence for hemispheric rebalancing of lateralized processes

Aging changes 3D perception: Evidence for hemispheric rebalancing of lateralized processes

Impact of finger biophysical properties on touch gestures and tactile perception: Aging and gender effects

Emotion Measurements Through the Touch of Materials Surfaces

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