Spatial acuity and summation on the hand: The role of thermal cues in material discrimination

Yang, Gi-Hun; Kwon, Dong‐Soo; Jones, Lynette A.

doi:10.3758/app.71.1.156

Cited by 32 publications

(19 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although our data provide no evidence for a dependency of the thermal gradient on the four tested configurations, all subjects were able to perceive a thermal gradient (two distinct temperatures) at the level of the fingertip. This finding is novel as previous research reported no capability to discriminate two different, adjacent, materials through thermal stimulation only (Yang et al, 2009). The divergence between the results might be due to the difference of the thermal stimulations.…”

Section: Thermal Feedback To Convey Encoded Information At the Fingertipcontrasting

confidence: 51%

“…Although this might be related to previous research showing that two distinct materials cannot be discriminated under one single fingertip based on thermal cues alone (Yang et al, 2009), no study has yet investigated whether several distinct and constant temperatures can be differentiated under the fingertip. This may be of great importance for novel applications of thermal interfaces such as using the display to present scalar, non-thermal information to the user under the form of encoded thermal stimuli (Zerkus et al, 1994;MacLean and Roderick, 1999).…”

Section: Gallo Et Al Encoded and Crossmodal Thermal Stimulationmentioning

confidence: 77%

“…The minimum distance required to differentiate two distinct thermal stimuli will determinate the minimum size of the display. Although differentiating more than two simultaneous stimuli under the fingertip would increase the amount of encoded information, spatial summation (Kenshalo et al, 1967) and low spatial resolution (Yang et al, 2009) of the skin suggests that the differentiation of more than two neighboring stimuli on the fingertip will be difficult. Thus, we studied the minimal perceivable temperature difference between two stimuli (just noticeable difference, JND) at two distinct locations.…”

Section: Material Methods and Proceduresmentioning

confidence: 99%

See 2 more Smart Citations

Encoded and Crossmodal Thermal Stimulation through a Fingertip-Sized Haptic Display

et al. 2015

View full text Add to dashboard Cite

Haptic displays aim at artificially creating tactile sensations by applying tactile features to the user's skin. Although thermal perception is a haptic modality, it has received scant attention possibly because humans process thermal properties of objects slower than other tactile properties. Yet, thermal feedback is important for material discrimination and has been used to convey thermally encoded information in environments in which vibrotactile feedback might be masked by noise and/or movements. Moreover, the well-reported influence of temperature over tactile processing makes thermal displays good candidates for the development of crossmodal haptic interfaces, in which temperature is used to manipulate other sensations. Here, we present a thermal display able to render four individually controlled temperatures at the user's fingertip along with its technical characterization and psychophysical evaluation. Device performance was assessed in terms of accuracy and repeatability. In the psychophysical evaluation, we first show that the device can render perceivable temperature gradients at the level of the fingertip, thereby extending the concept of thermally encoded information to fingertip-sized thermal displays. Second, we show that increasing temperature improves stiffness precision. Results show that neglected features of thermal feedback, i.e., encoded and crossmodal thermal stimulation, can be provided by fingertip-sized thermal displays to improve haptic manipulations.

show abstract

Section: Thermal Feedback To Convey Encoded Information At the Fingertipcontrasting

confidence: 51%

Section: Gallo Et Al Encoded and Crossmodal Thermal Stimulationmentioning

confidence: 77%

Section: Material Methods and Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

Encoded and Crossmodal Thermal Stimulation through a Fingertip-Sized Haptic Display

et al. 2015

View full text Add to dashboard Cite

show abstract

“…To improve the accuracy of the thermal response prediction, studies have proposed models that consider the effect of metabolic heat generation and blood perfusion 38-41 or divide the skin into several layers based on its anatomical structure. 9,41-43 To date, various thermal models have been proposed for modeling the heat transfer process during hand-object interactions (for a full review, see ref.…”

Section: Physical Processmentioning

confidence: 99%

Material recognition based on thermal cues: Mechanisms and applications

2017

Temperature

View full text Add to dashboard Cite

Some materials feel colder to the touch than others, and we can use this difference in perceived coldness for material recognition. This review focuses on the mechanisms underlying material recognition based on thermal cues. It provides an overview of the physical, perceptual, and cognitive processes involved in material recognition. It also describes engineering domains in which material recognition based on thermal cues have been applied. This includes haptic interfaces that seek to reproduce the sensations associated with contact in virtual environments and tactile sensors aim for automatic material recognition. The review concludes by considering the contributions of this line of research in both science and engineering.

show abstract

“…Many thermal tactile displays have been developed to evaluate the importance of thermal cues in object identification and discrimination [2][3][4]. These displays mainly consist of a Peltier device, temperature sensors and a temperature-control system that monitors and controls the surface temperature of the device [5].…”

Section: Introductionmentioning

confidence: 99%

Design and Evaluation of a Thermal Tactile Display for Colour Rendering

Jia

Chen

2015

International Journal of Advanced Robotic Systems

View full text Add to dashboard Cite

This paper proposes a novel method of manipulating both thermal change rate and thermal intensity to convey colour information by using a thermal tactile display. The colourspace transformation from {red, green, blue} to {hue, saturation, intensity} is introduced, and the mapping between colour and temperature is established based on warm and cold colours. Considering the lower resolution of the tactile channel, six limited stimulation levels are generated to represent colours. Based on the semi-infinite body model, the thermal response within the skin for each stimulation form is investigated. The Peltier element of the display is designed to convey different thermal stimuli to the human finger. Two experiments are performed to evaluate the performance of the display: colour identification and discrimination. Experimental results indicate that there is a response bias among the perceived colours for the traditional method of only employing thermal intensity, but there is no response bias for the proposed method; subjects' mean recognition accuracy with the proposed method is significantly higher than that gained using the traditional method. Furthermore, colour information of the captured images can be reliably discriminated by using this devised thermal tactile display.

show abstract

Spatial acuity and summation on the hand: The role of thermal cues in material discrimination

Cited by 32 publications

References 25 publications

Encoded and Crossmodal Thermal Stimulation through a Fingertip-Sized Haptic Display

Encoded and Crossmodal Thermal Stimulation through a Fingertip-Sized Haptic Display

Material recognition based on thermal cues: Mechanisms and applications

Design and Evaluation of a Thermal Tactile Display for Colour Rendering

Contact Info

Product

Resources

About