Perception of a Haptic Stimulus Presented Under the Foot Under Workload

Tchakouté, Landry Delphin Chapwouo; Ménélas, Bob-Antoine J.

doi:10.3390/s20082421

Cited by 3 publications

(6 citation statements)

References 41 publications

(69 reference statements)

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“…In the literature, one can find publications in which the results of research on determining the vibrotactile thresholds are presented, but both the measurement procedures and used devices are individually selected by scientists each time. Examples of vibrotactile detection methods are shown in the publications [ 4 , 16 , 34 ]. In the indicated publications, the measurement procedure and, in particular, the technical solutions used have not been described in detail, and the application of similar solutions could be difficult.…”

Section: Discussionmentioning

confidence: 99%

“…Many conferences are being conducted on this subject because despite the existence of considerable knowledge, there remains much to be researched in this field; to this end, the WHC World Haptics Conference is held every two years [ 3 ]. Various parameters related to the feeling of vibrations and pressure forces are tested, such as the vibrotactile perception threshold [ 4 ] and simple reaction time and response time [ 5 ]. The described research was inspired by the design of a vibrating bracelet for blind and partially sighted people, in line with the idea of a smart city for all.…”

Section: Introductionmentioning

confidence: 99%

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Module for Monitoring the Probe-Skin Contact Force in the Study of Vibration Perception on the Wrist

Czopek

Barański

Wiciak

2021

Sensors

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This paper presents a module for monitoring the contact force between a probe for measuring vibration perception on the wrist and the skin. The module was designed for an original measuring stand for the automatic testing of the vibrotactile discrimination thresholds using the psychophysical adaptive method of 1 up–2 down with two or three interval forced choices (2IFC, 3IFC). Measurement methods were implemented in LabVIEW software. The inspiration for the project was the need to check the possibility of building a vibrating interface for transmitting information through vibrations delivered to the wrist via a bracelet. The test procedure on the wrist is not standardized; however, during its development, the recommendations of the Polish Norm–International Organization for Standardization PN-ISO 13091-1, 2006 were adopted. This standard contains methods for measuring vibration sensation thresholds on the fingertips for the assessment of neural dysfunction. The key to the repeatability of measurements seems to be the ability to continuously control the pressure of the measuring probe on the skin. This article compares two solutions for measuring the contact force along with an analysis of their accuracy and the impact of vibrations on the measured values. Moreover, the results of measurements of vibrotactile amplitude and frequency discrimination thresholds obtained on the ventral wrist at five frequencies (25, 32, 63, 125 and 250 Hz) are presented.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Module for Monitoring the Probe-Skin Contact Force in the Study of Vibration Perception on the Wrist

Czopek

Barański

Wiciak

2021

Sensors

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“…Several related studies have reported that haptic feedback improves the response time and performance [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. In particular, in environments requiring visual attention such as driving, lack of haptic feedback could considerably hinder safety, making such critical feedback [ 10 , 20 , 21 ].…”

Section: Related Workmentioning

confidence: 99%

Development of a Human-Display Interface with Vibrotactile Feedback for Real-World Assistive Applications

Kim

Jeong

Cho

et al. 2021

Sensors

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It is important to operate devices with control panels and touch screens assisted by haptic feedback in mobile environments such as driving automobiles and electric power wheelchairs. A lot of consideration is needed to give accurate haptic feedback, especially, presenting clear touch feedback to the elderly and people with reduced sensation is a very critical issue from healthcare and safety perspectives. In this study, we aimed to identify the perceptual characteristics for the frequency and direction of haptic vibration on the touch screen with vehicle-driving vibration and to propose an efficient haptic system based on these characteristics. As a result, we demonstrated that the detection threshold shift decreased at frequencies above 210 Hz due to the contact pressure during active touch, but the detection threshold shift increased at below 210 Hz. We found that the detection thresholds were 0.30–0.45 gpeak with similar sensitivity in the 80–270 Hz range. The haptic system implemented by reflecting the experimental results achieved characteristics suitable for use scenarios in automobiles. Ultimately, it could provide practical guidelines for the development of touch screens to give accurate touch feedback in the real-world environment.

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“…23 The nature of the concomitant task affected the identification of vibrotactile messages; perception was less influenced by purely cognitive tasks, e.g., counting forwards or backward, in comparison to motor tasks, such as walking. 24 Building upon this reasoning, Mortimer and collaborators investigated different concomitant tasks, reporting that not all tasks interfered with the identification of haptic messages, speculating that tasks with high cognitive load may lead to low identification rates. 25 Engaging in multiple activities simultaneously can generally impair the performance of all involved activities due to the intrinsic limitations of the nervous system when processing concomitant information.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, auditory and visual distractors affected greatly the detection times of vibrotactile messages, and several methods (e.g., icon metaphor and family‐based design) were proposed to make haptic messages more robust 23 . The nature of the concomitant task affected the identification of vibrotactile messages; perception was less influenced by purely cognitive tasks, e.g., counting forwards or backward, in comparison to motor tasks, such as walking 24 . Building upon this reasoning, Mortimer and collaborators investigated different concomitant tasks, reporting that not all tasks interfered with the identification of haptic messages, speculating that tasks with high cognitive load may lead to low identification rates 25 .…”

Section: Introductionmentioning

confidence: 99%

Improving electrotactile communication with a multi‐pad electrode under cognitive load

Jure,

Spaich,

Petrini

et al. 2023

Artificial Organs

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BackgroundElectrotactile systems are compact interfaces that can be used to convey information through the skin by producing a range of haptic sensations. In many applications, however, the user needs to perceive and interpret haptic stimulation while being engaged in parallel activities. Developing methods that ensure reliable recognition of electrotactile messages despite additional cognitive load is, therefore, an important step for the practical application of electrotactile displays.MethodsThis study investigated if a simple strategy of repeating electrotactile messages can improve message identification during multitasking. Ten participants identified 36 spatiotemporal electrotactile messages delivered through a 3 × 2 pad–matrix electrode placed on the torso while performing a concomitant cognitive task in three conditions: the messages were presented once (No‐REP), and each message was repeated three (REP3) and five (REP5) times. The main outcome measure was the success rate (SR) of message identification.ResultsDuring multitasking, in the No‐REP condition, the SR (median (IQR)) dropped to 56.25% (22.62%), demonstrating that the cognitive task decreased performance. However, the SR significantly improved with message repetitions, reaching 72.92% (21.87%) and 81.25% (18.66%) in REP3 and REP5 conditions respectively, without a statistically significant difference between REP3 and REP5.ConclusionsMultitasking affected the efficacy of haptic communication, but message repetition was shown to be an effective strategy for improving performance. Additionally, only three repetitions were enough, as an additional increase in the duration of message transmission (5 repetitions) did not lead to further improvement. This study is an important step toward delivering electrotactile communication that can cope with the demands of real‐world applications.

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Perception of a Haptic Stimulus Presented Under the Foot Under Workload

Cited by 3 publications

References 41 publications

Module for Monitoring the Probe-Skin Contact Force in the Study of Vibration Perception on the Wrist

Module for Monitoring the Probe-Skin Contact Force in the Study of Vibration Perception on the Wrist

Development of a Human-Display Interface with Vibrotactile Feedback for Real-World Assistive Applications

Improving electrotactile communication with a multi‐pad electrode under cognitive load

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