Investigating Multimodal Displays: Reaction Times to Visual and Tactile Modality Stimuli

Yu, Jing; Möeller, Knut

doi:10.1007/978-3-319-02913-9_122

Cited by 1 publication

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In case of the lowest feedback level, the time between two stimuli was 250 ms, which is the minimum time required by the subject to be able to determine the feedback level. These response times might be a bit larger than the minimum delay between sensing and actuation that can be detected by a subject [17], but is comparable to the reaction times of subjects provided with vibrotactile stimulation [18]. Reduction of the time between stimuli would be one of the first things to improve in a future setup.…”

Section: Discussionmentioning

confidence: 96%

Pneumatic Feedback for Wearable Lower Limb Exoskeletons Further Explored

Muijzer-Witteveen

Guerra

Sluiter

et al. 2016

Haptics: Perception, Devices, Control, and Applications

View full text Add to dashboard Cite

For optimal control of wearable lower limb exoskeletons the sensory information flow should also be (partly) restored, especially when the users are Spinal Cord Injury subjects. Several methods, like electrotactile or electromechanical vibrotactile stimulation, to provide artificial sensory feedback have been studied thoroughly and showed promising results. Pneumatic tactile stimulation might be an alternative to these methods, because the stimulation amplitudes can be larger and in cases of force feedback, the modality of stimulation and sensing can be matched. In this study we have developed a setup that can provide pneumatic feedback with four feedback levels via three stimulation modalities:(1) amplitude modulation, (2) position modulation and (3) frequency modulation. The differences in subject stimulus perception between these three stimulation modalities were evaluated through a magnitude estimation task performed with 10 healthy subjects. Percentages correctly identified feedback levels were significantly higher for frequency modulation than the other two stimulation modalities. Also through questionnaires the subjects indicated that feedback through frequency modulation was the most intuitive and the only method where addition of an extra feedback level was indicated as possible. The results of this study show that pneumatic feedback is feasible, can provide high percentages of feedback level discrimination that are at least comparable to vibrotactile stimulation and therefore encourages further research to optimize the pneumatic setup.

show abstract

Section: Discussionmentioning

confidence: 96%