The Influence of Cue Presentation Velocity on Skin Stretch Perception

Wearable haptic devices that convey skin stretch have been used in a broad range of applications, from prosthesis proprioception to language transmission. Despite their prevalence, rigorous evaluation of the perception of skin stretch cues is still ongoing. Prior studies indicate that skin stretch cue presentation velocity may impact cue perception, but we lack quantitative data regarding the impact of skin stretch velocity on cue perceptibility. It is important to understand the impact of presentation velocity to ensure the haptic cues are delivered in the most salient manner. In this paper, the Method of Constant Stimuli and Likert surveys were used to capture the just noticeable difference (JND) and participant impressions for two rotational velocities of the Rice Haptic Rocker. The velocities tested did not affect the JND; however, participants reported the faster speed was easier to discern. This study suggests skin stretch devices can be expected to maintain their perceptual performance at varying actuation speeds, meeting the requirements of a variety of applications.