Usability Parameters for Touchscreen-based Haptic Perception
Publication Name: IEEE Haptics Symposium '16
Despite the advancements in touchscreen technologies, there is a surprising dearth of research on touchscreen-based haptic perception and guidance on best practices for haptic interface-design employing these devices. We address these shortcomings by investigating several key usability parameters and spatio-cognitive abilities pertinent to haptic information access via touchscreen devices. Two preliminary psychophysically-inspired usability studies investigated the haptic thresholds for detecting (Exp 1) and tracing (Exp 2) graphical stimuli rendered on a touchscreen interface. We found that a minimum of 1mm width is necessary for detecting lines using haptic feedback (i.e., vibrotactile or electrostatic stimulation) and a width of at least 3mm should be maintained for effective line tracing. Results provide foundational guidelines for designing information content that is optimized for rendering on touchscreen displays. Findings also demonstrate the importance of and need for further investigations into the usability parameters and cognitive abilities required for the design of effective haptic interfaces.
Palani, H.P., and Giudice, N.A. (2016). Usability parameters for touchscreen-based haptic perception. Work in progress paper presented at the IEEE Haptics Symposium. April, Philadelphia PA, USA.