FORCE FEEDBACK IN PSYCHOPHYSICS RESEARCH: EVEN LOW PERFORMANCE ALGORITHMS MAY LEAD TO REALISTIC PERCEPTUAL EXPERIENCE
Force feedback perception is relevant with many applications such as virtual simulation, 3D modeling or assembly/disassembly training. In this work we claim that the â€œ1 KHz ruleâ€ (Coles, Meglan, & John, 2011) is not essential for the analysis of force feedback perceptual capabilities and we provide experimental evidences to support this statement. We implemented a virtual wall penetration task to study stiffness discrimination. Participants were asked to move a tool through a virtual wall (stiffness values: 331, 207, 83 N/m), and to immediately retract when it has been completely perforated. Three physics engine refresh rates have been tested (250, 500 and 1000 Hz) and performance of 8 participants have been analyzed in terms of overshoot error and velocity. No refresh rate effects emerged. We argue that force perception can be also investigated using low frequency rates: thus psychophysic studies are not bounded to expensive computers and devices.