|Title||The Rice Haptic Rocker: Comparing Longitudinal and Lateral Upper-Limb Skin Stretch Perception|
|Publication Type||Conference Proceedings|
|Year of Conference||2018|
|Authors||Clark, JP, Kim, SY, O'Malley, MK|
|Secondary Authors||Prattichizzo, D, Shinoda, H, Tan, HZ, Ruffaldi, E, Frisoli, A|
|Publisher||Springer International Publishing|
|Conference Location||Pisa, Italy|
Skin stretch, when mapped to joint position, provides haptic feedback using a mechanism similar to our sense of proprioception . Rocker-type skin stretch devices typically actuate in the lateral direction of the arm, though during limb movement stretch about joint angles is in the longitudinal direction. In this paper, human perceptual performance in a target-hitting task is compared for two orientations of the Rice Haptic Rocker. The longitudinal direction is expected to be more intuitive due to the biological similarities, creating a more effective form of haptic feedback. The rockers are placed on the upper arm, and convey the position of a cursor among five vertically aligned targets. The longitudinal orientation results in smaller errors compared to the lateral case. Additionally, the outer targets were reached with less error than the inner targets for the longitudinal rocker. This result suggests longitudinal stretch is more easily discerned than laterally oriented stretch.