Robotics Lab member Munjal Desai will be presenting his accepted full paper at HRI 2012: 7th ACM/IEEE International Conference on Human-Robot Interaction in Boston, MA. Munjal will be presenting this work on Tuesday, March 6, 2012.
Effects of Changing Reliability on Trust of Robot Systems
Munjal Desai1, Mikhail Medvedev1, Marynel Vazquez2, Sean McSheehy1, Sofia Gadea-Omelchenko3, Christian Bruggeman2, Aaron Steinfeld2, Holly Yanco1
(1) University of Massachusetts Lowell, (2) Carnegie Mellon University, (3) University of Pittsburgh
Prior work in human-autonomy interaction has focused on plant systems that operate in highly structured environments. In contrast, many human-robot interaction (HRI) tasks are dynamic and unstructured, occurring in the open world. It is our belief that methods developed for the measurement and modeling of trust in traditional automation need alteration in order to be useful for HRI. Therefore, it is important to characterize the factors in HRI that influence trust. This study focused on the influence of changing autonomy reliability. Participants experienced a set of challenging robot handling scenarios that forced autonomy use and kept them focused on autonomy performance. The counterbalanced experiment included scenarios with different low reliability windows so that we could examine how drops in reliability altered trust and use of autonomy. Drops in reliability were shown to affect trust, the frequency and timing of autonomy mode switching, as well as participants’ self-assessments of performance. A regression analysis on a number of robot, personal, and scenario factors revealed that participants tie trust more strongly to their own actions rather than robot performance.