Proceedings of the Annual Meeting of the Cognitive Science Society

This study investigated the delegation of tasks to a partner incooperation with a human partner and with an automation sys-tem as a system partner. In the experiment, a line-tracing taskwas used, in which the performance in the task of the partic-ipants and their partners was dynamically altered at multiplelevels. The participants were informed that their task partnerswere human (human condition) or automation system (systemcondition). However, in reality, all participants performed theirtask with an automation system. The results showed that a re-lationship between subjective trust in the partner and the per-centage of the task delegated to the partner was found only inthe system condition but not in the human condition. More-over, sensitivity to change in the task performance of the par-ticipants and their partners was higher, and the suitability oftask delegation was greater in the system condition than in thehuman condition. These results were discussed based on theprevious studies.