To Please in a Pod: Employing an Anthropomorphic Agent-Interlocutor to Enhance Trust and User Experience in an Autonomous, Self-Driving Vehicle

Recognising that one of the aims of conversation is to build, maintain and strengthen positive relationships with others, the study explores whether passengers in an autonomous vehicle display similar behaviour during transactions with an on-board conversational agent-interface; moreover, whether related attributes (e.g. trust) transcend to the vehicle itself. Employing a counterbalanced, within-subjects design, thirty-four participants were transported in a self-driving pod using an expansive testing arena. Participants undertook three journeys with an anthropomorphic agent-interlocutor (via Wizard-of-Oz), a voice-command interface, or a traditional touch-surface; each delivered equivalent task-related information. Results show that the agent-interlocutor was the most preferred interface, attracting the highest ratings of trust, and significantly enhancing the pleasure and sense of control over the journey experience, despite the inclusion of 'trust challenges' as part of the design. The findings can help support the design and development of in-vehicle agent-based voice interfaces to enhance trust and user experience in autonomous cars.