OpenWoZ: A Runtime-Configurable Wizard-of-Oz Framework for Human-Robot Interaction

Abstract

Wizard-of-Oz (WoZ) is a common technique enabling HRI researchers to explore aspects of interaction not yet backed by autonomous systems. A standardized, open, and flexi-ble WoZ framework could therefore serve the community and accelerate research both for the design of robotic systems and for their evaluation. This paper presents the definition of Open-WoZ, a Wizard-of-Oz framework for HRI, de-signed to be updated during operation by the researcher controlling the robot. OpenWoZ is implemented as a thin HTTP server run-ning on the robot, and a cloud-backed multi-platform client schema. The WoZ server ac-cepts representational state transfer (REST) requests from a number and variety of clients simultaneously. This “separation of con-cerns ” in OpenWoZ allows addition of com-mands, new sequencing of behaviors, and ad-justment of parameters, all during run-time.