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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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Ph.D. Dissertation Defense Announcement
Title: Timing Multimodal Turn-Taking in Human-Robot Cooperative Activity
Crystal Chao
Robotics Ph.D. candidate
School of Interactive Computing
Date: Thursday, March 12, 2015
Time: 10:00 am - 12:00 pm
Location: Marcus Nanotechnology Bldg., Room 1117-1118
Committee:
Dr. Andrea L. Thomaz (Advisor), School of Interactive Computing
Dr. Ronald C. Arkin, School of Interactive Computing
Dr. Henrik I. Christensen, School of Interactive Computing
Dr. Karen M. Feigh, School of Aerospace Engineering
Dr. Candace L. Sidner, Department of Computer Science, Worcester Polytechnic Institute
Abstract:
Turn-taking is a fundamental process that governs social interaction. When humans interact, they naturally take initiative and relinquish control to each other using verbal and nonverbal behavior in a coordinated manner. In contrast, existing approaches for controlling a robot's social behavior do not explicitly model turn-taking, resulting in interaction breakdowns in which the human is uncertain about when to act. They also lack generality, relying on scripted behavior control that must be designed for each new domain.
This thesis seeks to enable robots to cooperate fluently with humans by automatically controlling the timing of multimodal turn-taking. Based on our empirical studies of interaction phenomena, we develop a computational turn-taking model that accounts for multimodal information flow and resource usage in interaction. This model is implemented within a novel behavior generation architecture called CADENCE, the Control Architecture for the Dynamics of Embodied Natural Coordination and Engagement, that controls a robot's speech, gesture, gaze, and manipulation. CADENCE controls turn-taking using a timed Petri net (TPN) representation that integrates resource exchange, interruptible modality execution, and modeling of the human user. We demonstrate progressive developments of CADENCE through multiple domains of autonomous interaction encompassing situated dialogue and collaborative manipulation. We also iteratively evaluate improvements in the system using quantitative metrics of task success, fluency, and balance of control.
