@article{Calinon07IS, author="S. Calinon and A. Billard", title="What is the Teacher's Role in Robot Programming by Demonstration? - {T}oward Benchmarks for Improved Learning", journal="Interaction Studies. {S}pecial Issue on Psychological Benchmarks in Human-Robot Interaction", editor="K. Dautenhahn", year="2007", volume="8", number="3" pages="441-464" }