CONF Oertel_ICMI_2016/IDIAP Towards building an attentive artificial listener: on the perception of attentiveness in audio-visual feedback tokens Oertel, Catharine Lopes, José David Yu, Yu Funes Mora, Kenneth Alberto Gustafson, Joakim Black, Alan Odobez, Jean-Marc backchannels head nods virtual agents Proceedings of the 18th ACM International Conference on Multimodal Interaction Tokyo, Japan 2016 ACM 21-28 978-1-4503-4556-9 10.1145/2993148.2993188 doi