@INPROCEEDINGS{dondrup2014hesitation,
  author = {Dondrup, Christian and Lichtenth{\"a}ler, Christina and Hanheide,
Marc},
  title = {Hesitation signals in human-robot head-on encounters: a pilot study},
  booktitle = {Proceedings of the 2014 ACM/IEEE international conference on Human-robot
interaction},
  year = {2014},
  pages = {154--155},
  organization = {ACM},
  abstract = {We present a pilot study to find hesitation signals in Human- Robot
Spatial Interaction which we aim to employ to evaluate the quality
of the robots executed behaviour. The presented study focuses on
head-on encounters between a human and a robot in pass-by scenarios.
Our results show that these hesitation signals can be found and therefore
present a form a implicit feedback.}
}