Miroslav SiliJan BobethEmanuel SandnerSten HankeStephanie SchwarzChristopher C. MayerTalking Faces in Lab and Field Trials - A View on Evaluation Settings and User Involvement Results of Avatar Based User Interaction Techniques in Three Ambient Assisted Living Projects.134-1442015HCI (25)https://doi.org/10.1007/978-3-319-20892-3_14conf/hci/2015-25db/conf/hci/hci2015-25.html#SiliBSHSM15