This book constitutes the thoroughly refereed post-workshop proceedings of the First IAPR TC3
Workshop on Pattern Recognition of Social Signals in Human-Computer-Interaction (MPRSS2012)
held in Tsukuba Japan in November 2012 in collaboration with the NLGD Festival of Games. The
21 revised papers presented during the workshop cover topics on facial expression recognition
audiovisual emotion recognition multimodal Information fusion architectures learning from
unlabeled and partially labeled data learning of time series companion technologies and
robotics.