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(Left) the scene in camera 1, C: child, T: therapist; (center) the scene in camera 3, C: child, T: therapist; (right) the experiment setup, C: child, T: therapist. At the very beginning of session, child and therapist sit in front of desk for around 10 min to relax before child was exposed to the robot. CAM 1 records only face and upper body of the participants. CAM 2 is used for recognizing the facial expressions. CAM 3 records the whole scene of session for reference.
