Log people gaze
In particular, are they looking at the robot. See: http://doc.aldebaran.com/2-5/naoqi/peopleperception/algazeanalysis-api.html#algazeanalysis-api
In particular, are they looking at the robot. See: http://doc.aldebaran.com/2-5/naoqi/peopleperception/algazeanalysis-api.html#algazeanalysis-api