1. A see through head mounted display apparatus, comprising: a see-through, head mounted display; a plurality of sensors cooperating with the display to detect audible and visual behaviors of a subject in a field of view of the apparatus; one or more processing devices in communication with display and the sensors, the one or more processing devices automatically monitor the audible and visual behaviors of the subject by receiving data from the sensors; compute an emotional state of the subjects based on the audible and visual behaviors; provide feedback to the display indicating computed emotional states of the subject.