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; and 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; and provide feedback to the display indicating computed emotional states of the subject.