13. The system of claim 9 wherein comparing the recorded non-verbal behavior to a predefined behavioral model further includes: calculating a gaze position history of the first participant by analyzing behavior of the first participant in previous segments of the input video.
13. The system of claim 9 wherein comparing the recorded non-verbal behavior to a predefined behavioral model further includes: calculating a gaze position history of the first participant by analyzing behavior of the first participant in previous segments of the input video. 14. The system of claim 13 wherein comparing the recorded non-verbal behavior to a predefined behavioral model further includes: estimating likely future behavior of the first participant based on the behavior of the first participant in previous segments of the input video.