Sentis, “an international company focused on achieving operational excellence,” released a series of videos a couple of years ago about how the brain processes information, learns, and functions.  The seven short videos in the playlist are quick and enjoyable.
As the human brain drives all the behaviors that we can observe, spending the time to truly understand how the brain processes information and drives our responses provides the context to interpret the nonverbal cues we are searching for in our pursuit to recognize violent attackers before the event begins.