Training in picking up nonverbal cues includes reading patients’ emotions from their tone of voice, their posture, and, to a large extent, their facial expression. Using the work of emotions expert Paul Ekman, who has identified with precision how the facial muscles move during every major emotion, the program teaches doctors how to recognize patients’ fleeting feelings from reading their faces.
— Focus: The Hidden Driver of Excellence (Daniel Goleman), Loc. 1543–5