Eve Ekman University of California Television (UCTV) Dr. It is used to observe and describe all facial movement. FACS is used to measure facial expression by encoding how movements of facial muscles result in changes in the appearance of the face (Ekman & Friesen, 1978 Hamm, Kohler, Gur & Verma, 2011).įACS, short for Facial Action Coding System, is a research tool useful for measuring any facial expression a human being can make. In 1978, Paul Ekman, along with Wallace Friesen developed the Facial Action Coding System (FACS) a system used to measure all visually distinguishable facial movements (Ekman & Friesen, 1978). What is FACS? The Facial Action Coding System (FACS), first developed by Paul Ekman and Wallace Friesen in 1978 and revised by Ekman, Friesen, & Hager in 2002, is a comprehensive, anatomically-based system for coding all observable facial behavior.
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