The is the foundational technical guide for the Facial Action Coding System (FACS) , a comprehensive, anatomically based protocol for measuring and describing all visually discernible facial movements. First published in 1978 by Paul Ekman and Wallace V. Friesen, it provides a standard taxonomy that breaks down complex facial expressions into individual components called Action Units (AUs) . Quick Facts
Paul Ekman , Wallace V. Friesen , and Joseph C. Hager (for the 2002 revision). Original Publication: 1978; significantly updated in 2002. Facial Action Coding System. The Manual
To provide an objective, descriptive analysis of facial behavior without making initial emotional inferences. Core Methodology Facial Action Coding System - Paul Ekman Group The is the foundational technical guide for the
Over 500 pages (some digital editions exceed 1,000 pages). Wallace V. Friesen