Facial action coding system pdf


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The Facial Action Coding System FACS is a widely used protocol for recognizing and labeling facial expression by describing the movement of muscles of the face. FACS is used to objectively measure the frequency and intensity of facial expressions without assigning any emotional meaning to those muscle movements. Instead, FACS breaks down facial expressions into their smallest discernable movements called action units.

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Facial Action Coding System (FACS) – A Visual Guidebook

It is the most widely used and versatile method for measuring and describing facial behaviors. Paul Ekman and W. Friesen developed the original FACS in the s by determining how the contraction of each facial muscle singly and in combination with other muscles changes the appearance of the face. They examined videotapes of facial behavior to identify the specific changes that occurred with muscular contractions and how best to differentiate one from another.

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Facial Action Coding System: Manual

Wallace V. Friesen, Ph. Joseph C.

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It illustrates appearance changes of the face using written descriptions, still images, and digital video examples. Working through the exercise of the FACS Manual may also enable greater awareness of and sensitivity to subtle facial behaviors that could be useful for psychotherapists, interviewers, and other practitioners who must penetrate deeply into interpersonal communications. FACS is a training manual, not necessarily easy reading, with lessons for detecting, performing, and categorizing facial movements.