HAYMAN-WOODWARD

Facial Action Coding System (FACS) is a system to taxonomize human facial expressions, originally developed by Paul Ekman and Wallace Friesen in 1976.
It is a common standard to systematically categorize the physical expression of emotions, and it has proven useful to psychologists and behavioral scientists to determine one's true reaction during a interpersonal exchange or situation.
A microexpression is a brief, involuntary facial expression shown on the face of humans when one is trying to conceal or repress an emotion. They usually occur in high stakes situations, where people have something to lose or gain. Unlike regular facial expressions, few can fake a microexpression (it is possible to voluntarily stress some facial muscles to replicate micro-expressions).
They consist of and completely resemble the seven universal emotions: disgust, anger, fear, sadness, happiness, surprise, and contempt.
Microexpressions can occur as fast as 1/25 of a second.
Having mastered this technique, we train Law Enforcement officials with the interpretation of microexpressions of subjects while being interviewed in detention centers, at ports of entries to determine one's truthfulness while making statements to immigration and customs officials during the admission process, or even by State Department Consular Officers during interviews for visa applications.

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