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The History of the Facial Action Coding System (FACS)
In my cross-cultural studies researching display rules, I developed and published a tool for measuring facial movements, the Facial Affect Scoring Technique (FAST). A year after it was published, an anthropologist, Wade Seaford, showed me a facial movement on his own face that was not included in FAST. I was devastated by Wade’s demonstration, not knowing how much else, how many other facial movements we had missed in creating FAST.