A book on the "Mechanism" of these things was based on experiments that demonstrated their physical basis by using (*) electrical probes.
Recognition of these tangible things was famously tested among the Fore people using the POFA set. Joseph C. Hager helped develop a taxonomy of these things, their namesake "coding system." Maureen O'Sullivan was part of the "Wizards Project," which sought to identify people who are particularly good at gaining information from these tangible things. Wallace Friesen coauthored several studies that attempted to debunk the cultural specificity of these tangible things. A book on the "Mechanism" of these things was based on experiments that demonstrated their physical basis by using (*) electrical probes. Photographs of Duchenne de Boulogne's work with these things inspired Charles Darwin's last major book. Six of these tangible things are "universally recognized," according to Paul Ekman, as manifesting anger, disgust, fear, happiness, sadness, and surprise. For 10 points, the Silent Talker Lie Detector uses what muscular movements' "micro" variety?
Recognition of these tangible things was famously tested among the Fore people using the POFA set.
facial expressions [or facial affects; accept microexpressions; accept any answer involving faces; accept The Mechanism of Human Facial Expression; accept The Expression of the Emotions in Man and Animals; prompt on "reactions," "body language," etc.] 