Fig. 1.

(A) Examples of images with 1) no facial actions coded, 2) mouth opening, 3) smiling and eye constriction, and 4) mouth opening, eye constriction, and brow lowering. (B) Percent of expressions from negative and positive situations involving 0, 1, 2, 3, or 4 coded facial actions. For example, the face shown in A1 would correspond to a coding of “0” because none of the action units are activated. By contrast, the face shown in A4 would correspond to a coding of “3” because three of the action units are activated. Images A1-3 reproduced with permission from Getty Images - Image Bank Israel. Image A4 reproduced with permission from Reuters – A|S|A|P creative, Israel.