Table 2: Mean of differences (SD) of features between periods and (). Units expressed in normalized pixels.

Feature (notation)

Mouth outer ()−20.59 57.36
Mouth corner ()−3.90 10.16

Eye area ()−0.019 0.064
Eyebrow activity ()−15.59 49.71

Face area ()−2.60 7.90
Face motion ()−44.97 326.74
Facial COM ()−0.029 0.113

; .