Table 5: Percentage of change of features from period to in the Tetris game ().

Feature (notation) MeanMin.Max.

Mouth outer ()−1.5−27.839.0
Mouth corner ()−2.1−26.526.9

Eye area ()−2.6−19.026.1
Eyebrow activity ()−3.3−16.221.1

Face area ()−1.4−24.326.7
Face motion ()−11.3−85.8114.3
Facial COM ()−2.7−24.721.8