FIGURE 2.

Three-dimensional scatter plot of mean difference scores between the Affectiva scores for smile and brow furrow and the scores for “joy” and “anger” during the EMG condition, as well as the EMG amplitudes for zygomaticus mayor and corrugator supercilii activity. Note that the difference score is computed to be more negative (closer to –1) if the respective measure indicates a more negative (i.e., angry) expression and more positive (closer to 1) if the measure indicated a positive (i.e., happy) expression. Red dots indicate the difference scores in the angry condition, green dots in the happy condition and blue dots in the neutral condition.