Head movement: Summary statistics of angular velocities (in DEG/s).

Pitch, yaw, and roll velocity of each trial video sequence were summarized by their respective mean value and mean of magnitude. For each dataset (BioVid, UNBC, and BP4D) and statistic (columns) we report mean and standard deviation, M (SD), of pain and control trials as well as the p-value of the respective analysis of variance (rows). Significant differences are highlighted in bold.