Head posture: Summary statistics of orientation angles (in DEG).

Pitch, yaw, and roll angles of each trial video sequence were summarized by their respective mean and range. 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.