J. R. Williamson, T. F. Quatieri, B. S. Helfer, R. L. HORWITZ, B. Yu, and D. D. Mehta, “Vocal and facial biomarkers of depression based on motor incoordination,” Third International Audio/Visual Emotion Challenge (AVEC 2013), 21st ACM International Conference on Multimedia. pp. 1-4, 2013.