
284 Coverbal Synchrony in Human-Machine Interaction
where m
i
is the mass of the i-th user’s body segment (e.g., head,
right/left shoulder, right/left elbow and so on) and v
i
is the velocityof the
i-th segment, computed as the difference in the position of the segment
at the current Kinect frame and the position at the previous frame.
3.1.3 Mid-level features: Impulsivity index
Impulsive body movements are those performed quickly, with a high
energy and by suddenly moving spine/limbs in a straight direction.
We adopt this definition after reviewing some literature about human
movement analysis and synthesis. Wilson et al. (1996) fo ...