Listener head gestures and verbal feedback expressions in a distraction task

We report on the functional and timing relations between head movements and the overlapping verbal-vocal feedback expressions. We investigate the effect of a distraction task on head gesture behaviour and the co-occurring verbal feedback. The results show that head movements overlapping with verbal expressions in a distraction task differ in terms of several features from a default, non-perturbed conversational situations, e.g.: frequency and type of movement and verbal to nonverbal display ratios