FIGURE 2.

Time-series of a representative trial. (A) Both participants’ positions are plotted, as well as the positions of the objects which they could encounter with (shadow objects and static objects). In this example an interactive turn-taking of movements is taking place, and a jointly drifting through the virtual space is conspicuous. (B) The instantaneous velocities (derivative of the players’ positions) are shown for both participants of the dyad. Notice that all the values oscillate around zero, meaning that there is no trend in this new time-series.