Fig. 1.

Images of experimental stimulus as seen from the perspective of one of the two participants. The ball, net, and table were visible in all viewing conditions. Panel a–c shows the three different viewing conditions in Experiment 1 and 2 from the perspective of one of the two participants. Eight experimental conditions were derived from a combination of these different viewing conditions for each participant of a pair. Panel d shows the experimental stimulus in the ‘dark room’ condition of the pilot study