Fig. 1

Experimental setup. a Subject equipped with the four motion trackers and headset. Subject about to pick (b) and place (c) the bottle. Corresponding virtual arm, next to the layout of the two target sets in the virtual scene, from an egocentric (d) or side (e) point of view. The whole target set includes positions of all spheres (yellow and green), and the target subset includes only the positions of green spheres. The five possible target orientations are shown on the top row