Fig. 1

Representation of the BBT-VR (Oculus Quest). A The picture shows the virtual environment seen by the participant headset. It consisted of the BBT-VR, the virtual hands (which corresponded to the controllers) and the indication of the time, the score, the number of collisions with the virtual separation and the number of cubes out. B The picture represents a participant performing the BBT-VR with his right hand. C The picture shows the controller hold by a right hand. Three buttons are presented: one next to the thumb, one next to the index and one next to the middle-finger. D Representation of the recommended position to grab the virtual blocks in virtual reality