Table 3.

Content validity results

Item	BBT-VR-C	BBT-VR-HT	MD-MR
Opening the hand when picking up the cube	1 [0–2]	0 [0–1.5]	0 [0–1]
Closing the hand when gripping the cube	0 [-0.5–2]	1 [0–1.5]	0 [0–0.5]
Maintaining the grip throughout the movement	0 [-1–1]	0 [-0.5–1]	0 [0–0]
Arm movement to displace the cube	1 [0–1]	0 [0–0]	1 [0–2]
Opening of the hand to release cube	1 [0–2]	0 [0–1.5]	0 [0–1.5]
Tactile feedback	2 [1–2]	2 [1–2]	0 [0–0.5]

Content validity data. Range for each item goes from − 2, meaning the task is much easier to do with the concerned test than with traditional BBT, to + 2, meaning the task is much more difficult to do with the concerned test than with traditional BBT.