Mean Error (ME) and Variance (Var) according to conditions and modality of response.

V = Visual modality of response, H = Haptic modality of response, VH obs = Visuo-haptic modality of response, VH MLE = predicted Visuo-haptic estimate calculated with MLE, VH WTA = predicted Visuo-haptic estimate calculated with WTA, VH UWM = predicted Visuo-haptic estimate calculated with unweighted mean, F−18 = Frame tilted at 18° to the left, WF = cylinder-shape optical tunnel, F+18 = Frame tilted at 18° to the right, CM−9 = deviation of the head centre of mass at 9° to the left right, CM0 = no deviation of the head centre of mass, CM+9 = deviation of the head centre of mass at 9° to the right.