FIGURE 2.

Example of subject responses and associated analysis. (A) The responses for trials without conflict (triangles) are linearly interpolated as describe in “Materials and Methods” section (colored lines). The area (vertical gray bars) between each interpolation line and the line joining the targets (squares) is used to compute accuracy, Acc. The angle between the interpolation lines and the targets line is used quantify the distortion, Dist, of the responses. The intersections between the vertical axis and the lined interpolating the responses after left and right neck flexion (q_hl, q_hr) are used to quantify the response bias induced by the head roll (Aubert-Müller effect, AMe). (B) For the trials with conflict, that is, rotation of the visual scene, the responses after left and right flexion of the neck are interpolated separately (see “Materials and Methods” section) and represented by dotted, colored lines. To estimate the relative importance given to the visual information, the vertical distance between the lines interpolating the response with and without conflict, Δq_r,hl and Δq_r,hr, is computed and compared to the theoretical deviation of the targets, if they assumed to move together with the visual scene, Δq_t,hl and Δq_t,hr.