Figure 3.

Task goals encoded by the IME probabilistic model. For illustration, we consider a two-timestep visual feedback delay. At timestep t, the subject’s internal estimate of the cursor position two timesteps ago matches the actual cursor position (black point). The subject’s internal state estimates (red points) evolve according to (11). If the subject intends to drive the cursor straight to the target position, G_t (green point), from the subject’s estimate, ${\mathbf{x}}_{\mathrm{t}}^{\mathrm{t}}$, of the current cursor position, then according to (12), the target should lie near the line defined by the two points, ${\mathbf{x}}_{\mathrm{t}}^{\mathrm{t}}$ and ${\mathbf{x}}_{\mathrm{t}+1}^{\mathrm{t}}$ (dashed red line).