Figure 1.

Appropriate correction for both rotation and mirror-reversal perturbations. If the goal is to reduce error between the cursor and the target, the adaptive correction, denoted by the blue arrow, is counterclockwise for the rotation-based correction but clockwise for the mirror-based correction. Prior evidence supports the implicit process being appropriate for the rotation but not for the mirror. This has been used as evidence that visuomotor rotation tasks reveal adaptation of an established skill (reaching), while mirror-reversal tasks reveal a de novo skill that does not benefit from adaptation.