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Error reduction that can be attributed to global (re-aiming) or local (re-tuning) adaptation mechanisms. The error reduction is calculated as the difference between the error in the no-compensation case and the error with only re-aiming (ra) or only re-tuning (rt) allowed. The percentage of the total error accounted for by each method is given above each bar. Experiments are arranged according to the extent of the rotational perturbation (Table 2).
