Three groups were engaged in one of three types of activity interpolated between two sessions of massed practice on the pursuit rotor. The interpolated tasks were visual pursuit reaction time, blindfolded rotary arm movement, and rest. The interpolated tasks were selected to determine whether the recovery from temporary work decrement could be blocked by continued visual or motor activity. Since all groups recovered equally from work decrement, it was concluded that the locus can not be in the peripheral motor or visual systems.
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