Figure 2.
Catch trials are associated with increased stabilization of dynamic motor learning. A, Subjects given continuous or intermittent forces (i.e., 0 or 20% catch trials) in a clockwise epoch, but no subsequent interfering field, begin performing at better than naive levels at retest, according to the velocity vector correlation. B, Subjects given an interfering field only exhibited such retention if they had experienced the forces intermittently. C, Subjects experiencing intermittent forces internalized the clockwise and counterclockwise fields, as measured by an increase in the learning index (i.e., the relative magnitude of trajectory deviations accounted for by the catch trials). Lines, Mean ± SEM of trial bins.