%0 Journal Article %1 Jaric:1992 %A Jaric, Slobodan %A Corcos, Daniel M %A Latash, Mark L %D 1992 %J Experimental Brain Research %K - Brain Distance Equilibrium-point Exp Human Location Motor Res Voluntary control hypothesis movement programming %P 129 -134 %T Effects of practice on final position reproduction %V 91 %X Three subjects practiced fast, accurate 36 ~ elbow flexion movements to a 2.5 ~ target for 14 sessions of 100 trials (total, 1400 trials). Subjects then returned for a 15th experimental session in which they were asked to perform 15 movements under identical conditions to the practice condition. They were then tested under three ex- perimental conditions without visual feedback: (1) iden- tical to the practice conditions, (2) with small shifts in starting position (+ 3 ~ of the practiced starting position), that were insufficient for subjective discrimination and, therefore, subjects were instructed to repeat the practiced movements; and (3) with a large shift in starting position (range, • 15 ~ of the practiced starting position), under the instruction to move to the same target. Experimental conditions 2 and 3 demonstrated that shifts in starting position were partially correlated with shifts in final posi- tion. These results are interpreted from the point of view of the equilibrium-point hypothesis of motor control.

@article{Jaric:1992, abstract = {Three subjects practiced fast, accurate 36 ~ elbow flexion movements to a 2.5 ~ target for 14 sessions of 100 trials (total, 1400 trials). Subjects then returned for a 15th experimental session in which they were asked to perform 15 movements under identical conditions to the practice condition. They were then tested under three ex- perimental conditions without visual feedback: (1) iden- tical to the practice conditions, (2) with small shifts in starting position (+ 3 ~ of the practiced starting position), that were insufficient for subjective discrimination and, therefore, subjects were instructed to repeat the practiced movements; and (3) with a large shift in starting position (range, • 15 ~ of the practiced starting position), under the instruction to move to the same target. Experimental conditions 2 and 3 demonstrated that shifts in starting position were partially correlated with shifts in final posi- tion. These results are interpreted from the point of view of the equilibrium-point hypothesis of motor control. }, added-at = {2009-06-26T15:25:19.000+0200}, author = {Jaric, Slobodan and Corcos, Daniel M and Latash, Mark L}, biburl = {https://www.bibsonomy.org/bibtex/27b2f14fc50d79952eedb56f193462543/butz}, description = {diverse cognitive systems bib}, interhash = {9ff81124b71ae5d160670856b073d4ca}, intrahash = {7b2f14fc50d79952eedb56f193462543}, journal = {Experimental Brain Research}, keywords = {- Brain Distance Equilibrium-point Exp Human Location Motor Res Voluntary control hypothesis movement programming}, owner = {martin}, pages = {129 -134}, review = {3 Ss trained elbow flexion movements for 1400 trials to the same target. Three tests were performed: 1.) Same as training 2.) undetectable elbow displacement before movement 3.) detectable elbow displacement before movement. Goal: decide between movement to endpoint or movement over a distance programming. Endpoint: no influence of displacement on endpoint -> high correlation between displacement and movement distance Distance: no influence of displacement on movement distance-> high correlation between displacement and end point. Mixed result, however: correlation with distance seems higher than correlation with endpoint -> rather endpoint control.}, timestamp = {2009-06-26T15:25:38.000+0200}, title = {Effects of practice on final position reproduction}, volume = 91, year = 1992 }