Sherwood D E
Department of Kinesiology, University of Colorado, Boulder 80309-0354.
Percept Mot Skills. 1988 Apr;66(2):535-42. doi: 10.2466/pms.1988.66.2.535.
The effect of "bandwidth" knowledge of results (KR), given only if the subject's response is outside of a certain movement-time bandwidth, on learning and performance of a rapid elbow-flexion movement was examined. Subjects were randomly assigned to one of three feedback groups, a 5% bandwidth group (BW5), a 10% bandwidth group (BW10), or a control group (KR), who received knowledge of results on every trial. Subjects moved a light, horizontal, aluminum lever through 60 degrees in 200 msec., for 100 acquisition trials with KR given depending on group and 25 transfer trials without KR (transfer phase). Although the subjects in the BW10 group received knowledge of results fewer times during acquisition, they showed less within-subject variability than the BW5 and KR groups on the transfer test which suggests that giving KR about a relatively large bandwidth enhances movement consistency.
研究了仅在受试者的反应超出特定运动时间带宽时给出的“带宽”结果知识（KR）对快速屈肘运动学习和表现的影响。受试者被随机分配到三个反馈组之一：5%带宽组（BW5）、10%带宽组（BW10）或对照组（KR），对照组在每次试验中都接受结果知识。受试者在200毫秒内将一个轻质水平铝制杠杆移动60度，进行100次习得试验，根据组别给予KR，并进行25次无KR的迁移试验（迁移阶段）。尽管BW10组的受试者在习得过程中接受结果知识的次数较少，但在迁移测试中，他们的受试者内变异性比BW5组和KR组小，这表明给出关于相对较大带宽的KR可提高运动一致性。
