Perceptual and Motor Skills · 1988 · 147 citations · 8 references
EducationKinesiologyPsychologyExperimental PsychologyMotor ControlMotor LearningFeedback In Motor LearningKnowledge Of ResultsMotor Skill AcquisitionMovement VariabilitySkill AcquisitionTransfer Of LearningAcquisition PhaseControl Group DesignFeedbackFeedback In Skill LearningMatched Control GroupMovement ConsistencyPractice TrialsWithin-subject Variance
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.
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