5_Unit1.5_Feedback copy

like pit stains effects of activity in the post kr

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Unformatted text preview: d) Post KR delay of 5-60 seconds appears to be beneficial 6 7/4/12 other distractions hinder learning.-----like pit STAINS. Effects of activity in the post-KR interval Similar to the KR delay interval, most activities have no effect here, but: Other cognitive activity hinders learning (e.g., math problems, behavioral distractions, etc.) Whoa.. ! nasty breath!!! Frequency of Augmented Feedback How often should feedback be provided? Previous thinking was that it should be given on every trial – since performance suffered on trials without KR Now we know that 100% of the time is NOT optimal Why?? The Guidance Hypothesis (Winstein & Schmidt, 1990) if you give toomuch feedback too often--you can hinder learning!!!!!. Fading schedules of feedback •  Decreases frequency of feedback through practice to wean learner from dependency Pattern matching with lever Winstein & Schmidt (1990) •  No differences in acquisition – but fading schedule is better in retention 7 7/4/12 Bandwidths in augmented feedback •  A bandwidth is a range or tolerance limit of performance •  For feedback: How great the amount of error should be before feedback is given. •  Bandwidth feedback is feedback given within a predefined range of error. Bandwidths in augmented feedback feedback was givin based on how well you did. if you fucked up you got more feedback…. Task: Match a criterion 200 ms elbow flexion movement Groups: 0% bandwidth (feedback every trial) 5% bandwidth (feedback only if error >5%) 10% bandwidth (feedback only if error >10%) when you got feedback based on how much you fucked up your performance improved. Larger bandwidths may be better, and the bandwidths do not necessarily need to decrease as learning progresses Sherwood (1988) Summary Feedback Lever movement to criterion time KR after: 1) every trial (sum 1) 2) every 5 trials (sum 5) 3) every 10 trials (sum 10) 4) every 15 trials (sum 15) Schmidt et al. (1989) 8 7/4/12 Ways to reduce frequency of feedback" 1. Performance-based bandwidths 2. Self-selected frequency •  akin to asking for help when needed •  encourages active participation 3. Summary feedback •  feedback is given after certain number of trials •  gives overall knowledge of progress, but diminishes dependency on feedback as information lacks specificity 9...
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This document was uploaded on 03/28/2014 for the course KNES 385 at Maryland.

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