Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis?...

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Feedback From bandwidths onwards

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Transcript of Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis?...

Page 1: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Feedback

From bandwidths onwards

Page 2: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

First, the guidance hypothesis

• Remember the guidance hypothesis? Usually examined with simple button tasks Some others have tried different tasks now...

Page 3: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Guidance and bimanual coordination

• Task layout...

Page 4: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Guidance and bimanual coordination

• Feedback types...

Page 5: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Guidance and bimanual coordination

• Results... Guidance hypothesis supported Also, specificity of practice

supported for continuous but not discrete feedback.

Feedback goodFeedback goodFeedback bad!

Page 6: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Guidance and driving

• A far cry from a button and a barrier...

Page 7: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Guidance and driving

• Task...

Feedback bad!

Page 8: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Guidance and driving

• Measures...

Feedback bad!

Page 9: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Guidance and driving

• Results...

Feedback goodFeedback no good

Seems to suggest maladaptive short term

corrections

Page 10: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Bandwidths and driving

• Similar task, but with some problems fixed

Page 11: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Bandwidths and driving

• Similar task, but with some problems fixed• Now use a simulator, rather than the “real thing”

Page 12: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Bandwidths and driving

• Groups:

Basically, the feedback used is now vibrations of the car seat, applied either when within or

outside of a fixed distance from the center lane

There are also a control group and a “realistic” group

Page 13: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Bandwidths and driving

• Results: Seems conventional BW feedback works quite well.

Page 14: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Relationship to bandwidth feedback Providing guidance when thought to be most effective

• Chiviacowsky and Wulf (2005) Manipulation:

Choose whether you got feedback on a trial Some choose before the trial, some choose after What difference would this make?

Page 15: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky and Wulf (2005) Task:

Can err in proportions and/or in absolute times

Page 16: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky and Wulf (2005) Results – performance quality

Main differences in transfer

Page 17: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky and Wulf (2005) Results – when do they choose to receive feedback?

Seems feedback is chosen after “good” trials

Page 18: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky and Wulf (2007)

Page 19: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky and Wulf (2007) Manipulation: receive feedback after good or poor trials Task: beanbag toss to target, 60 trials practice, 10 trials

test Feedback: (e.g.) -90, +70

Page 20: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky and Wulf (2007) Results - accuracy

Page 21: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky et al. (2008)

Page 22: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky et al. (2008) task

Page 23: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky et al. (2008) results

significantNot significant

Page 24: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky et al. (2008ii) More KR vs. less KR Same task as C et al 2008.

All participants do 60 trials Form groups after practice – based on proportion of feedback

requested. Who retains the task the best?

Page 25: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Self-controlled feedback

• Chiviacowsky et al. (2008ii) Results:

Basically a warning that some kids might not

request enough feedback – needs to be used with

education in mind!

Page 26: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Motivational factors – “good trials”

• All the focus on “good trials” gets folk thinking of motivational effects of feedback (rather than simple error correction...

Page 27: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Motivational factors – “good trials”

• Badami et al. (2011) Same manipulation as C & W (2007)

Page 28: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Motivational factors – “ability”

• Wulf & Lewthwaite (2009)

Some are told the task reflects an inherent ability, some that it is an acquirable skill

Page 29: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Motivational factors – “ability”

• Wulf & Lewthwaite (2009)

Page 30: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Motivational factors – “fake feedback”

• Wulf & Lewthwaite (2010)

Page 31: Feedback From bandwidths onwards. First, the guidance hypothesis Remember the guidance hypothesis? Usually examined with simple button tasks Some others.

Motivational factors – “fake feedback”

• Wulf & Lewthwaite (2010)


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