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HFES 2008 Proceedings Presentation

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HFES 2008 Proceedings Presentation

  1. 1. How Individual Differences and Task Load May Affect Feedback Use When Learning a New Task<br />Christopher M. Kelley & Anne Collins McLaughlin<br />North Carolina State University<br />September 26, 2008<br />
  2. 2. Some Definitions<br />Feedback - Information from an external source about performance meant to guide learning<br />(Kluger & DeNsi, 1996). <br />Performance vs. Learning measures<br />(Brosvic, Dihoff, Epstein, & Cook, 2006; McLaughlin, 2007; Salmoni, Schmidt, & Walter, 1984; Schmidt & Bjork, 1992) <br />Feedback support<br />(McLaughlin, 2007)<br />
  3. 3. Conceptual Directive<br />Rare Every Trial<br />Lengthy Delay Immediate<br />SUPPORT<br /> Low High<br />Introduction to Feedback Parameters<br />Content<br /> information contained in feedback (FB)<br />Frequency<br /> absolute or relative; generally # of trials receiving FB<br />Timing<br />amount of delay between precipitating action and FB<br />
  4. 4. Conflicting Models<br />Effects of Feedback Support<br />Less Feedback Support<br />More Feedback Support<br /><ul><li>Increases attention & motivation
  5. 5. Feedback support becomes a crutch
  6. 6. Increases exploration
  7. 7. Feedback used to free up cognitive resources</li></li></ul><li>Research Results<br />Feedback Present<br />No Feedback<br />Acquisition<br />Retention<br />Feedback/Support<br />Condition<br />Results<br />Results<br />Mixed<br />Increased performance<br />High<br />Mixed<br />Decreased performance<br />Low<br />Cog. Resources<br />Task Demand<br />
  8. 8. The Role of Cognitive Resources<br />
  9. 9. A Measure of Cognitive Resources<br />Working memory capacity is the amount of attentional processes available to an individual as well as the ability to focus and allocate these processes <br />((Engle, Kane & Tuholski, 1999 ).<br />
  10. 10. Present Study<br />Control for cognitive resources<br />Control for task demand<br />
  11. 11. Method<br />Purpose: To investigate the relationship between cognitive resources, task demand and the feedback required to learn a cognitive task<br />Participants<br />Younger Adults <br />Task<br />Simple & complex version<br />Feedback<br />Summary<br />High<br />Design<br />Between Participants<br />Independent Variables<br />Feedback Support<br />Task Demand<br />Age (quasi)<br />Dependent variables<br />Performance in<br />Acquisition<br />Retention<br />
  12. 12. Procedure<br />3 days<br />Complete ability tests<br />Acquisition<br />(18 trials)<br />Retention<br />(12 trials)<br />Feedback<br />No Feedback<br />Retention Test<br />More<br />Less<br />
  13. 13. The Task: Furniture Factory<br />Decisions<br />Results<br />Employee 1<br />Job<br />Goal<br />Performance<br />Feedback<br />Reward<br />Was it fair?<br />Employee 2<br />Job<br />Goal<br />Performance<br />Feedback<br />Reward<br />
  14. 14. Pilot Study<br />Participants<br />8 low WMC and 12 high WMC<br />2 (Feedback specificity: low, high) × 2 (WMC: low, high)× 3 (Exploration strategy: systematic, unsystematic) factorial <br />
  15. 15. Acquisition Results <br />Main effect of FB<br />
  16. 16. Retention Results<br />Participants in high FB specificity demonstrated more learning, although results did not reach significance<br />
  17. 17. Retention Results Con’t<br />High FB, High WMC > Low FB, High WMC<br />
  18. 18. Retention Results Con’t<br />Regression analysis indicates WMC, exploration strategy and acquisition performance significantly predict retention test performance<br />
  19. 19. Application<br />Results of full study used to develop guidelines for individual training<br />Develop more effective feedback prescriptions<br />Creating a better match between individual characters and requirements for learning a new cognitive task<br />
  20. 20. Acknowledgements<br />The Learning, Aging, and Cognitive Ergonomics Lab at NC State University www.lacelab.org<br />

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