How Recommender Systems in
   Technology-Enhanced Learning
           depend on Context
Hendrik Drachsler        Nikos Man...
TEL context




          Figure by : Cross, J. (2006). Informal learning: Rediscovering the
          natural pathways th...
Formal learning
                                               • are learning offers from
                                ...
Formal learning = structured
                       layers




  Generic layers within a simplified architecture of an edu...
Informal learning
                                               • content is provide from different
                     ...
Informal learning = emergence




hendrik.drachsler@ou.nl
STELLAR - Alpine rendez-vous workshop on context-aware recommend...
Context variables
  Formal learning
       Curriculum (Closed-Corpus)
       Teacher directed
       Predefined learnin...
Recommendation approaches



      Learning settings, environmental conditions
      and the task greatly affect the desig...
Formal recommendation
                       approach
            Adaptive                                                ...
Informal recommendation
                     approach
             Hierarchical
                                          ...
Research question


 How can we get the best out of both worlds?




hendrik.drachsler@ou.nl
STELLAR - Alpine rendez-vous ...
A solution for formal learning




hendrik.drachsler@ou.nl
STELLAR - Alpine rendez-vous workshop on context-aware recommen...
A solution for informal learning




             • 100 user (hopefully some more after today )
             • 20000 Web ...
Version 1.0




hendrik.drachsler@ou.nl
STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmis...
Version 1.0

                                                          DUINE Prediction
                                  ...
How does it work?

      Cold-Start = Tag-based recommendation




               Collaborative Filtering with ratings


h...
Learner profile




hendrik.drachsler@ou.nl
STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Ga...
Conclusions

                                                                                        Fed by bottom-up
    ...
Future R&D




hendrik.drachsler@ou.nl
STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisc...
Many thanks for your interest!
   This slide is available here:
   http://www.slideshare.com/Drachsler

   Email:         ...
You can use it as well!
                      Please sign up at:
                          Register at                    ...
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How Recommender Systems in Technology-Enhanced Learning depend on Context

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How Recommender Systems in Technology-Enhanced Learning depend on Context

  1. 1. How Recommender Systems in Technology-Enhanced Learning depend on Context Hendrik Drachsler Nikos Manouselis Open University of the Greek Research Netherlands Technology Network
  2. 2. TEL context Figure by : Cross, J. (2006). Informal learning: Rediscovering the natural pathways that inspire innovation and performance. San Francisco, CA: Pfeiffer. hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 2 | November 30, 2009
  3. 3. Formal learning • are learning offers from educational institutions. • is imbedded into a curriculum or syllabus framework. Figure by: • is highly structured. Cross, J. (2006) • leads to a specific accreditation. • involves domain experts to guarantee quality. hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 3 | November 30, 2009
  4. 4. Formal learning = structured layers Generic layers within a simplified architecture of an educational AEH (Karampiperis & Sampson, 2005) hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 4 | November 30, 2009
  5. 5. Informal learning • content is provide from different sources. • happens outside formal educational settings (e.g. Figure by: related to work or leisure time. Cross, J. (2006) • is less structured (in terms of learning goals, study time or learning support). • does not lead to a certain hendrik.drachsler@ou.nl accreditation. STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 5 | November 30, 2009
  6. 6. Informal learning = emergence hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 6 | November 30, 2009
  7. 7. Context variables Formal learning  Curriculum (Closed-Corpus)  Teacher directed  Predefined learning resources, learning goals  Maintenance Informal learning  Learning resources from different providers (Open-Corpus)  More self-directed learning goals  Responsible for own learning pace / path  Lack of maintenance hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 7 | November 30, 2009
  8. 8. Recommendation approaches Learning settings, environmental conditions and the task greatly affect the design of recommender systems in TEL. systems in TEL. hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 8 | November 30, 2009
  9. 9. Formal recommendation approach Adaptive Learning Goal Layer Sequencing (top-down) Conceptual Layer Content Layer hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 9 | November 30, 2009
  10. 10. Informal recommendation approach Hierarchical Clustering Layer n clustering (bottom-up) Clustering Layer 1..n Content Layer hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 10 | November 30, 2009
  11. 11. Research question How can we get the best out of both worlds? hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 11 | November 30, 2009
  12. 12. A solution for formal learning hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 12 | November 30, 2009
  13. 13. A solution for informal learning • 100 user (hopefully some more after today ) • 20000 Web 2.0 items (increasing every hour) • 700 ratings in the data base • 10000 tags in the data base hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 13 | November 30, 2009
  14. 14. Version 1.0 hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 14 | November 30, 2009
  15. 15. Version 1.0 DUINE Prediction Engine Database User Interface of Items hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 15 | November 30, 2009
  16. 16. How does it work? Cold-Start = Tag-based recommendation Collaborative Filtering with ratings hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 16 | November 30, 2009
  17. 17. Learner profile hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 17 | November 30, 2009
  18. 18. Conclusions Fed by bottom-up approach How to combine? Fed by top-down approach hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 18 | November 30, 2009
  19. 19. Future R&D hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 19 | November 30, 2009
  20. 20. Many thanks for your interest! This slide is available here: http://www.slideshare.com/Drachsler Email: hendrik.drachsler@ou.nl Skype: celstec-hendrik.drachsler Blogging at: http://elgg.ou.nl/hdr/weblog Twittering at: http://twitter.com/HDrachsler hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 20 | November 30, 2009
  21. 21. You can use it as well! Please sign up at: Register at ReMashed remashed.ou.nl. starts mashing. http://remashed.ou.nl Enter your favorite Taste your Web 2.0 potatoes. personal flavor of Web 2.0. Join the community. hendrik.drachsler@ou.nl STELLAR - Alpine rendez-vous workshop on context-aware recommendation 2009, Garmisch-Partenkirchen, DE Page 21 | November 30, 2009

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