1. Core Methods in Educational Data Mining HUDK4050 Fall 2014

2. Assignment C3

3. Who here used principal component analysis?

4. Assignment C3 Who here used principal component analysis? One person come up here and explain your solution – How did you do it? – What tool did you use? – What was your final result?

5. Did anyone else Use the same method Get a different answer What was your answer? What did you do differently?

6. Assignment C3 Who here used a different type of factor analysis? (Not including LFA) One person come up here and explain your solution – How did you do it? – What tool did you use? – What was your final result?

7. Did anyone else Use another factor analysis method Get a different answer What was your answer? What did you do differently?

8. Assignment C3 Who here used Learning Factors Analysis? One person come up here and explain your solution – How did you do it? – What tool did you use? – What was your final result?

9. Did anyone else Use the same method Get a different answer What was your answer? What did you do differently?

10. Assignment C3 Who here used Barnes’s Q-Matrix method? One person come up here and explain your solution – How did you do it? – What tool did you use? – What was your final result?

11. Did anyone else Use the same method Get a different answer What was your answer? What did you do differently?

12. Assignment C3 Who here used Knowledge Spaces or Partial Order Knowledge Spaces? One person come up here and explain your solution – How did you do it? – What tool did you use? – What was your final result?

13. Did anyone else Use the same method Get a different answer What was your answer? What did you do differently?

14. Assignment C3 Who here used Non-Native Matrix Factorization?

15. Assignment C3 Who here used Non-Native Matrix Factorization? Really?

16. Assignment C3 Who here used Non-Native Matrix Factorization? Really? How did you set it up?

17. Assignment C3 Did anyone use a different method than any of these? What did you use? How did it work?

18. The true answer…

19. Why… Did folks use the methods they used? Did folks not use the other methods?

20. Easy to use tools matter, right?

21. What are… The pluses and minuses of PCA for this problem?

22. What are… The pluses and minuses of other FA for this problem?

23. What are… The pluses and minuses of LFA for this problem?

24. What are… The pluses and minuses of Barnes’s method for this problem?

25. What are… The pluses and minuses of KS/POKS for this problem?

26. Any other questions or comments on the assignment?

27. What could I have changed about the assignment… That would have made LFA the obviously best approach to solving it?

28. What could I have changed about the assignment… That would have made KS/POKS the obviously best approach to solving it?

29. What are the relative benefits of using a q-matrix versus a knowledge space?

30. What are the consequences of getting a knowledge mapping wrong?

31. What are the relative advantages of Automatic model discovery Hand-development and refinement Hybrid approaches

32. What does a spike in a learning curve mean? (Distinct from MBMLM)

34. What is the trade-off Between Knowledge Spaces And Bayes Nets ?

35. Other questions or comments?

36. Assignment B5 Social Network Analysis

37. Next Class Wednesday, November 5 No assignment due Baker, R.S. (2014) Big Data and Education. Ch. 5, V5. Haythornthwaite, C. (2001) Exploring Multiplexity: Social Network Structures in a Computer-Supported Distance Learning Class. The Information Society: An International Journal, 17 (3), 211-226 Dawson, S. (2008) A study of the relationship between student social networks and sense of community. Educational Technology & Society, 11(3), 224-238.

38. The End