1. Survey Visualization Maria Tkatchenko CPSC 533C December 15, 2004

2. Problem Survey composed of Questionnaire Collected data Want to explore relationships between responses to various questions

3. Data set National Election Studies center’s pre- and post-election surveys National Center for Chronic Disease Prevention and Health Promotion Behavioral Risk Factor survey 1K - 100K respondents 100s of questions (dimensions)

4. Statistics Correlation measure of “closeness” of two sets of data degree to which the association of two variables approaches a linear function ranges from -1 to 1 higher (absolute) value is better

5. Main elements of solution

6. Textual View

7. Questionnaire View

8. Correlation View

9. Raw Data View (1)

10. Raw Data View (2)

11. Control Panel

12. Implementation InfoVis Toolkit SGT Toolkit Java 2D and Swing Data formats CSV, converted to TQD TXT

13. Let’s explore one possible scenario

14. Find a question

15. Correlation View

16. Questionnaire View

17. Raw Data View

18. Interesting correlation with:

19. Correlation View

20. Questionnaire View

21. Interesting correlation with:

22. Raw Data View

23. Another scenario

24. Filter

25. Questions

26. Find a few correlations of interest

27. Select correlations

28. Cross-correlations

29. Questions?