Short overview of my PhD research

1. ADVANCED techniques to support THE DESIGN OF WEBSITES INFORMATION ARCHITECTURE BASED ON MODELS OF HUMAN-INFORMATION INTERACTION Christos Katsanos (ckatsanos@ece.upatras.gr) HCI Group, University of Patras, Greece

2. Purpose & Motivation Increase objectivity & efficiency for the design & evaluation of websites information organization Aspects addressed Structural design Links’ Labeling Both aspects addressed greatly affect User Experience Existing approaches are often neglected: Time & Cost constraints Increased complexity of data analysis Large & Rapidly-changing web sites Hard to go from user-research to the design itself

3. Proposed approach at a glance Two tool-based methods: Automated Card Sorting Tool (AutoCardSorter) InfoScent Evaluator Tool (ISEtool) Based on Information Foraging Theory Semantic Similarity Algorithms (e.g. Latent Semantic Analysis) Mathematical/Statistical techniques (e.g. cluster analysis, eigenvalue analysis)

5. Katsanos C., Tselios N., Avouris N. (2008) AutoCardSorter: Designing the Information Architecture of a Web Site using Latent Semantic Analysis. In Proceedings of the SIGCHI conference on Human factors in computing systems, CHI 2008 (pp. 875-878), Florence, Italy: ACM Press, April 5-10, 2008,

6. Tselios N., Katsanos C., Avouris N. (2007) Beyond user centered design: A web design approach based on information foraging theory. In Proceedings of Workshop Are New Methods Needed in User-Centered System Design?, INTERACT 2007, Rio de Janeiro, Brazil, 10-14 September 2007AutoCardSorter – Structural Design

7. Method Overview Semantic Similarity Measure (e.g. LSA) Hierarchical Clustering Algorithms Page Text Descriptions Semantic Similarity Matrix Interactive Tree Structure Additional Support Number of Groups Cross-Hierarchy Links

8. Tool Interface Additional Support Interactive Tree Structure Page Descriptions

9. 4 Validation Studies vs AutoCardSorter CardSorting

11. Tselios N., Katsanos C., Avouris N. (2009). Investigating the Effect of Hyperlink Information Scent on Users’ Interaction with a Web Site. In Proceedings of the 12th IFIP TC13 Conference in Human-Computer Interaction, INTERACT 2009, LNCS 5727, Part II (pp. 138-142), Uppsala, Sweden: Springer Verlag, August 24-28, 2009.

12. Tselios N., Katsanos C., Avouris N. (2007) Beyond user centered design: A web design approach based on information foraging theory. In Proceedings of Workshop Are New Methods Needed in User-Centered System Design?, INTERACT 2007, Rio de Janeiro, Brazil, 10-14 September 2007

13. Katsanos C., Tselios N., Avouris N., (2006). InfoScent Evaluator: A semi-automated tool to evaluate hyperlinks’ semantic appropriateness of a web site. In Proceedings of OZCHI 2006 (pp. 373 – 376). Sydney: ACM Press.ISEtool – Links’ Labeling

14. Method Overview “Information Scent” = Semantic Similarity Measure (e.g. LSA) Parser Navigability Issues Evaluated Web Page Page Level Competing Links Weak Scent Unfamiliar Words Links Properties Table UserGoal in Text Site Level ‘Bad’ Scent Trail

15. Tool Interface User goal Internal Browser Links Properties Table Weak Scent Link

16. 2 Validation Eye-Tracking Studies

17. Advantages of proposed tool-based approach Cost-effective (time & resources) Explore alternative solutions early Simple to learn and apply Easy to apply for large sites (>100) Can be easily incorporated in popular web development IDEs Valuable for sites that have totally unfamiliar domain to the practitioner Possibility for wider adoption Complementary to user-based methods

19. Download papers related to the research presented

20. Ask to try out the tools

21. Comments, Feedback or any Inquiries

22. ckatsanos@ece.upatras.grThank you!