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1 Vol. 51 No (Jan. 2010) Webjig Web Web Webjig Web Web Webjig Web DOM Document Object Model Web Web Webjig: A Visualization System for Analyzing User Behaviors in Dynamic Web Sites Mikio Kiura, 1 Masao Ohira, 1 Hidetake Uwano 2 and Ken-ichi Matsumoto 1 In this paper, we propose a recording/visualization system of user behaviors on a dynamic Web site for usability evaluation. Several existing systems only record histories of user s operations without output displayed on a Web browser. Hence, understanding of user s behavior in a dynamic Web site is quite difficult. Our system called Webjig records sequential changes of browser output by analyzing DOM (Document Object Model) used in a Web site. Using three subjects with over 5 years industrial experience of Web site development, we experimentally evaluated the effectiveness of the Webjig. As a result, we have observed that developers could found usability issues from user behaviors recorded by Webjig. 1. Ajax Asynchronous JavaScript + XML Web Web Web Web Web Web Web Web Web Web Web 1),2) Web Web 3) 5) Web 6) 9) Web 10) 16) Web Web 17) Web 1 Graduate School of Information Science, Nara Institute of Science and Technology 2 Department of Information Engineering, Nara National College of Technology GN 204 c 2010 Information Processing Society of Japan
2 205 Webjig Web Web Webjig Web Webjig (a) (a) Drop-down menu is closed 1 (b) (b) Drop-down menu is opened JavaScript Web Fig. 1 An example of a drop-down menu using JavaScript. Web 1 JavaScript Web Web Web Web Webjig Webjig Web DOM Document Object Model Webjig 6) 9) Web think-aloud 18) 9) 16) Webjig Web Web Web Web Web 11) 15) Hong Web IP 14) Web
3 206 Webjig Web Webjig Web DOM Document Object Model Web 3. Webjig Web Webjig Webjig Web DOM 2 Webjig Webjig 1) Webjig::Fetch 2) Webjig::DB 3) Webjig::Analysis Webjig::Fetch Webjig::Fetch Web Webjig::Fetch Web Fetch JavaScript 3 1 Web Fetch Webjig::DB Webjig::Fetch 1 Fetch Web Web DOM Web 10 <html> <head> <title>sample Page</title> </head> <body> <p>sample Content</p> </body> <script src= Webjig::Fetch URL ></script> </html> Fig. 3 3 Webjig::Fetch HTML An example of a Webjig::Fetch script inserted in a HTML source code. Table 1 1 Webjig Types of data collected by Webjig and timings of data collection and transmission. Fig. 2 2 Webjig The system architecture of Webjig. Web Web
4 207 Webjig Web Fig. 5 5 A heat map generated by trajectories of a mouse cursor. 4 Webjig::Analysis Fig. 4 Screenshot of Webjig::Analysis. Fetch Webjig::DB Webjig::DB Webjig::Fetch Webjig::DB Webjig::Fetch MySQL Web Webjig::DB Webjig::Analysis 3.3 Webjig::Analysis Webjig::Analysis Webjig::Fetch Web Webjig::Analysis Web Webjig::DB JavaScript Web 4 Webjig::Analysis Webjig::Analysis Fetch DOM 5
5 208 Webjig Web 2 Webjig Table 2 Inspectionable items using Webjig. A B C D E F - - Web A Web B C D E F Web 3.4 Webjig ISO ) Webjig Web 2 Webjig (1) (2) Web 2 C D E 2 A B F Webjig Web 4. Web Webjig Webjig 4.1 Web Web 3 20 Table 3 Usage of dynamic interfaces on the top 20 sites in Japan. yahoo.co.jp, fc2.com, google.co.jp, youtube.com rakuten.co.jp, ameblo.jp livedoor.com, mixi.jp, goo.ne.jp, google.com, nicovideo.jp wikipedia.org, 2ch.net msn.com, amazon.co.jp, nifty.com, biglobe.ne.jp, yourfilehost.com, geocities.jp, infoseek.co.jp ( ) Flash Webjig Web JavaScript 3 20 Web Webjig Flash nicovideo.jp yourfilehost.com 18 Web Ajax jquery 3 Yahoo! User Interface Library YUI API Ajax API Web jquery YUI API 5 Webjig API Ajax Web 4.2 Webjig Webjig 4 Web 3) 1 Web Alexa Internet jquery 4 The Yahoo! User Interface Library
6 209 Webjig Web Table 4 4 Webjig Comparison between Webjig and similar methods in usability evaluation. Web Web 30 5 MouseTrack 11) 20 UsaProxy 12) 20 Webjig ) Web 3) MouseTrack Usa- Proxy Web Web 12) Web Web Webjig Web 3.1 Webjig Web Web Webjig::Fetch 1 Web Web 5. Web Webjig 5.1 Webjig 2 Webjig Web Web 5.4 Web Web 2 Webjig 2) 4),9),10) Webjig Webjig Webjig Web Web Web 5.2 Web 5 3 Web 51 Web Web Web Web 2 Web
7 210 Webjig Web Table 5 5 Item names and categories used in Item searching tasks. 1 AV 2 SD Web 5.4 Web 5 Webjig Web Web 6 Web Fig. 6 A screenshot of the website used in the experiment. Web 24 Web 3 Web Web Web E Web 6 Web Web Top JavaScript Web (1) Webjig (2) Webjig Web Web (3) Web Webjig Web (4) Webjig 6.
8 211 Webjig Web Web Web 6.1 Web 24 20) 3) 20) 6.2 Web Web Web Web 7 Fig. 7 Task execution time of users before website usability improvement. AV 6.3 Web Web Web %
9 212 Webjig Web 6 Table 6 Results of first category selection % *12.5% 0.0% 0.0% 0.0% 0.0% 45.8% 0.0% 12.5% 4.2% AV *4.2% 33.3% 0.0% 0.0% 20.8% 54.2% 4.2% 70.8% 29.2% *29.2% 4.2% 4.2% 0.0% 0.0% 0.0% 8.3% 0.0% 4.2% *58.3% 45.8% 0.0% 0.0% *25.0% 0.0% 0.0% 7 Table 7 Change plans of the menu categories. 1 AV 2 SD Web Web 7 4 SD Web 6.4 Web Web Fig. 8 8 Comparison of task execution time. 8 Mann-Whitney U Table 8 Result of Mann-Whitney U test. U Z p Mann-Whitney U Web
10 213 Webjig Web Webjig 6.1 Web 3) Webjig Web 6.3 Webjig 6.2 Web Web Web Web Web 6.3 Web 4 Webjig 7.2 Webjig 6.4 Webjig Web Webjig Web % 29.6% Web Webjig Web Webjig 8. Web Webjig Webjig Web Webjig Web Web Webjig IT B IT Web
11 214 Webjig Web 1) McCracken, D.D., Wolfe, R.J. and Spool, J.M.: User-Centered Web Site Development: A Human-Computer Interaction Approach, Prentice Hall, NJ (2003). 2) Pearrow, M.: Web Site Usability Handbook (Internet Series), 2nd Edition, Charles River Media, MA (2006). 3) Nielsen, J.: Usability Engineering, Academic Press, London, UK (1993). 4) Nielsen, J.: Designing Web Usability, Peachpit Press, CA (1999). 5) Nielsen, J. and Loranger, H.: Prioritizing Web Usability, New Riders Press, CA (2006). 6) Dumas, J.S. and Redish, J.C.: A Practical Guide to Usability Testing, Ablex Publishing Corporation, NJ (1993). 7) (2004). 8) Vol.45, No.5, pp (2001). 9) Vol.58, No.6, pp (2008). 10) Webtracer Web Vol.44, No.11, pp (2003). 11) Arroyo, E., Selker, T. and Wei, W.: Usability Tool for Analysis of Web Designs Using Mouse Tracks, Proc. CHI 06 Extended Abstracts on Human Factors in Computing Systems, pp (2006). 12) Atterer, R. and Schmidt, A.: Tracking the Interaction of Users with AJAX Applications for Usability Testing, Proc. 25th Conference on Human Factors in Computing Systems (CHI 07 ), pp (2007). 13) Etgan, M. and Cantoe, J.: What does getting WET (Web Event-Logging Tool) Mean for Web Usability?, Proc. 5th Conference on Human Factors and the Web (HFWEB99 ) (1999). available from etgen-cantor/index.html (accessed ) 14) Hong, J.I. and Landay, J.A.: WebQuilt: A framework for capturing and visualizing the web experience, Proc. 10th International Conference on World Wide Web (WWW 01 ), pp (2001). 15) Juliana, V.A., Anupam, V., Freire, J., Kumar, B. and Lieuwen, D.: Automating Web Navigation with the WebVCR, Computer Networks: The International Journal of Computer and Telecommunications Networking, Vol.33, No.1 6, pp (2000). 16) Vol.13, No.3, pp (2008). 17) Barnum, C.M.: Usability Testing and Research, Longman, London, UK (2001). 18) Ericsson, K.A. and Simon, H.A.: Protocol Analysis: Verbal Reports as Data, MIT Press, Cambridge, MA (1984). 19) ISO :1988: Ergonomic requirements for office work with visual display terminals (VDTs) Part 11: Guidance on usability (1998). 20) (2005). ( ) ( ) Web Web Web R&D 2008 IT Web
12 215 Webjig Web / ACM / ACM IEEE Senior Member IEEE ACM
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