Thanks a lot Cristina, I found them very useful, I will check your references in my University's Dabatabase. I have also reviewed these three books, you can (partially) read them using Google Books: Flink, Arlene (2002) How to Ask Survey Questions Sage Publications Hine, Christine (2005) Virtual methods: issues in social research on the Internet Berg Publishers Sue, Valerie (2008) Conducting Online Surveys Sage Publications ------------------------ Hi Michael, Maybe you can find something useful in these books: - Garton, L., C. Haythornthwaite and B. Wellman (1999) Studying On-Line Social Networks, in S.G. Jones (ed.) Doing Internet Research: Critical Issues and Methods for Examining the Net, pp. 75106. Thousand Oaks, CA: SAGE. - Gunter, B., D. Nicholas, P. Huntington and P. Williams (2002) Online Versus Offline Research: Implications for Evaluating Digital Media, Aslib Proceedings - Jones, S.G. (ed.) (1999) Doing Internet Research: Critical Issues and Methods for Examining the Net. Thousand Oaks, CA: SAGE. - Leece, P., M. Bhandari, S. Sprague, M. Swiontkowski, E. Schemitsch, P. Tornetta, P. Devereaux and G. Guyatt (2004) Internet Versus Mailed Questionnaires: A Randomized Comparison, Journal of Medical Internet Research - Moss, J. and G. Hendry (2002) Use of Electronic Surveys in Course Evaluation, British Journal of Educational Technology - Van Selm, M. and N.W. Jankowski (2006) Conducting Online Surveys, Quality and Quantity Cheers, Cristina Miguel Msc Interactive Digital Communication Universidad de Vic Sagrada Familia, 7 08500 Vic (Barcelona) www.uvic.cat