M. S. Andreasen, H. V. Nielsen, S. O. Schrøder, and J. Stage, What Happened to Remote Usability Testing? An Empirical Study of Three M ethods, Proceedings of Conference on Human Factors in Computing Systems, pp.1405-1414, 2007.

T. Boren and J. Ramey, Thinking aloud: reconciling theory and practice, IEEE Transactions on Professional Communication, vol.43, issue.3, pp.261-278, 2000.
DOI : 10.1109/47.867942

A. Bruun, P. Gull, L. Hofmeister, and J. Stage, Let your users do the testing, Proceedings of the 27th international conference on Human factors in computing systems, CHI 09, pp.1619-1628, 2009.
DOI : 10.1145/1518701.1518948

J. Cohen, Statistical power analysis for the behavioral sciences, 1988.

J. Dumas and J. Redish, A Practical Guide to Usability Testing, 1999.

K. A. Ericsson and H. A. Simon, Protocol Analysis: Verbal Reports As Data, revised edition, 1996.

W. D. Gray and M. C. Salzman, Damaged Merchandise? A Review of Experiments That Compare Usability Evaluation Methods, Human???Computer Interaction, vol.34, issue.4, pp.203-261, 1998.
DOI : 10.1016/0020-7373(92)90039-N

M. J. Van-den-haak, M. D. De-jong, and P. J. Schellens, Retrospective vs. concurrent think-aloud protocols: Testing the usability of an online library catalogue, Behaviour & Information Technology, vol.36, issue.5, pp.339-351, 2003.
DOI : 10.1037/0022-0663.92.3.413

R. D. Henderson, M. C. Smith, J. Podd, and H. Varela-alvarez, A comparison of the four prominent user-based methods for evaluating the usability of computer software, Ergonomics, vol.1, issue.10, pp.2030-2044, 1995.
DOI : 10.1007/978-1-349-19618-0

M. Hertzum, K. Hansen, A. , and H. , Scrutinising usability evaluation: does thinking aloud affect behaviour and mental workload?, Behaviour & Information Technology, vol.28, issue.2, pp.165-181, 2009.
DOI : 10.1080/01449290701773842

M. Hertzum and K. D. Holmegaard, Thinking Aloud in the Presence of Interruptions and Time Constraints, International Journal of Human-Computer Interaction, vol.33, issue.4, pp.351-364, 2013.
DOI : 10.1037/0022-3514.60.2.181

M. Hertzum and N. E. Jacobsen, The Evaluator Effect: A Chilling Fact About Usability Evaluation M ethods, International Journal of Human Computer Interaction, 2003.

E. Krahmer and N. Ummelen, Thinking About Thinking Aloud: A Comparison of TwoVerbal Protocols for Usability Testing, IEEE Transactions on Professional Communication, vol.47, issue.2, pp.105-117, 2004.
DOI : 10.1109/TPC.2004.828205

M. Cdonald, S. Edwards, H. Zhao, and T. , Exploring Think-Alouds in Usability Testing: An International Survey, IEEE Transactions on Professional Communication, vol.55, issue.1, pp.2-19, 2012.
DOI : 10.1109/TPC.2011.2182569

M. Olich and R. , User-Friendly Web Design (in Danish), Ingeniøren Books, 2000.

M. Nørgaard and K. Hornbaek, What do usability evaluators do in Practice? An explorative study of think-aloud testing, Proceedings of DIS 2006, pp.209-219, 2006.

E. L. Olmsted-hawala, E. D. Hawala, S. Ashenfelter, and K. T. , Think-aloud protocols, Proceedings of the 28th international conference on Human factors in computing systems, CHI '10, pp.2381-2390, 2010.
DOI : 10.1145/1753326.1753685

D. Rhenius and G. Deffner, Evaluation of concurrent thinking aloud using eyetracking data, Proceedings of Human Factors Society 34th Annual Meeting, pp.1265-1269, 1990.
DOI : 10.1177/154193129003401719

J. Rubin and D. Chisnell, Handbook of Usability Testing: How to Plan, Design, and Conduct Effective Tests, 2008.

M. B. Skov and J. Stage, A Conceptual Tool for Usability Problem Identification in Website Development, International Journal of Information Technology and Web Engineering, vol.4, issue.4, pp.22-35, 2009.
DOI : 10.4018/jitwe.2009100102

D. Wixon, Evaluating Usability M ethods: Why the Current Literature Fails the Practitioner, pp.29-34, 2003.
DOI : 10.1145/838830.838870

A. Woolrych, K. Hornbaek, E. Frøkjaer, and G. Cockton, Ingredients and Meals Rather Than Recipes: A Proposal for Research That Does Not Treat Usability Evaluation Methods as Indivisible Wholes, International Journal of Human-Computer Interaction, vol.2, issue.10, pp.940-970, 2011.
DOI : 10.1145/838830.838870

R. Wright and S. Converse, M ethod bias and concurrent verbal protocol in software usability testing, Proceedings of Human Factors Society 36th Annual Meeting, pp.1220-1224, 1992.
DOI : 10.1177/154193129203601608

T. Zhao, S. Cdonald, and H. M. Edwards, The impact of two different thinkaloud instructions in a usability test: a case of just following orders?, Behaviour & Information Technology, 2012.