A. Agrawal and R. Srikant, Fast algorithms for mining association rules, International Conference on Very Large Databases, pp.487-499, 1994.

A. Anjewierden, text analysis support for ontology development and social research, 2007.

R. H. Baayen, R. Piepenbrock, and L. Gulikers, The CELEX lexical database (release 2) [cd-rom], 1995.

J. Cohen, A Coefficient of Agreement for Nominal Scales, Educational and Psychological Measurement, vol.20, issue.1, pp.37-46, 1960.
DOI : 10.1177/001316446002000104

F. De-jong, B. Kollöffel, H. Van-der-meijden, J. Staarman, and J. Janssen, Regulative processes in individual, 3D and computer supported cooperative learning contexts, Computers in Human Behavior, vol.21, issue.4, pp.645-670, 2005.
DOI : 10.1016/j.chb.2004.10.023

T. De and J. , Technological advances in inquiry learning, Science, vol.321, pp.532-533, 2006.
URL : https://hal.archives-ouvertes.fr/hal-00190793

H. Gijlers, T. De, and J. , The relation between prior knowledge and students' collaborative discovery learning processes, Journal of Research in Science Teaching, vol.10, issue.3, pp.264-282, 2005.
DOI : 10.1002/tea.20056
URL : https://hal.archives-ouvertes.fr/hal-00190796

C. D. Hulshof, Log File Analysis, In Encyclopedia of Social Measurement, vol.2, pp.577-583, 2004.
DOI : 10.1016/B0-12-369398-5/00509-0

C. D. Hulshof, T. De, and J. , Using just-in-time information to support scientific discovery learning in a computer-based simulation, Interactive Learning Environments, vol.8, issue.1, pp.79-94, 2006.
DOI : 10.1016/j.chb.2004.03.013
URL : https://hal.archives-ouvertes.fr/hal-00190688

J. Janssen, G. Erkens, and G. Kanselaar, Visualization of agreement and discussion processes during computer-supported collaborative learning, Computers in Human Behavior, vol.23, issue.3, pp.1105-1125, 2007.
DOI : 10.1016/j.chb.2006.10.005

J. Janssen, G. Erkens, G. Kanselaar, and J. Jaspers, Visualization of participation: Does it contribute to successful computer-supported collaborative learning?, Computers & Education, vol.49, issue.4
DOI : 10.1016/j.compedu.2006.01.004

D. S. Kerr and U. S. Murthy, Divergent and convergent idea generation in teams: A comparison of computer-mediated and face-to-face communication. Group Decision and Negotiation, pp.381-399, 2004.

J. Luan, Data mining and knowledge management in higher education: Potential applications, Annual Forum for the Association for Institutional Research, 2002.

C. D. Manning and H. Schütze, Foundations of Statistical Natural Language Processing, 1999.

A. Mccallum and K. Nigam, A comparison of event models for naive bayes text classification, AAAI-98 Workshop on Learning for Text Categorization, 1998.

N. Saab, Chat and Explore: The role of support and motivation in collaborative scientific discovery learning, 2005.

G. Salomon and D. N. Perkins, Individual and Social Aspects of Learning, Review of Research in Education, vol.23, pp.1-24, 1998.
DOI : 10.2307/1167286

H. Salovaara, An exploration of students' strategy use in inquiry-based computer-supported collaborative learning, Journal of Computer Assisted Learning, vol.23, issue.special issue, pp.39-52, 2005.
DOI : 10.1111/j.1365-2729.2005.00112.x

B. Santorini, Part-of-speech tagging guidelines for the Penn Treebank project, 1991.

H. Schmid, Probabilistic part-of-speech tagging using decision trees, International Conference on New Methods in Language Processing, 1994.

A. L. Soller, Computational Modeling and Analysis of Knowledge Sharing in Collaborative Distance Learning, User Modeling and User-Adapted Interaction, vol.14, issue.4, 2002.
DOI : 10.1023/B:USER.0000043436.49168.3b

P. A. Streifer and J. A. Schumann, Using Data Mining to Identify Actionable Information: Breaking New Ground in Data-Driven Decision Making, Journal of Education for Students Placed at Risk (JESPAR), vol.10, issue.3, pp.281-293, 2005.
DOI : 10.1002/(SICI)1098-111X(200006)15:6<535::AID-INT4>3.0.CO;2-9

H. I. Strømsø, P. Grøttum, and K. H. Lycke, Content and processes in problem-based learning: a comparison of computer-mediated and face-to-face communication, Journal of Computer Assisted Learning, vol.34, issue.3, pp.271-282, 2007.
DOI : 10.1111/j.1365-2729.2007.00221.x

J. Van-der-linden, G. Erkens, H. Schmidt, and P. Renshaw, Collaborative Learning, New Learning, pp.37-54, 2000.
DOI : 10.1007/0-306-47614-2_3

W. Wong, W. Liu, and M. Bennamoun, Integrated scoring for spelling error correction, abbreviation expansion and case restoration in dirty text, Australian Conference on Data Mining, 2006.