Ulrike Cress is full professor at the University of Tuebingen and deputy director of the Knowledge Media Research Center. Ulrike Cress conducted many projects about web-based learning (financed by EU, DFG, National and federal ministries of Science. She is Executive Editor of the International Journal of Computer-supported Collaborative Learning and board member of the Educational Psychologist. Furthermore, she is member of the CSCL-Committee within the International Society of the Learning Sciences.

• ​I. Different Theoretical Views on Mass Collaboration.- A History of Mass Collaboration.- Social and Systemic Epistemology.- Mass Collaboration as Co-Evolution between Cognitive and Social Systems.- Cultures of Participation.- From Distributed Cognition to Collective Intelligence.- II. Tools and Environments for Mass Collaboration.- Collective Knowledge in Tagging Environments.- Participatory Discovery Networks: The Future of Online Learning.- Collaboration and Cooperation.- Language Technology for Mass Collaboration in Education.- Mass Collaboration as a Basis of Procedures for E-Participation.- III. Wikipedia as a Tool to Analyze Mass Collaboration.- Individual vs. Collaborative Information Processing: The Case of Biases in Wikipedia.- A Tool for Analyzing Language Points of View in Wikipedia.- Understanding and Bridging the Points of View in the Wikipedia Language Gap.- SNA in Wikipedia.