The research GRoup of Interaction And e-Learning (GRIAL) is a Recognised Research Group of the University of Salamanca and a Recognised Group of Excellence by the Regional Council of Castille and León. The group is formed by a large number of researchers from different fields of knowledge (see "Miembros del grupo"). Most members have a technical or a pedagogical profile, but there are also members with expertise in e-Learning project management, Humanities, Sciences, etc. The research activity of the group in these last few years has ranged from purely technical and computing projects to the development of pedagogical methodologies and models of reference in the field of online learning which have gained international recognition and awards.
We present game-theoretic models of opinion formation in social networks where opinions themselves co-evolve with friendships. In these models, nodes form their opinions by maximizing agreements with friends weighted by the strength of the relationships, which in turn depend on difference in opinion with the respective friends. We define a social cost of this process by generalizing recent work of Bindel et al., FOCS 2011. We tightly bound the price of anarchy of the resulting dynamics via local smoothness arguments, and characterize it as a function of how much nodes value their own (intrinsic) opinion, as well as how strongly they weigh links to friends with whom they agree more.
This study collected and benchmarked information from 31 European countries (27 EU Member States, Croatia, Iceland, Norway and Turkey) on the access, use, competence and attitudes of students and teachers regarding ICT in schools.
A survey of teachers shows that digital tools are widely used in their classrooms and professional lives. Yet, many of these middle and high school teachers are hampered by disparities in student access to digital technologies.
The authors discuss the advantages and disadvantages of using e-mail and the Web to conduct research surveys, and also offer practical suggestions for designing and implementing Internet surveys most effectively.