This volume is the outcome of the European Conference on Cognitive Science- EuroCogSci-2011 - which was organized by the Cognitive Science Society and hosted by the New Bulgarian University and its Department of Cognitive Science and Psychology and the Central and East European Center for Cognitive Science and was held between May 21st and 24th 2011 in Sofia, Bulgaria.

The European Conferences in Cognitive Science have a long tradition. EuroCogSci-2011 is the third regional Cognitive Science Conference that takes place under the auspices of the Cognitive Science Society in Europe. These conferences take place every 4 years. It can be seen as the convergence of two separate traditions of cognitive science meetings. The first of these is the series of biennial meetings known as the European Conference on Cognitive Science (ECCS) that was initiated in 1995 in St. Malo, France, and followed by meetings in Manchester, England (1997) and Siena, Italy (1999). The second is the long tradition of Cognitive Science Society meetings, begun in 1979 and held annually since then. The two traditions came together when, in response to suggestions by cognitive scientists from Europe and elsewhere, the Cognitive Science Society hold its first non-North American meeting at the University of Edinburgh in 2001. The success of this meeting reflected the greater internationalization of the field and prompted European researchers to propose that the Cognitive Science Society sponsor a series of regional European conferences, taking the place of the ECCS. The first European Cognitive Science Conference under the auspices of the Cognitive Science Society took place in Osnabruck in September 2003, and the second one in Delphi, Greece in May 2007, and the third one in Sofia, Bulgaria in 2011.

EuroCogSci-2011 gathered more than 150 participants not only from Europe, but from all over the world. Here is the number of participants by country: Belgium - 2, Brazil - 1, Bulgaria - 37, Canada - 1, China - 1, Czech Republic - 2, Denmark - 1, Finland - 1, France - 5, Germany - 16, Greece - 4, Hungary - 3, Ireland - 2, Italy - 12, Japan - 3, Malta - 1, Netherlands - 4, New Zealand - 1, Morocco - 1, Portugal - 2, Russia - 16, Singapore - 2, South Korea - 1, Spain - 2, Sweden - 4, UK - 19, Ukraine - 1, USA - 7.

The Conference featured 5 invited talks, some 80 regular talks, 20 posters, and 20 invited participants in 5 symposia. All traditional areas of cognitive science were covered, including perception, memory, learning, language, problem solving, reasoning, decision-making, concepts and categorization, but also a number of relatively new areas of research such as social cognition, embodied cognition, emotions and cognition, music and art cognition have been represented at the conference. In terms of disciplines there were papers from modeling, psychological experimentation with adults and children, animal cognition, anthropology, sociology, cognitive neurosciences, linguistics, philosophy.

We would like to thank the staff and students at NBU, who bore the organization of the conference, and especially Stanislava Borisova - the main local organizer who perfectly coordinated everything, and Ivan Vankov who was the publication and dissemination manager and helped with the Web site and the Proceedings.

We would also like to thank our sponsors: The New Bulgarian University and its Fund for Strategic Developments, the Cognitive Science and Psychology Department at NBU, and the Cognitive Science Society.

Sofia, 12th of May, 2011

Boicho Kokinov, Annette Karmiloff-Smith, Nancy J. Nersessian