As usual, the Proceedings of the International Colloquium on Cognitive Science include leading-edge work by outstanding researchers in the field. This volume contains three kinds of papers corresponding to three of the main disciplines in cognitive science: philosophy, psychology, and artificial intelligence. The title - Cognition, Agency and Rationality - captures the main issues addressed by the papers. Of course, all are concerned with cognition, but some are especially centred on the very concept of rationality, while others focus on (multiple) agency. The diversity of their disciplinary origins and standpoints not only reflects the main topics and the range of different positions presented at ICCS-97, as well as demonstrating the richness, fruitfulness and diversity of research in cognitive science today.

DISCOURSE, INTERACTION, AND COMMUNICATION Co-organized by the Department of Logic and Philosophy of Science and the Institute for Logic, Cognition, Language, and Infonnation (ILCLI) both from the University of the Basque Country, tlle Fourth International Colloquium on Cognitive Science (ICCS-95) gathered at Donostia - San Sebastian ti'om May 3 to 6, 1995, with the following as its main topics: 1. Social Action and Cooperation. 2. Cognitive Approaches in Discourse Processing: Grammatical and Semantical Aspects. 3. Models of Infonnation in Communication Systems. 4. Cognitive Simulation: Scope and Limits. More tllan one hundred researchers from all over the world exchanged their most recent contributions to Cognitive Science in an exceptionally fruitful annosphere. In this volume we include a small though representative sample of tlle main papers. They all were invited papers except the one by Peter Juel Henrichsen, a contributed paper tllat merited tlle IBERDROLA - Gipuzkoako Foru Aldundia: Best Paper Award, set up in ICCS-95 for the first time.

DISCOURSE, INTERACTION, AND COMMUNICATION Co-organized by the Department of Logic and Philosophy of Science and the Institute for Logic, Cognition, Language, and Infonnation (ILCLI) both from the University of the Basque Country, tlle Fourth International Colloquium on Cognitive Science (ICCS-95) gathered at Donostia - San Sebastian ti'om May 3 to 6, 1995, with the following as its main topics: 1. Social Action and Cooperation. 2. Cognitive Approaches in Discourse Processing: Grammatical and Semantical Aspects. 3. Models of Infonnation in Communication Systems. 4. Cognitive Simulation: Scope and Limits. More tllan one hundred researchers from all over the world exchanged their most recent contributions to Cognitive Science in an exceptionally fruitful annosphere. In this volume we include a small though representative sample of tlle main papers. They all were invited papers except the one by Peter Juel Henrichsen, a contributed paper tllat merited tlle IBERDROLA - Gipuzkoako Foru Aldundia: Best Paper Award, set up in ICCS-95 for the first time.

As usual, the Proceedings of the International Colloquium on Cognitive Science include leading-edge work by outstanding researchers in the field. This volume contains three kinds of papers corresponding to three of the main disciplines in cognitive science: philosophy, psychology, and artificial intelligence. The title - Cognition, Agency and Rationality - captures the main issues addressed by the papers. Of course, all are concerned with cognition, but some are especially centred on the very concept of rationality, while others focus on (multiple) agency. The diversity of their disciplinary origins and standpoints not only reflects the main topics and the range of different positions presented at ICCS-97, as well as demonstrating the richness, fruitfulness and diversity of research in cognitive science today.