Cognitive modelling in the systems theory paradigm

In a cultural panorama which reconsiders the philosophical presuppositions and methodologies of cognitive science, this paper focuses on the systemic paradigm as a general framework capable of unifying different approaches to cognitive science. The paper outlines how structured system models constit ute a useful basis for a dynamic approach to cognition. A systemic invarian t, to be used in cognitive studies, is also introduced. Finally some cognit ive considerations are made from a systemic view of cognition. Copyright (C ) 1999 John Wiley & Sons, Ltd.