External and internal complexity of complex adaptive systems

Theory Biosci. 2004 Jun;123(1):69-88. doi: 10.1016/j.thbio.2003.10.001.

Abstract

We introduce concepts of external and internal complexity to analyze the relation between an adaptive system and its environment. We apply this theoretical framework to the construction of models in a cognitive system and the selection between hypotheses through selective observations performed on a data set in a recurrent process and propose a corresponding neural network architecture.