We introduce a spatial model of concentration dynamics that supports the emergence of spatiotemporal inhomogeneities that engage in metabolism–boundary co-construction. These configurations exhibit disintegration following some perturbations, and self-repair in response to others. We define robustness as a viable configuration’s tendency to return to its prior configuration in response to perturbations, and plasticity as a viable configuration’s tendency to change to other viable configurations. These properties are demonstrated and quantified in the model, allowing us to map a space of viable configurations and their possible transitions. Combining robustness and plasticity provides a measure of viability as the average expected survival time under ongoing perturbation, and allows us to measure how viability is affected as the configuration undergoes transitions. The framework introduced here is independent of the specific model we used, and is applicable for quantifying robustness, plasticity, and viability in any computational model of artificial life that demonstrates the conditions for viability that we promote.

Key words: autopoiesis, viability, robustness, plasticity, spatial dynamical system, metabolism

In der jüngeren Sozialisationstheorie wird vermehrt die Intention formuliert, die Eigenaktivität des Subjektes im Sozialisationsprozess stärker zu berücksichtigen. Zum einen wird dies mit der Formel des ‘produktiv realitätsverarbeitenden Subjektes’ auf den Begriff gebracht, zum anderen bemüht sich insbesondere die kompetenzorientierte ‘konstruktivistische Sozialisationsforschung’ dieses Programm zu verfolgen. Dabei wird jedoch ein handlungstheoretisches Subjektverständnis bemüht, das eine begriffliche Unschärfe produziert, die eine konsistente Subjekttheorie und damit eine trennscharfe Bestimmung der Eigenaktivität des Subjektes erschwert. Um dieses Problem zu lösen, wird in dem Beitrag der Vorschlag gemacht, das Subjekt erkennt-nistheoretisch bzw. -kritisch zu konzipieren. Dadurch wird ein Subjektverständnis instruiert, das die Subjekt-Objekt-Dichotomie überwindet und die Wirklichkeit als je subjektives Konstrukt begreift Der Vorteil dieses zunächst heuristischen Vorschlages liegt einerseits in der Möglichkeit einer konsistenten Subjektbestimmung und andererseits in einer forschungsanleitenden Programmatik, die einen breiteren Zugang zu individuellen Entwicklungsverläufen ermöglicht. – English: From the “individual as a productive processor of reality” to the “individual as a productive producer of reality”. A philosophical foundation of theory of socialization. In recent theory of socialisation there is an increasing awareness giving more attention to the agency of subjects itself in the process of socialization. Direct indications about that change into the focus of theory of socialization are the often used formula of the “ individual as a productive processor of reality” or the programme of the constructivist research of socialization. In both cases still many problems are produced first of all through the idea of an action-theory based subject. One of the main theses in this article is that this understanding aggravates a consistent theory of subject in theories of socialization and so an unequivocal definition of agency of subjects. To solve that problems 1 suggest to conceptualise the subject epistemologically. The consequence of this strategy will offer a comprehension of the subject that is able to overcome the subject-object-dichotomy and to recognize “reality” as a construct made by subjects in a strict sense. On the one hand the advantage of this firstly heuristic proposal is the possibility to ascertain consistently the subject. On the other hand further research may be fruitful instructed because of the broader understanding of individual development. ||

In recent theory of socialisation there is an increasing awareness giving more attention to the agency of subjects itself in the process of socialization. Direct indications about that change into the focus of theory of socialization are the often used formula of the “individual as a productive processor of reality” or the programme of the constructivist research of socialization. In both cases still many problems are produced first of all through the idea of an action-theory based subject. One of the main theses in this article is that this understanding aggravates a consistent theory of subject in theories of socialization and so an unequivocal definition of agency of subjects. To solve that problems I suggest to conceptualise the subject epistemologically. The consequence of this strategy will offer a comprehension of the subject that is able to overcome the subject-object-dichotomy and to recognize “reality” as a construct made by subjects in a strict sense. On the one hand the advantage of this firstly heuristic proposal is the possibility to ascertain consistently the subject. On the other hand further research may be fruitful instructed because of the broader understanding of individual development.

Notions of embodiment, situatedness, and dynamics are increasingly being debated in cognitive sci ence. However, these debates are often carried out in the absence of concrete examples. In order to build intuition, this paper explores a model agent to illustrate how the perspective and tools of dynam ical systems theory can be applied to the analysis of situated, embodied agents capable of minimally cognitive behavior. Specifically, we study a model agent whose “nervous system” was evolved using a genetic algorithm to catch circular objects and to avoid diamond-shaped ones. After characterizing the performance, behavioral strategy and psychophysics of the best-evolved agent, its dynamics are analyzed in some detail at three different levels: (1) the entire coupled brain/body/environment sys tem; (2) the interaction between agent and environment that generates the observed coupled dynam ics; (3) the underlying neuronal properties responsible for the agent dynamics. This analysis offers both explanatory insight and testable predictions. The paper concludes with discussions of the overall picture that emerges from this analysis, the challenges this picture poses to traditional notions of rep resentation, and the utility of a research methodology involving the analysis of simpler idealized mod els of complete brain/body/environment systems.

Key words: dynamics, minimally-cognitive behavior, categorical perception

Maturana and Varela’s notion of autopoiesis has the potential to transform the conceptual foundation of biology as well as the cognitive, behavioral, and brain sciences. In order to fully realize this potential, however, the concept of autopoiesis and its many consequences require significant further theoretical and empirical development. A crucial step in this direction is the formulation and analysis of models of autopoietic systems. This article sketches the beginnings of such a project by examining a glider from Conway’s game of life in autopoietic terms. Such analyses can clarify some of the key ideas underlying autopoiesis and draw attention to some of the central open issues. This article also examines the relationship between an autopoietic perspective on cognition and recent work on dynamical approaches to the behavior and cognition of situated, embodied agents. Relevance: The article focuses on the theory of autopoiesis and related concepts such as structural coupling and cognitive domain.

This article examines in some technical detail the application of Maturana and Varela’s biology of cognition to a simple concrete model: a glider in the game of Life cellular automaton. By adopting an autopoietic perspective on a glider, the set of possible perturbations to it can be divided into destructive and nondestructive subsets. From a glider’s reaction to each nondestructive perturbation, its cognitive domain is then mapped. In addition, the structure of a glider’s possible knowledge of its immediate environment, and the way in which that knowledge is grounded in its constitution, are fully described. The notion of structural coupling is then explored by characterizing the paths of mutual perturbation that a glider and its environment can undergo. Finally, a simple example of a communicative interaction between two gliders is given. The article concludes with a discussion of the potential implications of this analysis for the enactive approach to cognition.

Key words: autopoiesis, enaction, cognitive domain, structural coupling, cellular automata.

Maturana and Varela’s concept of autopoiesis defines the essential organization of living systems and serves as a foundation for their biology of cognition and the enactive approach to cognitive science. As an initial step toward a more formal analysis of autopoiesis, this paper investigates its application to the compact, recurrent spatiotemporal patterns that arise in Conway’s Game of Life cellular automata. In particular, we demonstrate how such entities can be formulated as self-constructing networks of interdependent processes that maintain their own boundaries. We then characterize the specific organizations of several such entities, suggest a way to simplify the descriptions of these organizations, and briefly consider the transformation of such organizations over time. Relevance: The paper presents an analysis of a minimal concrete model of autopoiesis to provide a more rigorous foundation for the concept of autopoiesis and highlight its ambiguities and difficulties.

Using a glider in the Game of Life cellular automaton as a toy model, we explore how questions of origins might be approached from the perspective of autopoiesis. Specifically, we examine how the density of gliders evolves over time from random initial conditions and then develop a statistical mechanics of gliders that explains this time evolution in terms of the processes of glider creation, persistence and destruction that underlie it.

The notion of structural coupling plays a central role in Maturana and Varela’s biology of cognition framework and strongly influenced Varela’s subsequent enactive elaboration of this framework. Building upon previous work using a glider in the Game of Life (GoL) cellular automaton as a toy model of a minimal autopoietic system with which to concretely explore these theoretical frameworks, this article presents an analysis of structural coupling between a glider and its environment. Specifically, for sufficiently small GoL universes, we completely characterize the nonautonomous dynamics of both a glider and its environment in terms of interaction graphs, derive the set of possible glider lives determined by the mutual constraints between these interaction graphs, and show how such lives are embedded in the state transition graph of the entire GoL universe.

Key words: autopoiesis, enaction, structural coupling, cellular automata, enactivism