The CLARION cognitive architecture: Extending cognitive modeling to social simulation. Sun, R. Cognition and MultiAgent Interaction, 2006.
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This chapter presents an overview of a relatively recent cognitive architecture for modeling cognitive processes of individual cognitive agents (in a psychological sense) (see Sun et al., 1998, 2001; Sun, 2002). We will start with a look at some general ideas underlying this cognitive architecture as well as the relevance of these ideas to social simulation. To tackle a host of issues arising from computational cognitive modeling that are not adequately addressed by many other existent cognitive architectures, such as the implicit-explicit interaction, the cognitivemetacognitive interaction, and the cognitive-motivational interaction, CLARION, a modularly structured cognitive architecture, has been developed (Sun, 2002; Sun et al., 1998, 2001). Overall, CLARION is an integrative model. It consists of a number of functional subsystems (for example, the action-centered subsystem, the metacognitive subsystem, and the motivational subsystem). It also has a dual representational structure implicit and explicit representations being in two separate components in each subsystem. Thus far, CLARION has been successful in capturing a variety of cognitive processes in a variety of task domains based on this division of modules (Sun et al., 2002). See Figure 4.1 for a sketch of the architecture. A key assumption of CLARION, which has been argued for amply before (see Sun et al., 1998, 2001; Sun, 2002), is the dichotomy of implicit and explicit cognition. Generally speaking, implicit processes are less accessible and more holistic, whereas explicit processes are more accessiblee crisp (Reber, 1989; Sun, 2002). This dichotomy is closely related to some other well-known dichotomies in cognitive science: the dichotomy of symbolic versus subsymbolic processing, the dichotomy of conceptual versus subconceptual processing, and so on (Smolensky, 1988; Sun, 1994).

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