Abstract

The debate between Classicism and Connectionism can be properly characterized as a debate concerning the appropriate levels of analysis for psychological theorizing. Classicists maintain that the level of analysis defined by the Classical architecture is the level of analysis at which psychological theorizing should reside. This level is called the symbolic level. On the other hand, Connectionists claim that the proper level of analysis for cognitive modeling is at the subsymbolic level which is considered a level lower than the symbolic level. This thesis argues that both Classicism and Connectionism characterized in the above way are single-level approaches. It is argued in this thesis that Classicism is wrong in denying the cognitive relevancy of the lower-level theorizing; and some forms of Connectionism should be rejected because they underestimate the theoretical significance of the higher-level modeling. ;The concept of level is widely employed by philosophers and cognitive scientists, but has not received sufficient analysis. This thesis offers a general theory of levels, and evaluates Classicism and Connectionism on the basis of this general theory of levels. Basically this thesis argues that a cognitive system should be regarded as a system organized into a hierarchy of levels of organization. Different levels of organization may demand different levels of analysis. This thesis argues that each level of analysis enjoys a degree of autonomy, i.e., it is not totally reducible to the lower-level analysis. The traditional dichotomy of the cognitive and the implementational levels is too simplistic and overlooks the complexity of a cognitive system. Not all levels of organization of a system are cognitively relevant. But much empirical evidence has shown that many levels of organization are either strongly relevant or at least weakly relevant to cognitive modeling. It would be theoretically more plausible and fruitful to adopt a multi-level approach which takes many levels of analysis seriously in cognitive modeling. A very general picture of a multi-level approach to the mind is depicted in this thesis