ABSTRACT
This chapter describes the ACT-R theory of skill acquisition which is an update of the ACT theory of skill acquisition. It begins by discussing how knowledge gets stored in this form. The chapter describes how such declarative knowledge gets interpreted to produce behavior. It discusses how such interpretive application of knowledge becomes compiled into production form. The chapter describes how declarative knowledge is tuned once it is in production form. It focuses on the relationship between acquisition of new knowledge at the symbolic level and tuning of this knowledge at a sub symbolic level. Determining when people will next need to use that chunk or rule is another issue. Much of cognitive psychology can be construed as the study of how declarative knowledge gets its content. If the system chooses to create a production rule, it should fashion one that is the equivalent of the computation that was involved in the interpretive application of the declarative knowledge.
