ABSTRACT
This chapter concludes with an appendix that is intended to serve as a multiple index to the ACT-R theory. This appendix lists the assumptions of the ACT-R theory, and describes their critical attributes. The chapter describes what behavioral implications follow from the assumption. It discusses how the author conceives that the assumption might be implemented in the brain. The chapter describes what happens with respect to a single production instantiation. The neural realization of multiple instantiations of a single production has been problematic. Declarative knowledge is acquired by the direct encoding of experience, whereas procedural knowledge is acquired through practice. The top elements on goal stacks and elements focused on from the environment are sources of activation. The goal and the elements in the current context are predictive of what memory chunks will be useful. Production strength helps resolve contention for access to declarative memory.
