ABSTRACT
This chapter presents a number of convergent arguments and empirical evidence for a unified theoretical approach that explains both intuitive and deliberate judgments as rule based, as opposed to the dual-systems approach of qualitatively different processes. Rules and the appropriate situations for their use can be acquired through personal experience, social development, and acculturation. This applies to both intuitive and deliberate judgments. The chapter suggests that every rule exploits core capacities and that the specific capacities determine the set of rules a species or an individual can execute in a reliable way. It discusses three classes of novel findings afforded by unitary framework and incompatible with implications of the dual-systems models. These concern evidence that instantiation difficulty determines the amount of processing potential that a rule requires for it to be selected for use, higher processing potential is not aligned with selecting more complex rules, and less processing can lead to more accurate judgments.
