This book focuses on the role and impact of computational models as research tools in major areas of cognitive science. In particular, it deals with the development, implementation and evaluation of computational models in the fields of reasoning, learning and discovery. The book addresses the discussion of formalization and computation with respect to different cognitive architectures as well. Furthermore, major architectures will be compared with regard to their impact on theories of information processing in different domains (e.g., natural-language understanding, problem-solving, knowledge representation).