Simon (University of Bristol, UK) Farrell & Stephan (University of Western Australia, Australia) Lewandowsky 
Computational Modeling in Cognition : Principles and Practice [PDF ebook] 
Principles and Practice

An accessible introduction to the principles of computational and mathematical modeling in psychology and cognitive science This practical and readable work provides students and researchers, who are new to cognitive modeling, with the background and core knowledge they need to interpret published reports, and develop and apply models of their own. The book is structured to help readers understand the logic of individual component techniques and their relationships to each other.