This book represents the first major attempt by any author to provide an integrated account of the evidence for bias in human reasoning across a wide range of disparate psychological literatures. Foreword, Introduction, The Nature of Reasoning Tasks, The Rationality Debate, Theories of Reasoning, Approach and Form of this Book, Selective Processing, Theoretical Concepts, Empirical Case Studies, Conclusions, Confirmation Bias, The Nature of Scientific Inference, Wason's Selection Task, Diagnosticity and Pseudo-Diagnosticity, Effects of Content and Context, Knowledge and Reasoning, Biasing Effects of Knowledge, Content Effects in Statistical Reasoning, Discussion and Conclusions, Self-Knowledge, Theoretical Issues, Conclusions, Implications and Applications, The Nature of Reasoning Biases, Approaches to Debiasing, Some Final Thoughts, References, Author and Subject Index.