Hypothetical thought involves the imagination of possibilities and the exploration of their consequences by a process of mental simulation. In this Classic Edition, Jonathan St B T Evans' presents his pioneering Hypothetical Thinking Theory; an integrated theoretical account of a wide range of psychological studies on hypothesis testing, reasoning, judgement and decision making. Hypothetical Thinking Theory is built on three key principles and implemented in a version of Evans' well-known heuristic-analytic theory of reasoning. The central claim of this book is that this theory can provide an integrated account of apparently diverse phenomena including confirmation bias in hypothesis testing, acceptance of fallacies in deductive reasoning, belief biases in reasoning and judgement, biases of statistical judgement and numerous characteristic findings in the study of decision making. Featuring a reflective and insightful new introduction to the book, this classic edition discusses contemporary theory on cognitive biases, human rationality and dual-process theories of higher cognition. It will be of great interest to researchers, post graduates as well as advanced undergraduate students.

David E. Over is a leading cognitive scientist and, with his firm grounding in philosophical logic, he also exerts a powerful influence on the psychology of reasoning. He is responsible for not only a large body of empirical work and accompanying theory, but for advancing a major shift in thinking about reasoning, commonly known as the 'new paradigm' in the psychology of human reasoning. Over's signature mix of philosophical logic and experimental psychology has inspired generations of researchers, psychologists, and philosophers alike over more than a quarter of a century. The chapters in this volume, written by a leading group of contributors including a number who helped shape the psychology of reasoning as we know it today, each take their starting point from the key themes of Over's ground-breaking work. The essays in this collection explore a wide range of central topics-such as rationality, bias, dual processes, and dual systems-as well as contemporary psychological and philosophical theories of conditionals. It concludes with an engaging new chapter, authored by David E. Over himself, which details and analyses the new paradigm psychology of reasoning. This book is therefore important reading for scholars, researchers, and advanced students in psychology, philosophy, and the cognitive sciences, including those who are not familiar with Over's thought already.

This collection of essays focuses on three reasoning problems devised by Peter Wason - the selection task, the 2-4-6 task, and the THOG problem - which have had a considerable influence since their invention.; The reasons why people make so many errors in these seemingly simple tasks are still not fully understood. A variety of different theoretical perspectives have been used in trying to explain performance. These include the mental models approach, the pragmatic reasoning approach, and the mental logic approach. This book contains chapters which discuss all these theories. Other chapters review the literature or offer alternative theoretical perspectives. A final chapter by Peter Wason describes how he came to create the tasks discussed.

Deductive reasoning is widely regarded as an activity central to human intelligence, and as such has attracted a large amount of psychological study. In this survey of the field, the authors provide a detailed and balanced review of all the main kinds of deductive reasoning tasks studied by psychologists. Topics covered include conditional and disjunctive reasoning, the Wason selection task, relational inference, and reasoning with syllogisms and quantifiers.; Throughout the review, a distinction is drawn between the main empirical findings in the field and the major theoretical approaches proposed to account for these findings. Discussion of experimental findings is organized around three central questions: what is the extent and limitation of human competence in deductive reasoning?; what factors are responsible for systematic errors and biases on reasoning tasks?; and how is human reasoning influenced by the content in which logical problems are presented?; Four major classes of theory are discussed throughout the book. The long-established theory that people have a mental logic comprised of formal rules of inference is contrasted particularly with the more recently developed mental model theory of deductive reasoning. Explanations of many phenomena, especially biases, are also considered in terms of heuristic processes. Finally, consideration is given to accounts of content and context effects based upon the use of domain-sensitive rules or schemas.; The book ends with a discussion of research on deductive reasoning in the context of the debate about human rationality.

David E. Over is a leading cognitive scientist and, with his firm grounding in philosophical logic, he also exerts a powerful influence on the psychology of reasoning. He is responsible for not only a large body of empirical work and accompanying theory, but for advancing a major shift in thinking about reasoning, commonly known as the 'new paradigm' in the psychology of human reasoning. Over's signature mix of philosophical logic and experimental psychology has inspired generations of researchers, psychologists, and philosophers alike over more than a quarter of a century. The chapters in this volume, written by a leading group of contributors including a number who helped shape the psychology of reasoning as we know it today, each take their starting point from the key themes of Over's ground-breaking work. The essays in this collection explore a wide range of central topics-such as rationality, bias, dual processes, and dual systems-as well as contemporary psychological and philosophical theories of conditionals. It concludes with an engaging new chapter, authored by David E. Over himself, which details and analyses the new paradigm psychology of reasoning. This book is therefore important reading for scholars, researchers, and advanced students in psychology, philosophy, and the cognitive sciences, including those who are not familiar with Over's thought already.

Hypothetical thought involves the imagination of possibilities and the exploration of their consequences by a process of mental simulation. In this Classic Edition, Jonathan St B. T. Evans presents his pioneering hypothetical thinking theory; an integrated theoretical account of a wide range of psychological studies on hypothesis testing, reasoning, judgement and decision making. Hypothetical thinking theory is built on three key principles and implemented in a version of Evans' well-known heuristic-analytic theory of reasoning. The central claim of this book is that this theory can provide an integrated account of apparently diverse phenomena including confirmation bias in hypothesis testing, acceptance of fallacies in deductive reasoning, belief biases in reasoning and judgement, biases of statistical judgement and numerous characteristic findings in the study of decision making. Featuring a reflective and insightful new introduction to the book, this Classic Edition discusses contemporary theory on cognitive biases, human rationality and dual-process theories of higher cognition. It will be of great interest to researchers, post graduates as well as advanced undergraduate students.

Hypothetical thought involves the imagination of possibilities and the exploration of their consequences by a process of mental simulation. In this Classic Edition, Jonathan St B. T. Evans presents his pioneering hypothetical thinking theory; an integrated theoretical account of a wide range of psychological studies on hypothesis testing, reasoning, judgement and decision making. Hypothetical thinking theory is built on three key principles and implemented in a version of Evans' well-known heuristic-analytic theory of reasoning. The central claim of this book is that this theory can provide an integrated account of apparently diverse phenomena including confirmation bias in hypothesis testing, acceptance of fallacies in deductive reasoning, belief biases in reasoning and judgement, biases of statistical judgement and numerous characteristic findings in the study of decision making. Featuring a reflective and insightful new introduction to the book, this Classic Edition discusses contemporary theory on cognitive biases, human rationality and dual-process theories of higher cognition. It will be of great interest to researchers, post graduates as well as advanced undergraduate students.

Hypothetical thought involves the imagination of possibilities and the exploration of their consequences by a process of mental simulation. Using a recently developed theoretical framework called Hypothetical Thinking Theory, Jonathan St. B. T. Evans provides an integrated theoretical account of a wide range of psychological studies on hypothesis testing, reasoning, judgement and decision making.

Hypothetical thinking theory is built on three key principles, implemented in a revised and updated version of Evans' well-known heuristic-analytic theory of reasoning. The central claim of this book is that this theory can provide an integrated account of some apparently very diverse phenomena including confirmation bias in hypothesis testing, acceptance of fallacies in deductive reasoning, belief biases in reasoning and judgement, biases of statistical judgement and a number of characteristic findings in the study of decision making. The author also provides broad ranging discussion of cognitivebiases, human rationality and dual-process theories of higher cognition.

Hypothetical Thinking draws on and develops arguments first proposed in Evans' earlier work from this series, Bias in Human Reasoning. In the new theory, however, cognitive biases are attributed equally to analytic and heuristic processing and a much wider range of phenomena are reviewed and discussed. It will therefore be of great interest to researchers and post-graduates in psychology and the cognitive sciences, as well as to undergraduate students looking for a comprehensive review of current work on reasoning and decision-making.

Common sense would suggest that we are in complete control of the actions we perform - that all our actions are the result of considered and conscious preparation. Yet, there are countless examples of this control breaking down, for example, in the case of phobias and compulsive actions. We can all recall those times when, in the 'heat of the moment', our actions have been very different to those that would have resulted from calm and considered reflection. In extreme moments of 'absent-mindedness' our actions can even have castastrophic consequences, resulting in harm to ourselves or others. So why does this happen - why do apparently rational and intelligent beings make, what appear to be, such fundamental errors in their thinking. This book explores the idea that humans have two distinct minds within their brains: one intuitive and the other reflective. The intuitive mind is old, evolved early, and shares many of its features with animal cognition. It is the source of emotion and intuitions, and reflects both the habits acquired in our lifetime and the adaptive behaviours evolved by ancient ancestors. The reflective mind, by contrast, is recently evolved and distinctively human: it enables us to think in abstract and hypothetical ways about the world around us and to calculate the future consequences of our actions. The evolution of the new, reflective mind is linked with the development of language and the very large forebrains that distinguish humans from other species; it has also given us our unique human form of intelligence. On occasions though, our two minds can come into in conflict, and when this happens, the old mind often wins. These conflicts are often rationalised so that we, conscious persons, are unaware that the intuitive mind is in control. Written by a leading cognitive scientist, this book demonstrates how much of our behaviour is controlled by automatic and intuitive mental processes, which shape, as well as compete, with our conscious thinking and decision making. Accessibly written, and assuming no prior knowledge of the field, the book will be fascinating reading for all those interested in human behaviour, including students and researchers in psychology, neuroscience, and philosophy.

In recent years, there has been a massive upsurge in interest in the psychology of thinking and reasoning. This book contains contributions from virtually all the main players involved in research into these areas. It focuses on three reasoning problems devised by Peter Wason which have inspired countless journal articles over the past 25 years: the selection task, the 2-4-6 task and the THOG problem. Despite this intense interest, the reasons why people make so many errors in these seemingly simple tasks are still not fully understood. A variety of different theoretical perspectives have been used in trying to explain performance. These include: the mental models approach, the pragmatic reasoning approach and the mental logic approach. All of the leading proponents of these theories have contributed chapters to this book in which they expand and update their theories. Other chapters, some reviewing the literature, others offering new theoretical perspectives, have been produced by leading researchers from both sides of the Atlantic. There is a final chapter from Peter Wason himself, whose early research prompted the initial interest in these areas. He describes how he came to create the tasks which have proved so influential. The entire book is in essence a tribute to his enormous contribution to research in the psychology of reasoning. This book will be of relevance to all those interested in human thinking, including students and researchers in psychology, cognitive science and philosophy.