The Handbook of Rationality is the most authoritative and comprehensive guide through the field of human rationality as it stands today. It brings together the two leading disciplines concerned with rationality: psychology and philosophy. Rationality is a key concept in both disciplines, but until now publications on rationality were mainly mono-disciplinary with almost no overlap between philosophy and psychology. Philosophers explicated what it means to be rational, and put forth general principles, theories, and axioms explicating the norms of rationality. In contrast, psychologists empirically investigate the extent to which people’s cognition and behavior conforms to those norms of rationality, and explain deviations when they occur. The Handbook of Rationality, for the first time, creates a bridge between the two disciplines and also includes chapters from behavioral economics, artificial intelligence, and cognitive neuroscience. Written by the foremost experts in the disciplines, 65 individual chapters cover the main normative and descriptive theories of rationality, how people ought to think, how they actually think, and why we (so often) deviate from what we can call rational. It also covers topics such as morality and rationality, social rationality, rational argumentation, game theory, legal and deontic thinking, scientific rationality, visual reasoning, and even topics such as the rationality of the public understanding of science, and how people can improve their rational thinking. This broad coverage of topics is unique in the field and offers researchers and students from many different disciplines a valuable insight into the complex subject of human rationality.

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