'If' is one of the most important words in the English language, being used to express hypothetical thought. The use of conditional terms such as 'if' distinguishes human intelligence from that of all other animals. In this volume, Jonathan Evans and David Over present a new theoretical approach to understanding conditionals. The book draws on studies from the psychology of judgement and decision making, as well as philosophical logic.

In recent years, the psychology of reasoning has been undergoing a paradigm shift, with general Bayesian, probabilistic approaches replacing the older, much more restricted binary logic paradigm. At the same time, dual processing theories have been gaining influence. We argue that these developments should be integrated and moreover that such integration is already underway. The new reasoning paradigm should be grounded in dual processing for its algorithmic level of analysis just as it uses Bayesian theory for its computational level of (...) analysis. Moreover, we propose that, within the new paradigm, these levels of analysis reflect on each other. Bayesianism suggests a specific theoretical understanding of dual processing. Just as importantly, the duality in processing carries over to duality in function; although both types of processes compute degrees of belief, they generate different functions. (shrink)

A feature is central to a concept to the extent that other features depend on it. Four studies tested the hypothesis that people will project a feature from a base concept to a target concept to the extent that they believe the feature is central to the two concepts. This centrality hypothesis implies that feature projection is guided by a principle that aims to maximize the structural commonality between base and target concepts. Participants were told that a category has two (...) or three novel features. One feature was the most central in that more properties depended on it. The extent to which the target shared the feature's dependencies was manipulated by varying the similarity of category pairs. Participants' ratings of the likelihood that each feature would hold in the target category support the centrality hypothesis with both natural kind and artifact categories and with both well-specified and vague dependency structures. (shrink)

Volume 26, Issue 2, May 2020, Page 151-158.

This is an excerpt from the contentThere has been increasing interest in recent years in dual process theories of human thought. This special issue of Mind and Society reflects this interest, some criticisms of these theories, and the major topics that have been discussed and debated as a result. There is the basic topic of how the postulated dual processes should be defined in the first place. Do these processes have essential defining features that can be distinguished from less central (...) correlates? Can decoupling, metarepresentation, or working memory be used for making the essential distinction?There are questions about how these dual processes work and interact. What do dual process theories tell us about different modes of thought and insight in problem solving? One topic that could throw light on these questions is creative thinking. It deals with novelties and yet can be rule following. It can be an aspect of hypothetical thinking, but how far it is a conscious or unconscious process is still unknown. There is th. (shrink)