Adam Smith was baptized on 5 June 1723 in the Fife seaport of Kirkcaldy, where his father, who died on 9 January 1723, had served as Comptroller of Customs. Father Adam Smith studied the liberal arts in Aberdeen, took legal training in Edinburgh qualifying him for estate management, and became secretary to a Campbell magnate. He hesitated about taking up a Customs post in Kirkcaldy, because his income there depended on volume of trade, which was falling off. However, he (...) handled his money well, and married the daughter of a substantial Fife laird. His Will specified that his widow, Margaret Douglas, would get help in raising young Adam from guardians associated with intellectual and economic improvement in Scotland. (shrink)

Good reasoning can lead to success; bad reasoning can lead to catastrophe. Yet, it's not obvious how we reason, and why we make mistakes. This new book by one of the pioneers of the field, Philip Johnson-Laird, looks at the mental processes that underlie our reasoning. It provides the most accessible account yet of the science of reasoning.

This book aims to pinpoint the connection feelings have with behaviour - a connection that, while clear, has never been fully explained. Following William James, Laird argues that feelings are not the cause of behavior but rather its consequences; the same goes for behaviour and motives and behaviour and attitudes. He presents research into feelings across the spectrum, from anger to joy to fear to romantic love, that support this against-the-grain view. Laird discusses the problem of common sense, (...) self-perception theory, the association between feelings and higher cognitive processes, and also the literature on facial expression, posture, and gaze. (shrink)

This paper reviews current psychological theories of syllogistic inference and establishes that despite their various merits they all contain deficiencies as theories of performance. It presents the results of two experiments, one using syllogisms and the other using three-term series problems, designed to elucidate how the arrangement of terms within the premises affects performance. These data are used in the construction of a theory based on the hypothesis that reasoners construct mental models of the premises, formulate informative conclusions about the (...) relations in the model, and search for alternative models that are counterexamples to these conclusions. This theory, which has been implemented in several computer programs, predicts that two principal factors should affect performance: the figure of the premises, and the number of models that they call for. These predictions were confirmed by a third experiment. Dans cet article sont passées en revue les théories psychologiques du traitement des syllogismes. On établit qu'en dépit de leurs mérites variés toutes sont en défaut en tant que théories de la performance. On présente les résultats de deux expériences, une utilisant des syllogismes et l'autre des problémes avec des séries de trois termes conçues pour élucider comment l'arrangement des termes dans les premises affecte la performance. Ces données sont utilisées pour construire une théorie fondée sur l'hypothése que les gens construisent des modèles mentaux des premises, formulent des conclusions explicites sur les relations dans le modèle et cherchent des modèles qui seraient des contre-exemples pour leurs conclusions. Cette théorie, utilisée dans plusieurs programmes d'ordinateur, prédit que deux principaux facteurs affectent la performance: la figure des premises et le nombre de; modèles qu'ils mettent en jeu. Cette prédiction est confirmée dans les trois expériences. (shrink)

This article outlines a theory of naive probability. According to the theory, individuals who are unfamiliar with the probability calculus can infer the probabilities of events in an extensional way: They construct mental models of what is true in the various possibilities. Each model represents an equiprobable alternative unless individuals have beliefs to the contrary, in which case some models will have higher probabilities than others. The probability of an event depends on the proportion of models in which it occurs. (...) The theory predicts several phenomena of reasoning about absolute probabilities, including typical biases. It correctly predicts certain cognitive illusions in inferences about relative probabilities. It accommodates reasoning based on numerical premises, and it explains how naive reasoners can infer posterior probabilities without relying on Bayes's theorem. Finally, it dispels some common misconceptions of probabilistic reasoning. (shrink)

John Laird was a Scottish philosopher who specialised in metaphysics and moral philosophy. In this early work, which was originally published in 1920, Laird set out to analyse some of the more perplexing problems of philosophical realism. The text includes a brief survey of philosophical realism at the beginning and critical notes throughout. This book will be of value to anyone with an interest in the works of Laird and the history of philosophy.

William James’s theory of emotion has been controversial since its inception, and a basic analysis of Cannon’s critique is provided. Research on the impact of facial expressions, expressive behaviors, and visceral responses on emotional feelings are each reviewed. A good deal of evidence supports James’s theory that these types of bodily feedback, along with perceptions of situational cues, are each important parts of emotional feelings. Extensions to James’s theory are also reviewed, including evidence of individual differences in the effect of (...) bodily responses on emotional experience. (shrink)

Scientific and technological policy issues are not and should not be exempt from the norms of democratic governance. This article examines two major theories of democracy, analyzes their commonalities and differences, and derives criteria for evaluating various forms of public participation in policymaking. The author argues for a new category of participation, participatory analysis, that includes forms of participation that satisfy democratic criteria and emphasizes the importance of learning among participants. Different types of participatory analysis may be best suited to (...) different kinds of policy problems. (shrink)

Van der Henst argues that the theory of mental models lacks a pragmatic component. He fills the gap with the notion that reasoners draw the most relevant conclusions. We agree, but argue that theories need an element of “nondeterminism.” It is often impossible to predict either what will be most relevant or which particular conclusion an individual will draw.

The essence of Hume’s eighteenth-century philosophy was that all the sciences were ‘dependent on the science of man’, and that the foundations of any such science need to rest on experience and observation. This title, first published in 1932, examines in detail how Hume interpreted ‘the science of man’ and how he applied his experimental methodology to humankind’s understanding, passions, social duties, economic activities, religious beliefs and secular history throughout his career. Particular attention is paid to the English, French and (...) Latin sources that shaped Hume’s theories. This is a full and fascinating title, of particular relevance to students with an interest in the philosophy of Hume specifically, as well as the philosophy of human nature and the methodologies applied to its study more generally_. _. (shrink)

This essay responds to recent philosophical interest in the Anthropocene by asking : Can and should educators adopt, form, transmit, teach ways of living to maintain, if not enhance Earth’s habitability, especially its habitability for diverse children? This inquiry therefore calls for conceptual study of learning to live through the Anthropocene—with, despite, after, before, amid, among, away from, and against its myriad harms, possible and actual, especially its harms to children. Examining cases of environmental racism in Checker’s Polluted Promises, and (...) other cases of environmental threats to children’s health, in Steingraber’s Raising Elijah, this study begins by proposing the ecological gap in philosophy of education consequential for children resides within another epistemological gap, variously designated gender gap, love gap, care gap. Ruddick’s maternal thinking provides a conceptual frame for theorizing three moral aims of learning to live in the Anthropocene that might inform public schooling. (shrink)

This homage to Danny Kahneman and Amos Tversky describes how each of them thought about psychology. It outlines the principal results of their collaborative research, which was their most original and most influential. Why? In search of an explanation it examines their joint thinking during their collaboration.

I Introduction In recent years there have arisen from several quarters, even within analytic philosophy itself, various challenges to the "positivist" ...

John Laird was a Scottish philosopher who specialised in metaphysics and moral philosophy. In this book, which was first published in 1929, Laird provides a detailed analysis of the philosophical nature of value. The text begins with a discussion of the main definitions of value, before going through a more detailed examination of the various applications of value in turn. This book will appeal to anyone with an interest in value and the history of philosophy.

In this account of the way in which we understand music, Laird Addis explains how sounds can have such profound effects on those listening to them.

Knauff and Gazzo Castañeda (this issue) critique the "new paradigm" – a framework that replaces logic with probabilities – on the grounds that there existed no "old” paradigm for it to supplant. Their position is supported by the large numbers of theories that theorists developed to explain the Wason selection task, syllogisms, and other tasks. We propose some measures to inhibit such facile theorizing, which threatens the viability of cognitive science. We show that robust results exist contrary to the new (...) paradigm, and that it is unable to account for other results. (shrink)

How do people make deductions? The orthodox view in psychology is that they use formal rules of inference like those of a “natural deduction” system.Deductionargues that their logical competence depends, not on formal rules, but on mental models. They construct models of the situation described by the premises, using their linguistic knowledge and their general knowledge. They try to formulate a conclusion based on these models that maintains semantic information, that expresses it parsimoniously, and that makes explicit something not directly (...) stated by any premise. They then test the validity of the conclusion by searching for alternative models that might refute the conclusion. The theory also resolves long-standing puzzles about reasoning, including how nonmonotonic reasoning occurs in daily life. The book reports experiments on all the main domains of deduction, including inferences based on prepositional connectives such as “if” and “or,” inferences based on relations such as “in the same place as,” inferences based on quantifiers such as “none,” “any,” and “only,” and metalogical inferences based on assertions about the true and the false. Where the two theories make opposite predictions, the results confirm the model theory and run counter to the formal rule theories. Without exception, all of the experiments corroborate the two main predictions of the model theory: inferences requiring only one model are easier than those requiring multiple models, and erroneous conclusions are usually the result of constructing only one of the possible models of the premises. (shrink)

AN entity is a natural sign if by its very nature it represents some other entity or would-be entity. Many different kinds of things are said to represent other things, and in many cases it is recognized that the connection is purely conventional, in others that it is partly conventional being based in some sense on natural relations, and perhaps in yet others purely natural. My thesis is that a thought and a thought alone is, or contains as a constituent, (...) an entity that is a natural sign. This could be denied by rejecting either the existential claim or the uniqueness claim: most who deny it, which appears to be the overwhelming majority of contemporary philosophers who worry about such matters, say that there are no natural signs. As for the uniqueness claim, I shall for the moment merely register my conviction that an entity that is or contains a natural sign is necessarily a state of consciousness, and indeed the common feature of states of consciousness. (shrink)

This paper argues that mental models of discourse are key in any theory of the interpretation of definite descriptions. It considers both referential and attributive uses of such descriptions, in the sense introduced by Donnellan.

Sudoku puzzles, which are popular worldwide, require individuals to infer the missing digits in a 9 9 array according to the general rule that every digit from 1 to 9 must occur once in each row, in each column, and in each of the 3-by-3 boxes in the array. We present a theory of how individuals solve these puzzles. It postulates that they rely solely on pure deductions, and that they spontaneously acquire various deductive tactics, which differ in their difficulty (...) depending on their “relational complexity”, i.e., the number of constraints on which they depend. A major strategic shift is necessary to acquire tactics for more difficult puzzles: solvers have to keep track of possible digits in a cell. We report three experiments corroborating this theory. We also discuss their implications for theories of reasoning that downplay the role of deduction in everyday reasoning. (shrink)