Inferences about spatial, temporal, and other relations are ubiquitous. This article presents a novel model-based theory of such reasoning. The theory depends on 5 principles. The structure of mental models is iconic as far as possible. The logical consequences of relations emerge from models constructed from the meanings of the relations and from knowledge. Individuals tend to construct only a single, typical model. They spontaneously develop their own strategies for relational reasoning. Regardless of strategy, the difficulty of an inference depends (...) on the process of integration of the information from separate premises, the number of entities that have to be integrated to form a model, and the depth of the relation. The article describes computer implementations of the theory and presents experimental results corroborating its main principle. (shrink)

Given a basic conditional of the form, If A then C, individuals usually list three cases as possible: A and C, not‐A and not‐C, not‐A and C. This result corroborates the theory of mental models. By contrast, individuals often judge that the conditional is true only in the case of A and C, and that cases of not‐A are irrelevant to its truth or falsity. This result corroborates other theories of conditionals. To resolve the discrepancy, we devised two new tasks: (...) the “collective” truth task, in which participants judged whether sets of assertions about a specific individual, such as: If A then C, not‐A, C, could all be true at the same time; and one in which participants judged the truth of conditional predictions about specific future events. The results consistently matched the three possibilities, thereby corroborating the model theory. They also showed a massive violation of the probability calculus in estimates of the probabilities of the four cases in the partition of conditionals (A and C, A and not‐C, not‐A and C, and not‐A and not‐C), which summed to over 200%. (shrink)

Moral patients deserve moral consideration and concern – they have moral standing. What factors drive attributions of moral standing? Understanding these factors is important because it indicates how broadly individuals conceptualize the moral world, and suggests how they will treat various entities, both human and non-human. This understanding has recently been advanced by a series of studies conducted by both psychologists and philosophers, which have revealed three main drivers of moral standing: the capacity to suffer, intelligence or autonomy, and the (...) nature of an entity's disposition. These studies have also revealed causal links between moral standing and other variables of interest, namely, mental state attributions and moral behavior. In this review, I consider this recent research, aiming to clarify what the balance of evidence indicates about how moral standing is judged and about its links to mind perception and behavior. I conclude by suggesting open questions for future research on this exciting topic. (shrink)

Prior research on the psychology of retribution is complicated by the difficulty of separating retributive and general deterrence motives when studying human offenders . We isolate retribution by investigating judgments about punishing animals, which allows us to remove general deterrence from consideration. Studies 2 and 3 document a “victim identity” effect, such that the greater the perceived loss from a violent animal attack, the greater the belief that the culprit deserves to be killed. Study 3 documents a “targeted punishment” effect, (...) such that the responsive killing of the actual “guilty” culprit is seen as more deserved than the killing of an almost identical yet “innocent” animal from the same species. Studies 4 and 5 extend both effects to participants' acceptance of inflicting pain and suffering on the offending animal at the time of its death, and show that both effects are mediated by measures of retributive sentiment, and not by consequentialist concerns. (shrink)

Ethical disputes arise over differences in the content of the ethical beliefs people hold on either side of an issue. One person may believe that it is wrong to have an abortion for financial reasons, whereas another may believe it to be permissible. But, the magnitude and difficulty of such disputes may also depend on other properties of the ethical beliefs in question—in particular, how objective they are perceived to be. As a psychological property of moral belief, objectivity is relatively (...) unexplored, and we argue that it merits more attention. We review recent psychological evidence which demonstrates that individuals differ in the extent to which they perceive ethical beliefs to be objective, that some ethical beliefs are perceived to be more objective than others, and that both these sources of variance are somewhat systematic. This evidence also shows that differences in perceptions of objectivity underpin quite different psychological reactions to ethical disagreement. Apart from reviewing this evidence, our aim in this paper is to draw attention to unanswered psychological questions about moral objectivity, and to discuss the relevance of moral objectivity to two issues of public policy. (shrink)

Following important work by Pizarro, Uhlmann and Salovey (2003) on moral judgments of uncontrolled/impulsive versus controlled/ deliberate action, we focus on the related issue of the moral evaluation of emotion-motivated versus principle-driven behavior. We examine: (a) the potential lesser blameworthiness of antisocial acts perceived as driven by emotion as opposed to principle; (b) how factors governing the moral evaluation of antisocial acts might extend to the evaluation of prosocial acts; and (c) how overriding a moral emotion in favor of a (...) moral principle affects moral attributions. (shrink)

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)

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)

We draw on the behavioral agency model to explore the ethical consequences of CEO equity incentives. We argue that CEOs are more concerned with funding pension plans when they have more to gain from their stock options yet will increasingly underfund employee pension funds as their current option wealth increases. Our findings reveal that both effects hold when the CEO has greater power (also occupying board chair) over firm decision making. Our study suggests that there is an ethical dimension to (...) equity incentives, given they are intended to align CEO interests with shareholders, yet potentially incentivize CEO behaviors with adverse consequences for employees. Insights from our findings provide boards and regulators with behavioral levers to protect employee well-being in the context of pension funding. (shrink)

Les professeurs Macey et Miller analysent la relation entre l’assurance des dépôts et l’ inadé quation dans la structure des échéances des actifs et passifs des banques commerciales. Après avoir critiqué l’hypothèse traditionnelle concernant la réglementation, d’après laquelle les banques sont incitées à financer les actifs à long terme par des passifs à court terme parce que l’assurance des dépôts garantie par l’Etat stimule le crédit des banques et subventionne les passifs à court terme, ils utilisent l’analyse économique des décisions (...) publiques pour soutenir qu’une version modifiée de l’hypothèse de la réglementation est la meilleure explication de la déstructuration des échéances des actifs et passifs bancaires.Finalement, ils considèrent que soutenir l’hypothèse de la réglementation n’entraîne pas l’ acceptation du modèle d’assurance des dépôts garantie par l’Etat tel qu’il existe aux Etats-Unis aujourd’hui.Professors Macey and Miller explore the relationship between deposit insurance and the mismatch in the term structure of commercial banks’ assets and liabilities. After criticizing the traditional regulatory hypothesis, which posits that banks have incentives to fund long-term assets with short-term liabilities because government-sponsored deposit insurance enhances bank credit and subsidizes short-term liabilities, they use public choice theory to argue that a modified version of the regulatory hypothesis is the best explanation for the mismatch in the term structure of banks’ assets and liabilities. Finally, they argue that embracing the regulatory hypothesis does not imply acceptance of the government-sponsored deposit insurance scheme as it exists in the U.S. today. (shrink)

Robert Jackall, Street Stories: The World of Police Detectives. Cambridge, MA: Harvard University Press, 2005. 429pp.

The DNA in human cells is continuously undergoing damage as consequences of both endogenous processes and exposure to exogenous agents. The resulting structural changes can be repaired by a number of systems that function to preserve genome integrity. Most pathways are multicomponent, involving incision in the damaged DNA strand and resynthesis using the undamaged strand as a template. In contrast, O6-alkylguanine-DNA alkyltransferase is able to act as a single protein that reverses specific types of alkylation damage simply by removing the (...) offending alkyl group, which becomes covalently attached to the protein and inactivates it. The types of damage that ATase repairs are potentially toxic, mutagenic, recombinogenic and clastogenic. They are generated by certain classes of carcinogenic and chemotherapeutic alkylating agents. There is consequently a great deal of interest in this repair system in relation to both carcinogenesis and cancer chemotherapy. BioEssays 24:255–266, 2002. © 2002 Wiley Periodicals, Inc.; DOI 10.1002/bies.10063. (shrink)

Perception of (and during) events is a necessary feature of any perceptual theory. Norman's dual-process approach cannot account for the perception of events without substantial interactions between the dorsal and ventral systems. These interactions, as outlined by Norman, are highly problematical. The necessity for interactions between the two systems makes the distinction useless.

The model identifies a spatial coordinate frame within which the sensorimotor apparatus produces movement. Its spatial nature simplifies its coupling with spatial reference frames used concurrently by vision and proprioception. While the positional reference frame addresses the performance of spatial tasks, it seems to have little to say about movements involving energy expenditure as the principle component of the task.

Roger Shepard's description of an abstract representational space defined by landmark objects and kinematic transformations between them fails to successfully capture the essence of the perceptual tasks he expects of it, such as object recognition. Ultimately, objects are recognized in the context of events. The dynamic nature of events is what determines the perceived kinematic behavior, and it is at the level of dynamics that events can be classified as types. [Shepard].

Recent research has investigated whether people think of their moral beliefs as objectively true facts about the world, or as subjective preferences. The present research examines variability in the perceived objectivity of different moral beliefs, with respect both to the content of moral beliefs themselves (what they are about), and to the social representation of those moral beliefs (whether other individuals are thought to hold them). It also examines the possible consequences of perceiving a moral belief as objective. With respect (...) to the content of moral beliefs, we find that beliefs about the moral properties of negatively valenced acts are seen as reliably more objective than beliefs about the moral properties of positively valenced acts. With respect to the social representation of moral beliefs, we find that the degree of perceived consensus regarding a moral belief positively influences its perceived objectivity. The present experiments also demonstrate that holding a moral belief to be objective is associated with a more ‘closed’ response in the face of disagreement about it, and with more morally pejorative attributions towards a disagreeing other person. (shrink)

Machery has usefully organized the vast heterogeneity in conceptual representation. However, we believe his argument is too narrow in tacitly assuming that concepts are comprised of only prototypes, exemplars, and theories, and also that its eliminative aspect is too strong. We examine two exceptions to Machery's representational taxonomy before considering whether doing without concepts is a good idea.

Craniotomy as a surgical procedure used in the delivery of a fetus is subject to various moral judgments, some positive and some negative. This article gives consideration to two arguments offered for the moral legitimacy of the craniotomy. Each argument is closely examined and each is found to be flawed and hence inconclusive.

A better understanding of how schistosomes exploit host nutrients, neuro‐endocrine hormones and signalling pathways for growth, development and maturation may provide new insights for improved interventions in the control of schistosomiasis. This paper describes recent advances in the identification and characterisation of schistosome tyrosine kinase and signalling pathways. It discusses the potential intervention value of insulin signalling, which may play an important role in glucose uptake and carbohydrate metabolism in schistosomes, providing the nutrients essential for parasite growth, development and, notably, (...) female fecundity. Significant progress has also been made in the characterisation of other schistosome growth factor receptors, such as transforming growth factor beta receptor and epidermal growth factor receptor, and in our understanding of their roles in the host‐parasite molecular dialogue and parasite development. The use of parasite signal transduction components as novel vaccine or drug targets may prove invaluable in prevention, treatment and control strategies to combat schistosomiasis. (shrink)