It has recently been argued that a person’s moral judgments (about both their own and others’ actions) are constrained by the nature and extent of their relevant ignorance and, thus, that such judgments are determined in the first instance by the person’s epistemic circumstances. It has been argued, in other words, that the epistemic is logically prior to other normative (e.g., ethical, prudential, pecuniary) considerations in human decision-making, that these other normative considerations figure in decision-making only after (logically and temporally) (...) relevant ignorance has constrained the decision-maker’s menu of options. If this is right, then a person’s moral judgments in some set of circumstances should vary with their knowledge and ignorance of these circumstances. In this study, we test the hypothesis of the logical priority of the epistemic. We describe two experiments in which subjects’ knowledge and ignorance of relevant consequences were manipulated. In the second experiment, we also compared the effect of ignorance on moral judgments with that of personal force, a factor previously shown to influence moral judgments. We found broad empirical support for the armchair arguments that epistemic considerations are logically prior to normative considerations. (shrink)

Seeing, Doing, and Knowing: A Philosophical Theory of Sense Perception MOHAN MATTHEN New York, Oxford University Press, 2007384 pages, ISBN: 0199204284 (pbk); $35.00Mohan Matthen's Seeing, Doing an...

Multiple Originals: New Approaches to Hebrew Bible Textual Criticism. By Gary D. Martin. SBL Text-Critical Studies, vol. 7. Atlanta: Society of Biblical Literature, 2010. Pp. xiv + 341. $42.95.

Over the past several decades, scholars of liberal and democratic theory have shown a heightened interest in the role that various virtues might play in promoting the good/free society. Yet within this recent "return" to the virtues, one quality that has been almost entirely left out of the discussion is humility. In this essay, I critically address this lacuna and offer a defense of a particular form of humility, what I call democratic humility. After considering a range of moral and (...) political objections to the concept of humility, Iprovide an account that seeks to address some of these long-standing difficulties while arguing that the idea of humility, recuperated as an ethos of civic attentiveness, may be one of the most important virtues for late-modern societies marked by ethical and cultural pluralism. (shrink)

Do men and women perceive cybercrime types differently? This article draws on the distinction between socio-economic and psychosocial cybercrime proposed by Lazarus (2019) to investigate whether men and women hold different perceptions of digital crimes across these two dimensions. Informed by the synergy between feminist theory and the Tripartite Cybercrime Framework (TCF), our survey examined respondents’ differential perceptions of socio-economic cybercrime (online fraud) and psychosocial cybercrime (cyberbullying, revenge porn, cyberstalking, online harassment) among men and women in the United Kingdom. The (...) results revealed that women considered psychosocial cybercrime worse than men. Conversely, we found no differences between men and women with regard to socio-economic cybercrime. The article concludes that psychosocial cybercrimes are more gendered than socio-economic cybercrime, suggesting problems with the meaning of ‘cyber-enabled crimes’, and substantiating the synergy between the TCF and feminist perspectives. (shrink)

How do tweets reflect the long-standing disparities between the northern and southern regions of Nigeria? This study presents a qualitative analysis of Twitter users' responses (n = 101,518) to the tweets of the Economic and Financial Crimes Commission (EFCC) regarding the production and prosecution of cybercrime. The article uses postcolonial perspectives to shed light on the legacies of British colonial efforts in Nigeria, such as the amalgamation of the northern and southern protectorates in 1914. The results revealed significant discrepancies between (...) Nigeria's northern and southern regions regarding cybercriminal arrest, conviction, and sentencing. Specifically, the results showed that the EFCC's criminalization of Southerners differs substantially from that of Northerners. The contemporary manifestation of inequalities concerning the production and prosecution of cybercrime on Twitter reflects long-standing contestations (e.g., economic, political, cultural, geological) between the northern and southern parts of Nigerian society. Therefore, since the North-South divide in present-day Nigeria originated from British colonization, colonialism is the base that shaped the superstructure comprising political, religious, historical, geological (e.g., crude oil), and economic factors. In turn, the article spotlights that regional differences in educational attainment, originating from differing experiences of Christianization and colonization, interact with regional disparities in the production of cybercrime. More research is required to better understand how these contextual disparities in society interact with the production and prosecution of cybercrime, given that Nigerian cybercriminals defraud victims all over the world. (shrink)

This article is about the manifestations of similarities between two seemingly distinct groups of Nigerians: cybercriminals and politicians. Which linguistic strategies do Twitter users use to express their opinions on cybercriminals and politicians? The study undertakes a qualitative analysis of ‘engaged’ tweets of an elite law enforcement agency in West Africa. We analyzed and coded over 100,000 ‘engaged’ tweets based on a component of mechanisms of moral disengagement (i.e., advantageous comparison), a linguistic device. The results reveal how respondents defend the (...) actions of online fraudsters (“the deviant group”) by strategically comparing them to the wrongful acts of corrupt politicians (“the respectable group”). Similarly, the results show how respondents positioned this linguistic strategy to compare “the powerless group” (online fraudsters) and “the powerful group” (politicians) in society. Indeed, tweet responses suggest that the Economic and Financial Crimes Commission (EFCC) generally looks downwards for culprits (i.e., online fraudsters) while ignoring fraudulent politicians. We conclude that the process by which some actions are interpreted as a crime compared to others is a moral enterprise. (shrink)

"Explores the concept of the social contract and how it shapes citizenship. Argues that the modern social contract is an account of the ethical and cultural conditions upon which modern citizenship depends"--Provided by publisher.

The idea of the social contract has typically been seen in political theory as legitimating the exercise of governmental power and creating the moral basis for political order. Mark Button wants to draw our attention to an equally crucial, but seldom emphasized, role for the social contract: its educative function in cultivating the habits and virtues that citizens need to fulfill the promises that the social contract represents. In this book, he retells the story of social contract theory (...) as developed by some of its major proponents—Hobbes, Locke, Rousseau, and Rawls—highlighting this constructive feature of the theory in order to show that not only do citizens make the social contract, but the social contract also makes citizens. Button’s interest in recovering this theme from past political theory is not merely historical, however. He means to resurrect our concern for it so that we can better understand the political-institutional and cultural-ethical conditions necessary for balancing individual freedom and common citizenship in our modern world of moral pluralism. Drawing on the history of public reason, Button shows how political justification continues to depend upon an ethics of character formation and why this matters for citizens today. (shrink)

Nineteenth-century American political thinkers like Emerson, Thoreau, and Whitman advocated for and sought to exemplify a life of self-direction and critical self-reflection, or personal autonomy, as a means of contesting entrenched routines of democratic-capitalist normalization and as a way of resisting a host of institutional disciplinary pressures. Today, the ideal of personal autonomy within a diverse liberal society is branded by many as a form of “comprehensive” disciplinary normalization in its own right. In this essay I offer a reconsideration of (...) this reversal in the appraisal of the value of autonomy within pluralistic democratic societies and argue that the abandonment of autonomy is a symptom of a mistaken understanding of the personal-ethical qualities upon which a democratic culture depends and a maladaptive concession to neoliberal norms. To confront these challenges, I draw upon a range of Emerson’s writings to offer some ideas about how a reconstructed ideal of aspirational autonomy might inform contemporary politics without unduly constraining moral pluralism or undermining toleration. (shrink)

This paper investigates the semantic treatment of conditional obligation, explicit permission (often called positive permission), and prohibition based on models with agents and branched time. In such models branches (rather than moments) are taken as basic, and the branching provides a way to represent the indeterminism which is normally presupposed by talk of free will, responsibility, action and ability. Careful treatment of the relation between ability and responsibility avoids many common problems with accounts of conditional obligation. Recognition of the generality (...) often involved in conditional obligations makes possible a sensitive way of expressing some kinds of general prohibitions, which in turn makes it possible to account for the special role of explicit permission. (shrink)

Ethics for OCR Religious Studies: The Complete Resource for AS and A2 is the perfect guide for students taking AS and A2 courses in the OCR GCE Religious Studies specification. Ethics for OCR provides a rigorous and accessible introduction to both historical and contemporary ethical debates. Drawing on insights from recent examiners’ reports and mark schemes, and following the OCR course outline closely, Mark Coffey and Dennis Brown’s landmark book includes: - Up-to-date discussions of key debates in (...) religious ethics - Ethical theories set in their historical context - Attention given to contemporary developments in law, science, technology, and society - A thorough guide to writing the perfect exam answer - A detailed exposition of OCR’s assessment criteria and how best to meet them - Profiles of leading ethical, philosophical and religious thinkers, a chapter by chapter glossary, and helpful chapter summaries - Discussion points, activity boxes and past paper questions The most comprehensive book on the market, Ethics for OCR Religious Studies provides a rigorous and accessible introduction to both historical and contemporary ethical debates, including chapters on sexual and environmental and business ethics. Written with verve and clarity, the book’s user-friendly style and attention to detail will help students of all abilities to achieve their best. (shrink)

This essay is concerned with the challenges that moral " blind spots " create for the presence and endurance of democratic virtues under conditions of pluralism. A moral blind spot refers to the occlusions in individual moral perceptions and the limits that circumscribe moral sympathies owing to our ineluctable partialities as socially embedded beings. Blind spots constitute a tragic feature of human perception and moral judgment that facilitate and undermine human agency at once. Yet, far more problematic from the perspective (...) of democratic epistemology and normative ethics is the denial or willful forgetfulness of their place in our individual and collective lives, and the concomitant failure to account for moral blind spots so as to check their most pernicious effects. Accounting for moral blind spots in practice requires actively planning for their presence through the cultivation of the "pathos of distance" towards ourselves and our collective political identities and social institutions. (shrink)

This experiment examined the effects of three elements comprising Jones' (1991) moral intensity construct, (social consensus, personal proximity, and magnitude of consequences) in a cross-cultural comparison of ethical decision making within a human resource management (HRM) context. Results indicated social consensus had the most potent effect on judgments of moral concern and judgments of immorality. An analysis of American, Eastern European, and Indonesian responses also indicted socio-cultural differences were moderated by the type of HRM ethical issue. In addition, individual differences (...) in personal ethical ideology (relativism and idealism) varied reliably with moral judgments after controlling for issue characteristics and socio-cultural background. (shrink)

The history of mechanics has been extensively investigated in a number of historical works. The full story from the Greeks and medievals through the Scientific Revolution to the modern era is long and complex. But it is also incomplete. Studies to date have been admirably thorough in putting empirical discoveries into proper perspective and in making clear the great importance of mathematical innovations. But there has been surprisingly little regard for the role of thought experiments in the development of mechanics. (...) We attempt to rectify this, at least in part. After a brief account of Greek ideas of space and motion, we focus on late medieval and early modern physics, especially the development of inertial motion. In particular, we examine the thought experiments of Buridan, Oresme, and Galileo, which did so much to undermine Aristotle’s account of motion and lead the way to the modern concept of inertia. (shrink)

2009 Massachusetts Institute of Technology All rights reserved. No part of this book may ... ISBN 978-0-262-01324-6 (hardcover : alk. paper)— ISBN 978-0-262 -51304-3 (pbk. : alk. paper) 1. Science— Political aspects. 2. Science and state. 3 .

For most of the history of prejudice research, negativity has been treated as its emotional and cognitive signature, a conception that continues to dominate work on the topic. By this definition, prejudice occurs when we dislike or derogate members of other groups. Recent research, however, has highlighted the need for a more nuanced and “inclusive” (Eagly 2004) perspective on the role of intergroup emotions and beliefs in sustaining discrimination. On the one hand, several independent lines of research have shown that (...) unequal intergroup relations are often marked by attitudinal complexity, with positive responses such as affection and admiration mingling with negative responses such as contempt and resentment. Simple antipathy is the exception rather than the rule. On the other hand, there is mounting evidence that nurturing bonds of affection between the advantaged and the disadvantaged sometimes entrenches rather than disrupts wider patterns of discrimination. Notably, prejudice reduction interventions may have ironic effects on the political attitudes of the historically disadvantaged, decreasing their perceptions of injustice and willingness to engage in collective action to transform social inequalities.These developments raise a number of important questions. Has the time come to challenge the assumption that negative evaluations are inevitably the cognitive and affective hallmarks of discrimination? Is the orthodox concept of prejudice in danger of side-tracking, if not obstructing, progress towards social justice in a fuller sense? What are the prospects for reconciling a prejudice reduction model of change, designed to get people to like one another more, with a collective action model of change, designed to ignite struggles to achieve intergroup equality? (shrink)

There is a current debate about if, and in what sense, machine learning systems used in the medical context need to be explainable. Those arguing in favor contend these systems require post hoc explanations for each individual decision to increase trust and ensure accurate diagnoses. Those arguing against suggest the high accuracy and reliability of the systems is sufficient for providing epistemic justified beliefs without the need for explaining each individual decision. But, as we show, both solutions have limitations—and it (...) is unclear either address the epistemic worries of the medical professionals using these systems. We argue these systems do require an explanation, but an institutional explanation. These types of explanations provide the reasons why the medical professional should rely on the system in practice—that is, they focus on trying to address the epistemic concerns of those using the system in specific contexts and specific occasions. But ensuring that these institutional explanations are fit for purpose means ensuring the institutions designing and deploying these systems are transparent about the assumptions baked into the system. This requires coordination with experts and end-users concerning how it will function in the field, the metrics used to evaluate its accuracy, and the procedures for auditing the system to prevent biases and failures from going unaddressed. We contend this broader explanation is necessary for either post hoc explanations or accuracy scores to be epistemically meaningful to the medical professional, making it possible for them to rely on these systems as effective and useful tools in their practices. (shrink)

Understanding individual differences in cognitive performance is an important part of understanding how variations in underlying cognitive processes can result in variations in task performance. However, the exploration of individual differences in the components of the decision process—such as cognitive processing speed, response caution, and motor execution speed—in previous research has been limited. Here, we assess the heritability of the components of the decision process, with heritability having been a common aspect of individual differences research within other areas of cognition. (...) Importantly, a limitation of previous work on cognitive heritability is the underlying assumption that variability in response times solely reflects variability in the speed of cognitive processing. This assumption has been problematic in other domains, due to the confounding effects of caution and motor execution speed on observed response times. We extend a cognitive model of decision‐making to account for relatedness structure in a twin study paradigm. This approach can separately quantify different contributions to the heritability of response time. Using data from the Human Connectome Project, we find strong evidence for the heritability of response caution, and more ambiguous evidence for the heritability of cognitive processing speed and motor execution speed. Our study suggests that the assumption made in previous studies—that the heritability of cognitive ability is based on cognitive processing speed—may be incorrect. More generally, our methodology provides a useful avenue for future research in complex data that aims to analyze cognitive traits across different sources of related data, whether the relation is between people, tasks, experimental phases, or methods of measurement. (shrink)

A higher order potential analysis of moral status clarifies the issues that divide Human Being Theorists who oppose embryo research from Person Theorists who favor embryo research. Higher order potential personhood is transitive if it is active, identity preserving and morally relevant. If the transition from the Second Order Potential of the embryo to the First Order Potential of an infant is transitive, opponents of embryo research make a powerful case for the moral status of the embryo. If it is (...) intransitive, then the Person Theorist can draw lines between levels of moral status that permit embryo research to proceed. (shrink)

Debates over the politicization of science have led some to claim that scientists have or should have a “right to research.” This article examines the political meaning and implications of the right to research with respect to different historical conceptions of rights. The more common “liberal” view sees rights as protections against social and political interference. The “republican” view, in contrast, conceives rights as claims to civic membership. Building on the republican view of rights, this article conceives the right to (...) research as embedding science more firmly and explicitly within society, rather than sheltering science from society. From this perspective, all citizens should enjoy a general right to free inquiry, but this right to inquiry does not necessarily encompass all scientific research. Because rights are most reliably protected when embedded within democratic culture and institutions, claims for a right to research should be considered in light of how the research in question contributes to democracy. By putting both research and rights in a social context, this article shows that the claim for a right to research is best understood, not as a guarantee for public support of science, but as a way to initiate public deliberation and debate about which sorts of inquiry deserve public support. (shrink)

What is a right? Why do we say that individual humans have rights? Do humans have a unique moral status or do other living beings also have rights? Can animals ever be moral agents? Is there a tension between the animal rights movement and those whose see the environment as possessing some manner of rights? With Grace Clement, Bonnie Brown, and Mark Parascondola.

Reviews the book "Science, Truth, and Democracy," by Philip Kitcher.

The somatic integration definition of life is familiar from the debate on the determination of death, with some bioethicists arguing that it supports brain death while others argue that some brain‐dead bodies exhibit sufficient somatic integration for biological life. I argue that on either interpretation, the somatic integration definition of life implies that neither the preimplantation embryo nor the postimplantation embryo meet the somatic integration threshold condition for organismal human life. The earliest point at which a somatic integration determination of (...) life could be made would be the beginning of the fetal stage, 9 weeks postfertilization. Bioethical implications are considered, specifically with respect to the moral status of the postimplantation embryo in embryo research and abortion. (shrink)

Philip Kitcher is a leading figure in the philosophy of science, and he is part of a growing community of scholars who have turned their attention from the field’s long-time focus on questions of logic and epistemology to the relation between science and society. Kitcher’s book Science, Truth, and Democracy (2001) charted a course between relativism and realism, arguing that the aims of science emerge from not only scientific curiosity but also practical and public concerns. The book also drew on (...) John Rawls’s A Theory of Justice (1999) to develop an ideal of “well-ordered science,” and then applied the ideal to various aspects of the scientific research agenda. Ten years later, complex public issues like climate change have grown more urgent, and with many people questioning mainstream science on climate change, evolutionary biology, vaccines, stem cell research, and other topics, the tensions between science and democracy seem more pronounced than ever. Kitcher’s Science in a Democrat. (shrink)

Moral status ascribes equal obligations and rights to individuals on the basis of membership in a protected group. Substance change is an event that results in the origin or cessation of individuals who may be members of groups with equal moral status. In this paper, two substance changes that affect the moral status of human embryos are identified. The first substance change begins with fertilization and ends with the formation of the blastocyst, a biological individual with moral status comparable to (...) that ascribed to human organs. The second substance change begins at implantation and ends late in embryological development with the formation of the human body, an organism with moral status as a human being. The bioethical implications of each substance change are explored. The Two Substance Change theory is contrasted with continuity theories, which recognize no substance change in embryological development and with fertilization-only substance change theories. (shrink)

Many commentators today lament the politicization of bioethics, but some suggest distinguishing among different kinds of politicization. This essay pursues that idea with reference to three traditions of political thought: liberalism, communitarianism, and republicanism. After briefly discussing the concept of politicization itself, the essay examines how each of these political traditions manifests itself in recent bioethics scholarship, focusing on the implications of each tradition for the design of government bioethics councils. The liberal emphasis on the irreducible plurality of values and (...) interests in modern societies, and the communitarian concern with the social dimensions of biotechnology, offer important insights for bioethics councils. The essay finds the most promise in the republican tradition, however, which emphasizes institutional mechanisms that allow bioethics councils to enrich but not dominate public deliberation, while ensuring that government decisions on bioethical issues are publicly accountable and contestable. (shrink)

The basic bimodal systemK/K can be interpreted as an analysis of the logic of ability developed in [1]. Where in [1] we would express the claimI can bring it about that P using the formula, with its non-normal operator, we will now use the formula. Here is a normal alethic possibilitation operator.is a normal necessitation operator, but it is independent of, and not subject to an alethic interpretation. Rather, is interpreted to meanI bring it about that P. The result is (...) a simplification and clarification of a combined logic of ability and action like that in [2], but employing only normal operators.A number of extensions of the basic systemK/K are constructed, first by strengthening the two normal sublogics independently and then by linking the two sublogics via axiom schemata involving both operators. The result is a series of increasingly strong systems which more and more adequately fulfill our expectations for a satisfactory logic of action and ability. (shrink)

Efforts to develop a coherent role for white people in racial justice initiatives in the USA are often stymied by the defensiveness, paternalism, and guilt of many white liberals. Such efforts are also undermined by critiques of whiteness that conflate white identity and white supremacy. I address this dilemma by developing an account of antiracist white identity politics, conceived of here as taking responsibility for the effects of being socially defined as white. I locate conceptual resources for this project in (...) James Baldwin’s reflections on tragedy, love, and identity. In contrast to those who invoke Baldwin to argue for abolishing white identity, I make a case for politicizing it. I draw on Baldwin’s articulation of a tragic sensibility to argue that white antiracism requires accepting a morally compromised identity one has not chosen. It also requires accepting that serious efforts to end white supremacy inevitably lead to mistakes, misunderstandings, and counterproductive outcomes. By adopting a tragic perspective on these aspects of white antiracism, white people would become more capable of forging antiracist white identities through robust engagement in struggles for racial justice. (shrink)

If personal identity consists in non-branching psychological continuity, then the sharp breaks in psychological connectedness characteristic of Multiple Personality Disorder implicitly commit psychological continuity theories to a metaphysically extravagant reification of alters. Animalist theories of personal identity avoid the reification of alternate personalities by interpreting multiple personality as a failure to integrate alternative autobiographical memory schemata. In the normal case, autobiographical memory cross-classifies a human life, and in so doing provides access to a variety of interpretative frameworks with their associated (...) clusters of general event memory and episodic memory. Multiples exhibit erratic behavior because they cannot access reliably the intersecting autobiographical memory schemata that permit graceful transitions between social roles, behavioral repertoire and emotional dispositions. Selves, in both normal and certain pathological cases, are best understood as semi-fictional narratives created by human animals to serve their social, emotional and physical needs. (shrink)

The recent move to naturalize phenomenology through a mathematical protocol is a significant advance in consciousness research. It enables a new and fruitful level of dialogue between the cognitive sciences and phenomenology of such a nuanced kind that it also prompts advancement in our phenomenological analyses. But precisely what is going on at this point of ‘dialogue’ between phenomenological descriptions and mathematical algorithms, the latter of which are based on dynamical systems theory? It will be shown that what is happening (...) is something more than a mere ‘passing of the baton’ from phenomenology to mathematics. For this sophisticated naturalization to prove a worthy endeavour it must produce more than just correlation, it must prove some form of interrelation to the extent that phenomenology is deterministic. But such interrelational and deterministic requirements are the start of a slippery slope, and it will be argued that this slope only loses more friction once a further demand of formal and precise descriptions is made of phenomenology. Such deterministic and formally precise demands misconstrue phenomenology’s ideal goal of a unification of genuine/originary reason and truth. Not a deductive and definitive discipline, phenomenology is rather from the outset descriptive and critical. Phenomenology’s descriptive beginnings will thus be employed as an essential barrier to the naturalization of phenomenology. (shrink)

This research applies the impression management theory of exemplification in an accounting study by identifying and measuring differences in both auditor and public perceptions of exemplary behaviors. The auditors were divided into two groups, one of which reported self-perceptions (A-S) while the other group reported their perceptions of a typical auditor (A-O). There were two separate public groups, which gave their perceptions of a typical auditor and were divided based on their levels of accounting sophistication. The more sophisticated public group (...) was comprised of bank loan officers (LO) while the less sophisticated public group consisted of investment club members (IC). Comparisons were made on 30 behaviors contained in the AICPA Code of Professional Conduct, which served as the basis for the research instrument. Profile analysis, a special form of MANOVA technique, was used to analyze the results. A-S perceptions were the highest of the four treatment levels and were significantly higher (i.e., more exemplary) than the perceptions of both the A-O and LO groups. The more sophisticated user group (LO) provided the lowest perceptions of the four treatment levels. For at least four of the six measures, the LO treatment group perceived the typical auditor to be less exemplary than both the IC and A-O treatments. There were no differences in perceptions between the A-O group and IC. Additional analysis revealed that auditors overrated the degree to which the public relied on financial statements. However, both public groups reported a reasonably high level of reliance on financial statements when making decisions. (shrink)

Direct reprogramming of human skin cells makes available a source of pluripotent stem cells without the perceived evil of embryo destruction, but the advent of such a powerful biotechnology entangles stem cell research in other forms of moral complicity. Induced pluripotent stem cell (iPSC) research had its origins in human embryonic stem cell research and the projected biomedical applications of iPS cells almost certainly will require more embryonic stem cell research. Policies that inhibit iPSC research in order to avoid moral (...) complicity are themselves complicit in preventable harms to patients. Moral complicity may be unavoidable, but a Blue Ribbon Panel charged with assessing the need for additional embryonic stem cell lines may ease a transition from embryonic stem cell research to clinical applications of iPS cells. (shrink)

For decisions between many alternatives, the benchmark result is Hick's Law: that response time increases log-linearly with the number of choice alternatives. Even when Hick's Law is observed for response times, divergent results have been observed for error rates—sometimes error rates increase with the number of choice alternatives, and sometimes they are constant. We provide evidence from two experiments that error rates are mostly independent of the number of choice alternatives, unless context effects induce participants to trade speed for accuracy (...) across conditions. Error rate data have previously been used to discriminate between competing theoretical accounts of Hick's Law, and our results question the validity of those conclusions. We show that a previously dismissed optimal observer model might provide a parsimonious account of both response time and error rate data. The model suggests that people approximate Bayesian inference in multi-alternative choice, except for some perceptual limitations. (shrink)