The Ultimatum Game is commonly interpreted as a two-person bargaining game. The third person who donates and may withdraw the money is not included in the theoretical equations, but treated like a neutral measurement instrument. Yet in a cross-cultural analysis it seems necessary to consider the possibility that the thoughts of a player – strategic, altruistic, selfish, or concerned about reputation – are influenced by both an anonymous second player and the non-anonymous experimenter.

Axiomatic rationality is defined in terms of conformity to abstract axioms. Savage limited axiomatic rationality to small worlds, that is, situations in which the exhaustive and mutually exclusive set of future states S and their consequences C are known. Others have interpreted axiomatic rationality as a categorical norm for how human beings should reason, arguing in addition that violations would lead to real costs such as money pumps. Yet a review of the literature shows little evidence that violations are actually (...) associated with any measurable costs. Limiting axiomatic rationality to small worlds, I propose a naturalized version of rationality for situations of intractability and uncertainty, all of which are not in. In these situations, humans can achieve their goals by relying on heuristics that may violate axiomatic rationality. The study of ecological rationality requires formal models of heuristics and an analysis of the structures of environments these can exploit. It lays the foundation of a moderate naturalism in epistemology, providing statements about heuristics we should use in a given situation. Unlike axiomatic rationality, ecological rationality can explain less-is-more effects, formalize when one should move from ‘is’ to ‘ought,’ and be evaluated by goals beyond coherence, such as predictive accuracy, frugality, and efficiency. Ecological rationality can be seen as a formalization of means–end instrumentalist rationality, based on Herbert Simon’s insight that rational behavior is a function of the mind and its environment. (shrink)

This volume collects Gigerenzer's recent articles on the psychology of rationality. This volume should appeal, like the earlier volumes, to a broad mixture of cognitive psychologists, philosophers, economists, and others who study decision making.

This article argues that criminal justice and health institutions under settler colonialism collude to create and sustain “truths” about First Nations lives that often render them as “bare life,” to use the term of Giorgio Agamben. First Nations peoples’ existence is stripped to its sheer biological fact of life and their humanity denied rights and dignity. First Nations people remain in a “state of exception” to the legal order and its standards of care. Zones of exception place First Nations people (...) in a separate and diminished legal order. Medical and health agencies have been instrumental in shaping colonial “biopower,” both in and beyond carceral settings to ensure that First Nations lives are managed in accordance with the colonial settler state project. This project is able both to threaten First Nations rights to live and to maintain settler self-perceptions of decency and care. We illustrate this discussion with reference to the tragic and unnecessary deaths in custody of twenty-two-year-old Yamatji woman Ms Dhu in 2014 in South Hedland Police Station, Western Australia, and twenty-six-year-old Dunghutti man David Dungay Jnr in Long Bay jail in Sydney, NSW, in 2015. Health professionals and police demonstrated callous disregard to Ms Dhu and Mr Dungay—treating them as “bare life.”. (shrink)

Heuristics are efficient cognitive processes that ignore information. In contrast to the widely held view that less processing reduces accuracy, the study of heuristics shows that less information, computation, and time can in fact improve accuracy. We review the major progress made so far: the discovery of less-is-more effects; the study of the ecological rationality of heuristics, which examines in which environments a given strategy succeeds or fails, and why; an advancement from vague labels to computational models of heuristics; the (...) development of a systematic theory of heuristics that identifies their building blocks and the evolved capacities they exploit, and views the cognitive system as relying on an “adaptive toolbox;” and the development of an empirical methodology that accounts for individual differences, conducts competitive tests, and has provided evidence for people’s adaptive use of heuristics. Homo heuristicus has a biased mind and ignores part of the available information, yet a biased mind can handle uncertainty more efficiently and robustly than an unbiased mind relying on more resource-intensive and general-purpose processing strategies. (shrink)

Simple Heuristics That Make Us Smart invites readers to embark on a new journey into a land of rationality that differs from the familiar territory of cognitive science and economics. Traditional views of rationality tend to see decision makers as possessing superhuman powers of reason, limitless knowledge, and all of eternity in which to ponder choices. To understand decisions in the real world, we need a different, more psychologically plausible notion of rationality, and this book provides it. It is about (...) fast and frugal heuristics--simple rules for making decisions when time is pressing and deep thought an unaffordable luxury. These heuristics can enable both living organisms and artificial systems to make smart choices, classifications, and predictions by employing bounded rationality. But when and how can such fast and frugal heuristics work? Can judgments based simply on one good reason be as accurate as those based on many reasons? Could less knowledge even lead to systematically better predictions than more knowledge? Simple Heuristics explores these questions, developing computational models of heuristics and testing them through experiments and analyses. It shows how fast and frugal heuristics can produce adaptive decisions in situations as varied as choosing a mate, dividing resources among offspring, predicting high school drop out rates, and playing the stock market. As an interdisciplinary work that is both useful and engaging, this book will appeal to a wide audience. It is ideal for researchers in cognitive psychology, evolutionary psychology, and cognitive science, as well as in economics and artificial intelligence. It will also inspire anyone interested in simply making good decisions. (shrink)

The Empire of Chance tells how quantitative ideas of chance transformed the natural and social sciences, as well as daily life over the last three centuries. A continuous narrative connects the earliest application of probability and statistics in gambling and insurance to the most recent forays into law, medicine, polling and baseball. Separate chapters explore the theoretical and methodological impact in biology, physics and psychology. Themes recur - determinism, inference, causality, free will, evidence, the shifting meaning of probability - but (...) in dramatically different disciplinary and historical contexts. In contrast to the literature on the mathematical development of probability and statistics, this book centres on how these technical innovations remade our conceptions of nature, mind and society. Written by an interdisciplinary team of historians and philosophers, this readable, lucid account keeps technical material to an absolute minimum. It is aimed not only at specialists in the history and philosophy of science, but also at the general reader and scholars in other disciplines. (shrink)

Cognitive Science, Volume 46, Issue 7, July 2022.

Together, these collected papers develop the idea that human thinking - from scientific creativity to simply understanding what a positive HIV test means - "happens" partly outside the mind.".

Artificial intelligence (AI) is the ability of a digital computer or computer-controlled robot to perform tasks commonly associated with intelligent beings. Artificial intelligence can be both a blessing and a curse, and potentially a double-edged sword if not carefully wielded. While it holds massive potential benefits to humans—particularly in healthcare by assisting in treatment of diseases, surgeries, record keeping, and easing the lives of both patients and doctors, its misuse has potential for harm through impact of biases, unemployment, breaches of (...) privacy, and lack of accountability to mention a few. In this article, we discuss the fourth industrial revolution, through a focus on the core of this phenomenon, artificial intelligence. We outline what the fourth industrial revolution is, its basis around AI, and how this infiltrates human lives and society, akin to a transcendence. We focus on the potential dangers of AI and the ethical concerns it brings about particularly in developing countries in general and conflict zones in particular, and we offer potential solutions to such dangers. While we acknowledge the importance and potential of AI, we also call for cautious reservations before plunging straight into the exciting world of the future, one which we long have heard of only in science fiction movies. (shrink)

Humans and animals make inferences about the world under limited time and knowledge. In contrast, many models of rational inference treat the mind as a Laplacean Demon, equipped with unlimited time, knowledge, and computational might. Following H. Simon's notion of satisficing, the authors have proposed a family of algorithms based on a simple psychological mechanism: one-reason decision making. These fast and frugal algorithms violate fundamental tenets of classical rationality: They neither look up nor integrate all information. By computer simulation, the (...) authors held a competition between the satisficing "Take The Best" algorithm and various "rational" inference procedures. The Take The Best algorithm matched or outperformed all competitors in inferential speed and accuracy. This result is an existence proof that cognitive mechanisms capable of successful performance in the real world do not need to satisfy the classical norms of rational inference. (shrink)

Can the general public learn to deal with risk and uncertainty, or do authorities need to steer people’s choices in the right direction? Libertarian paternalists argue that results from psychological research show that our reasoning is systematically flawed and that we are hardly educable because our cognitive biases resemble stable visual illusions. For that reason, they maintain, authorities who know what is best for us need to step in and steer our behavior with the help of “nudges.” Nudges are nothing (...) new, but justifying them on the basis of a latent irrationality is. In this article, I analyze the scientific evidence presented for such a justification. It suffers from narrow logical norms, that is, a misunderstanding of the nature of rational thinking, and from a confirmation bias, that is, selective reporting of research. These two flaws focus the blame on individuals’ minds rather than on external causes, such as industries that spend billions to nudge people into unhealthy behavior. I conclude that the claim that we are hardly educable lacks evidence and forecloses the true alternative to nudging: teaching people to become risk savvy. (shrink)

Research practice is too often shaped by routines rather than reflection. The routine of sampling subjects, but not stimuli, is a case in point, leading to unwarranted generalizations. It likely originated out of administrative rather than scientific concerns. The routine of sampling subjects and testing their averages for significance is reinforced by delusions about its meaningfulness, including the replicability delusion.

What counts as human rationality: reasoning processes that embody content-independent formal theories, such as propositional logic, or reasoning processes that are well designed for solving important adaptive problems? Most theories of human reasoning have been based on content-independent formal rationality, whereas adaptive reasoning, ecological or evolutionary, has been little explored. We elaborate and test an evolutionary approach, Cosmides' social contract theory, using the Wason selection task. In the first part, we disentangle the theoretical concept of a “social contract” from that (...) of a “cheater-detection algorithm”. We demonstrate that the fact that a rule is perceived as a social contract — or a conditional permission or obligation, as Cheng and Holyoak proposed — is not sufficient to elicit Cosmides' striking results, which we replicated. The crucial issue is not semantic, but pragmatic: whether a person is cued into the perspective of a party who can be cheated. In the second part, we distinguish between social contracts with bilateral and unilateral cheating options. Perspective change in contracts with bilateral cheating options turns P & not-Q responses into not-P & Q responses. The results strongly support social contract theory, contradict availability theory, and cannot be accounted for by pragmatic reasoning schema theory, which lacks the pragmatic concepts of perspectives and cheating detection. (shrink)

Acting classes and theatre education have long been framed as activities during which children can learn skills that transfer outside the acting classroom. A growing empirical literature provides evidence for acting classes’ efficacy in teaching vocabulary, narrative, empathy, theory of mind, and emotional control. Yet these studies have not been based in what is actually happening in the acting classroom, nor on what acting teachers report as their pedagogical strategies. Instead, previous work has been unsystematic and fragmented in its measured (...) transfer outcomes, and absent mechanistic explanation. Expanding research on this topic requires more grounding in teachers’ beliefs about the acting classes they teach, as well as observation of the classes themselves. As a first step, we surveyed 173 acting teachers online, asking them about the activities within acting classes they believed caused change in their students, as well as which outcomes they believed were changed as a result of acting classes. Teachers taught across educational levels (elementary to professional) and had a variety of training in teaching acting. Overall, teachers rated almost every activity within classes as important for and causing impact on students, and almost every outcome as being positively influenced as a result of acting class. When forced to rank order outcomes, teachers focused on collaboration, communication, creativity, confidence, and empathy as most likely to change. Teachers rated importance of class activities and outcomes differently depending on what level they taught. This study shows the difficulty of surveying highly motivated teachers, given the globally high rankings, but also proposes candidate psychological skills likely to change as a result of acting classes, and the mechanistic behaviors that may cause change. (shrink)

Negative self-referential processing has fruitfully been studied in unipolar depressed patients, but remarkably less in patients with bipolar disorder (BD). This exploratory study examines the relation between task-based self-referential processing and depressive symptoms in BD and their possible importance to the working mechanism of mindfulness-based cognitive therapy (MBCT) for BD. The study population consisted of a subsample of patients with BD (n = 49) participating in an RCT of MBCT for BD, who were assigned to MBCT + TAU (n = (...) 23) or treatment as usual (TAU) (n = 26). Patients performed the self-referential encoding task (SRET), which measures (1) positive and (2) negative attributions to oneself as well as (3) negative self-referential memory bias, before and after MBCT + TAU or TAU. At baseline, all three SRET measures were significantly related to depressive symptoms in patients with BD. Moreover, repeated measures analyses of variance revealed that negative self-referential memory bias diminished over time in the MBCT + TAU group, compared with the TAU group. Given the preliminary nature of our findings, future research should explore the possibly mediating role of reducing negative self-referential memory bias in preventing and treating depressive symptoms in BD through MBCT. (shrink)

The paper shows why and how an empirical study of fast-and-frugal heuristics can provide norms of good reasoning, and thus how (and how far) rationality can be naturalized. We explain the heuristics that humans often rely on in solving problems, for example, choosing investment strategies or apartments, placing bets in sports, or making library searches. We then show that heuristics can lead to judgments that are as accurate as or even more accurate than strategies that use more information and computation, (...) including optimization methods. A standard way to defend the use of heuristics is by reference to accuracy-effort trade-offs. We take a different route, emphasizing ecological rationality (the relationship between cognitive heuristics and environment), and argue that in uncertain environments, more information and computation are not always better (the “less-can-be-more” doctrine). The resulting naturalism about rationality is thus normative because it not only describes what heuristics people use, but also in which specific environments one should rely on a heuristic in order to make better inferences. While we desist from claiming that the scope of ecological rationality is unlimited, we think it is of wide practical use. (shrink)

What is the nature of moral behavior? According to the study of bounded rationality, it results not from character traits or rational deliberation alone, but from the interplay between mind and environment. In this view, moral behavior is based on pragmatic social heuristics rather than moral rules or maximization principles. These social heuristics are not good or bad per se, but solely in relation to the environments in which they are used. This has methodological implications for the study of morality: (...) Behavior needs to be studied in social groups as well as in isolation, in natural environments as well as in labs. It also has implications for moral policy: Only by accepting the fact that behavior is a function of both mind and environmental structures can realistic prescriptive means of achieving moral goals be developed. (shrink)

A physician's lack of humanity is a general complaint in public surveys. The physician-patient relationship is viewed by the public as being reduced to a business relationship where the patient feels that she is merely a 'client' and the physician a healthcare 'practitioner' instead of a 'care giver'. This public perception is not a phenomenon that is peculiar to Lebanon. Yet, the problem has been increasing over the years to the extent that patients feel that physicians are becoming inhumane and (...) business oriented. While this might not characterize all physicians of the 21 st century, this might be true of at least some. Responses were collected from a study that was undertaken based on a questionnaire distributed to a pool of 650 participants from different geographical areas and different social and educational backgrounds in Lebanon. Participants were all older than18 years and mentally competent. None were physicians. The questionnaire was open-ended and initially piloted among a random sample. The physician traits most desired by the public were found to be: moral traits (41%), interpersonal traits (36%), scientific traits (19%) and other (4%). The most unwanted traits/behaviours were a lack of interpersonal traits (57%), a lack of moral traits (40%) and a lack of scientific skills (3%). The physician-patient relationship was perceived, in general, as being a flawed one. What can be done to remedy the image of the Lebanese physician that has been projected in the minds of the patients and the public at large? Nine major recommendations are presented. (shrink)

Termination of pregnancy (TOP) is offered in many countries, for foetuses prenatally diagnosed with congenital malformations that are deemed incompatible with life or that are associated with a high morbidity. In Lebanon, a middle income country where religion plays a focal role, the law prohibits any form of TOP unless it is the only means to save the mother's life. It is the contention of the authors of this article that even if the foetus is a person, if it were (...) medically revealed that there is a substantial risk that the newborn will suffer severe physical abnormalities that will cause it to be seriously handicapped; it is morally acceptable to terminate the pregnancy. Hence, TOP carried out for these indications is justified in the interest of the foetus and the child. Whatever the status of the foetus is, once born, it will become a full-fledged sentient being with all that this entails. When given the option of starting an existence, this person-to-be has the right to a minimum that allows him/her to enjoy a relatively good quality of life. Today, Lebanese obstetricians are confronted with the burden placed on them under the law to refuse TOP, or, when performing them, to forge records or deny having done them. This is why we strongly believe that the Lebanese policy on abortion should be amended. (shrink)

Unlike behaviorism, cognitive psychology relies on mental concepts to explain behavior. Yet mental processes are not directly observable and multiple explanations are possible, which poses a challenge for finding a useful framework. In this article, I distinguish three new frameworks for explanations that emerged after the cognitive revolution. The first is called tools‐to‐theories: Psychologists' new tools for data analysis, such as computers and statistics, are turned into theories of mind. The second proposes as‐if theories: Expected utility theory and Bayesian statistics (...) are turned into theories of mind, describing an optimal solution of a problem but not its psychological process. The third studies the adaptive toolbox (formal models of heuristics) that describes mental processes in situations of uncertainty where an optimal solution is unknown. Depending on which framework researchers choose, they will model behavior in either situations of risk or of uncertainty, and construct models of cognitive processes or not. The frameworks also determine what questions are asked and what kind of data are generated. What all three frameworks have in common, however, is a clear preference for formal models rather than explanations by general dichotomies or mere verbal concepts. The frameworks have considerable potential to inform each other and to generate points of integration. (shrink)

The terms nested sets, partitive frequencies, inside-outside view, and dual processes add little but confusion to our original analysis (Gigerenzer & Hoffrage 1995; 1999). The idea of nested set was introduced because of an oversight; it simply rephrases two of our equations. Representation in terms of chances, in contrast, is a novel contribution yet consistent with our computational analysis System 1.dual process theory” is: Unless the two processes are defined, this distinction can account post hoc for almost everything. In (...) contrast, an ecological view of cognition helps to explain how insight is elicited from the outside (the external representation of information) and, more generally, how cognitive strategies match with environmental structures. (shrink)

Philosophy can enhance communication among new forms of knowledge, existing ones, and those that will arise in light of the heuristic possibilities of the revolutions in science, technology, and thought; it can turn to a reevaluation of all of the culture that humanity has produced for its own welfare and can prevent the loss of the differentiating essences of diverse social groups. In the conjugation of the forms of knowledge, I am interested in the relationship that has emerged between specialized (...) scientific knowledge and ordinary knowledge, between the tradition, religion, art, and the evaluation of all that has previously been treated by philosophy. But if there is one discipline that I regard as privileged because of its effect on human actions, it is political science: public policy can provide a basis for planetary consciousness, a concern for mankind and for its potential destruction. The role of political philosophy is to serve as an ideological guide for a political science that would comprehend political behavior in relation to its consequences for individual human beings and would thus support actions favorable to humanity. (shrink)

An overview of the latest interdisciplinary research on human morality, capturing moral sensibility as a sophisticated integration of cognitive, emotional, and motivational mechanisms. Over the past decade, an explosion of empirical research in a variety of fields has allowed us to understand human moral sensibility as a sophisticated integration of cognitive, emotional, and motivational mechanisms shaped through evolution, development, and culture. Evolutionary biologists have shown that moral cognition evolved to aid cooperation; developmental psychologists have demonstrated that the elements that underpin (...) morality are in place much earlier than we thought; and social neuroscientists have begun to map brain circuits implicated in moral decision making. This volume offers an overview of current research on the moral brain, examining the topic from disciplinary perspectives that range from anthropology and neurophilosophy to justice and law. The contributors address the evolution of morality, considering precursors of human morality in other species as well as uniquely human adaptations. They examine motivations for morality, exploring the roles of passion, extreme sacrifice, and cooperation. They go on to consider the development of morality, from infancy to adolescence; findings on neurobiological mechanisms of moral cognition; psychopathic immorality; and the implications for justice and law of a more biological understanding of morality. These new findings may challenge our intuitions about society and justice, but they may also lead to more a humane and flexible legal system. Contributors Scott Atran, Abigail A. Baird, Nicolas Baumard, Sarah Brosnan, Jason M. Cowell, Molly J. Crockett, Ricardo de Oliveira-Souza, Andrew W. Delton, Mark R. Dadds, Jean Decety, Jeremy Ginges, Andrea L. Glenn, Joshua D. Greene, J. Kiley Hamlin, David J. Hawes, Jillian Jordan, Max M. Krasnow, Ayelet Lahat, Jorge Moll, Caroline Moul, Thomas Nadelhoffer, Alexander Peysakhovich, Laurent Prétôt, Jesse Prinz, David G. Rand, Rheanna J. Remmel, Emma Roellke, Regina A. Rini, Joshua Rottman, Mark Sheskin, Thalia Wheatley, Liane Young, Roland Zahn. (shrink)

Every day, students from marginalized communities disproportionately face adversity and trauma. It is well documented that exposure to adverse childhood experiences can impact children's ability to focus, learn, and even regulate their emotions. Many schools, rather than providing multi-tiered systems of support to address the root causes of behavior, place these students at greater risk of experiencing health disparities through the use of exclusionary school discipline practices. ESDs not only deny students important educational opportunities, but also can compound existing social, (...) economic, and health inequities. Thus, ESD practices must be understood as more than simply impacting what happens in the classroom. Instead, they should be conceptualized as public health policies with far-reaching impacts on a child's lifelong health and well-being. Even though school discipline has largely been overlooked by the public health community, current reform efforts are one aspect of a holistic health justice framework.This article seeks to begin to bridge current gaps in the literature and public discourse by identifying key linkages between ESD practices and health. It then presents evidence-based design principles to ensure education policy is aligned with a health justice framework. And finally, it explores a specific school-based intervention, restorative justice. (shrink)

This book provides a comprehensive overview of critical approaches to questions in qualitative research. Written using examples from actual research and course work, this volume helps students and researchers learn to interrogate and inquire against the grain. For use by anyone doing qualitative research in Education, _Critical Approaches to Questions in Qualitative Research_ teaches that questions are tools for decision making in the research process. With exercises, sample questions, and outlines for planning research, this volume teaches readers to ask questions (...) that confront prevailing assumptions leading to an analysis, dismantling and uncovering of omissions and invisiblities. (shrink)

Over the last 80 years, a major goal of medical educators has been to improve the quality of applicants to medical school and, hence, the resulting doctors. To do this, academic standards have been progressively strengthened. The Medical College Admission Test (MCAT) in the United States and the undergraduate science grade point average (GPA) have long been correlated with success in medical school, and graduation rates have been close to 100 percent for many years. Recent studies have noted that some (...) doctors having difficulties in practice were found to have had similar problems while in school. In this essay, we present a brief historical account of attitudes and approaches to admissions requirements, then discuss basic broad areas of accomplishment in clinical practice: academic mastery, clinical acumen, and professionalism. We then review data that suggest that lack of competency can often be detected very early in a student’s career and may or may not be immune to remediation efforts. We end with a recommendation for a course of action that upholds and fulfills the profession’s social responsibility. This will be a moral argument, defending an aggressive but equitable approach to maintaining both public accountability and trust. (shrink)

Bioethics is a relatively new addition to bedside medical care in Arab world which is characterized by a special culture that often makes blind adaptation of western ethics codes and principles; a challenge that has to be faced. To date, the American University of Beirut Medical Center is the only hospital that offers bedside ethics consultations in the Arab Region aiming towards better patient-centered care. This article tackles the role of the bedside clinical ethics consultant as an active member of (...) the medical team and the impact of such consultations on decision-making and patient-centered care. Using the case of a child with multiple medical problems and a futile medical condition, we describe how the collaboration of the medical team and the clinical ethics consultant took a comprehensive approach to accompany and lead the parents and the medical team in their decision-making process and how the consultations allowed several salient issues to be addressed. This approach proved to be effective in the Arab cultural setting and indeed did lead to better patientcentered care. (shrink)

How can anyone be rational in a world where knowledge is limited, time is pressing, and deep thought is often an unattainable luxury? Traditional models of unbounded rationality and optimization in cognitive science, economics, and animal behavior have tended to view decision-makers as possessing supernatural powers of reason, limitless knowledge, and endless time. But understanding decisions in the real world requires a more psychologically plausible notion of bounded rationality. In Simple heuristics that make us smart (Gigerenzer et al. 1999), (...) we explore fast and frugal heuristics – simple rules in the mind's adaptive toolbox for making decisions with realistic mental resources. These heuristics can enable both living organisms and artificial systems to make smart choices quickly and with a minimum of information by exploiting the way that information is structured in particular environments. In this précis, we show how simple building blocks that control information search, stop search, and make decisions can be put together to form classes of heuristics, including: ignorance-based and one-reason decision making for choice, elimination models for categorization, and satisficing heuristics for sequential search. These simple heuristics perform comparably to more complex algorithms, particularly when generalizing to new data – that is, simplicity leads to robustness. We present evidence regarding when people use simple heuristics and describe the challenges to be addressed by this research program. Key Words: adaptive toolbox; bounded rationality; decision making; elimination models; environment structure; heuristics; ignorance-based reasoning; limited information search; robustness; satisficing; simplicity. (shrink)

Whenever psychologists, neuroscientists, or philosophers draw conclusions about moral judgments in general from a small selected sample, they assume that moral judgments are unified by some common and peculiar feature that enables generalizations and makes morality worthy of study as a unified field. We assess this assumption by considering the six main candidates for a unifying feature: content, phenomenology, force, form, function, and brain mechanisms. We conclude that moral judgment is not unified on any of these levels and that moral (...) science should adopt a more fine-grained taxonomic approach that studies carefully defined groups of moral judgments. (shrink)

Mind and environment evolve in tandem—almost a platitude. Much of judgment and decision making research, however, has compared cognition to standard statistical models, rather than to how well it is adapted to its environment. The author argues two points. First, cognitive algorithms are tuned to certain information formats, most likely to those that humans have encountered during their evolutionary history. In par ticular, Bayesian computations are simpler when the information is in a frequency format than when it is in a (...) probability format. The author investigates whether fre quency formats can make physicians reason more often the Bayesian way. Second, cognitive algorithms need to operate under constraints of limited time, knowledge, and computational power, and they need to exploit the structures of their environments. The author describes a fast and frugal algorithm, Take The Best, that violates standard principles of rational inference but can be as accurate as sophisticated "optimal" mod els for diagnostic inference. Key words: Bayes' theorem; bounded rationality; infor mation format; probabilistic reasoning; satisficing; training; medical education. (shrink)