How do people interleave attention when multitasking? One dominant account is that the completion of a subtask serves as a cue to switch tasks. But what happens if switching solely at subtask boundaries led to poor performance? We report a study in which participants manually dialed a UK-style telephone number while driving a simulated vehicle. If the driver were to exclusively return his or her attention to driving after completing a subtask (i.e., using the single break in the xxxxx-xxxxxx representational (...) structure of the number), then we would expect to see a relatively poor driving performance. In contrast, our results show that drivers choose to return attention to steering control before the natural subtask boundary. A computational modeling analysis shows that drivers had to adopt this strategy to meet the required performance objective of maintaining an acceptable lateral position in the road while dialing. Taken together these results support the idea that people can strategically control the allocation of attention in multitask settings to meet specific performance criteria. (shrink)

Reinforcement learning approaches to cognitive modeling represent task acquisition as learning to choose the sequence of steps that accomplishes the task while maximizing a reward. However, an apparently unrecognized problem for modelers is choosing when, what, and how much to reward; that is, when (the moment: end of trial, subtask, or some other interval of task performance), what (the objective function: e.g., performance time or performance accuracy), and how much (the magnitude: with binary, categorical, or continuous values). In this article, (...) we explore the problem space of these three parameters in the context of a task whose completion entails some combination of 36 state–action pairs, where all intermediate states (i.e., after the initial state and prior to the end state) represent progressive but partial completion of the task. Different choices produce profoundly different learning paths and outcomes, with the strongest effect for moment. Unfortunately, there is little discussion in the literature of the effect of such choices. This absence is disappointing, as the choice of when, what, and how much needs to be made by a modeler for every learning model. (shrink)

We report the results of a dual-task study in which participants performed a tracking and typing task under various experimental conditions. An objective payoff function was used to provide explicit feedback on how participants should trade off performance between the tasks. Results show that participants’ dual-task interleaving strategy was sensitive to changes in the difficulty of the tracking task and resulted in differences in overall task performance. To test the hypothesis that people select strategies that maximize payoff, a Cognitively Bounded (...) Rational Analysis model was developed. This analysis evaluated a variety of dual-task interleaving strategies to identify the optimal strategy for maximizing payoff in each condition. The model predicts that the region of optimum performance is different between experimental conditions. The correspondence between human data and the prediction of the optimal strategy is found to be remarkably high across a number of performance measures. This suggests that participants were honing their behavior to maximize payoff. Limitations are discussed. (shrink)

We test people's ability to optimize performance across two concurrent tasks. Participants performed a number entry task while controlling a randomly moving cursor with a joystick. Participants received explicit feedback on their performance on these tasks in the form of a single combined score. This payoff function was varied between conditions to change the value of one task relative to the other. We found that participants adapted their strategy for interleaving the two tasks, by varying how long they spent on (...) one task before switching to the other, in order to achieve the near maximum payoff available in each condition. In a second experiment, we show that this behavior is learned quickly and remained stable for as long as the payoff function did not change. The results of this work show that people are adaptive and flexible in how they prioritize and allocate attention in a dual-task setting. However, it also demonstrates some of the limits regarding people's ability to optimize payoff functions. (shrink)

Most people who are regular consumers of psychoactive drugs are not drug addicts, nor will they ever become addicts. In neurobiological theories, non-addictive drug consumption is acknowledged only as a “necessary” prerequisite for addiction, but not as a stable and widespread behavior in its own right. This target article proposes a new neurobiological framework theory for non-addictive psychoactive drug consumption, introducing the concept of “drug instrumentalization.” Psychoactive drugs are consumed for their effects on mental states. Humans are able to learn (...) that mental states can be changed on purpose by drugs, in order to facilitate other, non-drug-related behaviors. We discuss specific “instrumentalization goals” and outline neurobiological mechanisms of how major classes of psychoactive drugs change mental states and serve non-drug-related behaviors. We argue that drug instrumentalization behavior may provide a functional adaptation to modern environments based on a historical selection for learning mechanisms that allow the dynamic modification of consummatory behavior. It is assumed that in order to effectively instrumentalize psychoactive drugs, the establishment of and retrieval from a drug memory is required. Here, we propose a new classification of different drug memory subtypes and discuss how they interact during drug instrumentalization learning and retrieval. Understanding the everyday utility and the learning mechanisms of non-addictive psychotropic drug use may help to prevent abuse and the transition to drug addiction in the future. (shrink)

This article discusses the dual interpretation of the Jeffreys-Lindley paradox associated with Bayesian posterior probabilities and Bayes factors, both as a differentiation between frequentist and Bayesian statistics and as a pointer to the difficulty of using improper priors while testing. I stress the considerable impact of this paradox on the foundations of both classical and Bayesian statistics. While assessing existing resolutions of the paradox, I focus on a critical viewpoint of the paradox discussed by Spanos in Philosophy of Science.

Science has needed a dispassionate valuation of psychoactive drugs, but a motivational analysis should be conducted with respect to long-term reward rather than reproductive fitness. Because of hyperbolic overvaluation of short-term rewards, an individual's valuation depends on the time she forms it and the times she will revisit it, sometimes making her best long-term interest lie in total abstinence.

Proposing a change to the view on psychoactive drug use in non-addicts touches a sensitive issue because of its potential implications to addiction prevention, therapeutic practice, and drug policy. Commentators raised nine questions that ranged from clarifications, suggested extensions of the model to supporting data previously not regarded, to assumptions on the implications of the model. Here, we take up the suggestions of the commentators to expand the model to behavioral addictions, discuss additional instrumentalization goals, and review the evidence from (...) laboratory animal studies on drug instrumentalization. We consider further the role of sociocultural factors and individual development in the establishment in drug instrumentalization and addiction. Finally, we clarify which implications we think this model may have. We conclude that drug instrumentalization theory can be further applied to other behaviors but will require a sensitive debate when used for drug and addiction policy that directly affects prevention and treatment. (shrink)

This paper is an extended review of the book Error and Inference, edited by Deborah Mayo and Aris Spanos, about their frequentist and philosophical perspective on testing of hypothesis and on the criticisms of alternatives like the Bayesian approach.

Since the choice of a particular loss function strongly influences the resulting inference, it seems necessary to rely on “intrinsic” losses when no information is available about the utility function of the decision-maker, rather than to call for classical losses like the squared error loss. Since this setting is quite similar to the derivation of noninformative priors in Bayesian analysis, we first recall the conditions of this derivation and deduce from these conditions some requirements on the intrinsic losses. It then (...) appears that these loss functions should only depend on the sampling distribution and that they should be independent of the parameterization of the distribution. The resulting estimators are therefore transformation equivariant. We study the properties of two natural intrinsic losses, namely entropy and Hellinger losses, and show that they can be expressed in closed form for exponential families. Moreover, the entropy loss also provides analytic expressions of Bayes estimators under conjugate priors; the derivation of Bayes estimators associated with the Hellinger loss is more cumbersome, as shown in Poisson and Gamma cases, while leading to similar estimators. (shrink)

Behavioural phenotypes have been explained by genetic and environmental factors (E) and their interaction. Here we suggest a rethinking of the E factor. Passively incurred environmental influences (E pass) and actively copied information and behaviour (E act) may be distinguished at shared and non-shared level. We argue that E act underlies mutation and selection and is the base of gene-independent heritability.

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:The Sound of Two Hands Clapping: The Education of a Tibetan Buddhist MonkChristian P. B. HaskettThe Sound of Two Hands Clapping: The Education of a Tibetan Buddhist Monk. By Georges B. J. Dreyfus. Berkeley: University of California Press, 2003. 445 + xv pp.Georges Dreyfus is a uniquely valuable contributor to the academic study of Tibetan Buddhism. He is the first Westerner to have received the Geshe degree, signifying (...) a thorough mastery of the curriculum of the Geluk (dge lugs) school, and in his latest work, The Sound of Two Hands Clapping, he not only displays the critical acumen produced by that education, but also candidly reveals the personal details of life as a monk in a Buddhist monastic university. This alone should commend this project to the attention of readers seriously interested in Buddhism; however, Dreyfus also gives us a work of scholarship of religion that is exemplary in its capacity to use a single topic as a starting point to explain vast swathes of religion and culture. A brief overview of the chapters precedes my assessment of the book's successes and its importance for Buddhist-Christian studies.The first chapter gives a brief historical overview of Tibetan Buddhism. Those with a passing acquaintance with Tibetan history will find little new information here, but Dreyfus does manage to succinctly and accurately present 1300 years of religious history in a mere fifteen pages. Chapter 2, "Tibetan Monasticism," takes up the context in which most Buddhist scholastic activity occurs, "describing...some of its characteristics and discussing its strengths without hiding its drawbacks" (p.33). Dreyfus moves from a depiction of the Indian precedents and textual foundations of monasticism in general to a discussion of the mass monastic movement in Tibet. His assessment is unsparing but nonjudgmental as he describes monks as tax collectors, ritual actors, priests, and even "punk-monks." In the third chapter "Becoming a Monk," the personal and autobiographical nature of Two Hands Clapping begins to emerge as Dreyfus relates his own personal experience of entering [End Page 192] monastic life interwoven with accounts of both the normative Tibetan standards and the present-day situation of Tibetan monastics. These vivid reports detail the sleep deprivation, poor diet, and rigorous lives of exiled monks, and the genuine affection that those who endure these circumstances feel for one another. This chapter also examines the differing roles of teachers as housemasters, scholastic preceptors, and gurus, and begins introducing several teachers with whom Dreyfus studied. These three chapters comprise the first section, "The Context."Despite the title and cover picture of a debating monk, this book is a study of the full range of scholastic monastic practices. Dreyfus begins his far-ranging comparisons to other religious educational traditions such as yeshivas and medieval European monasticism in the second section, "Tibetan Scholastic Practices." Chapter 4 looks at reading and memorization, considering literacy and education in Tibet first. His discussion of memorization comprises details of memorization practices and a good but not overwhelming discussion of modern psychological theory on memorization and mind. Chapter 5 presents the curriculum followed by Tibetan monks and identifies a key element of scholasticism: commentary. The section on comparative perspective is particularly good, comparing Shi'ite, Christian, and Tibetan models and citing theorists including Foucault and Halbertal to elucidate how commentary is used to create sectarian positions out of shared canonical texts. While the sixth chapter begins by comparing curricula and practices followed by both Ge-luk and non-Ge-luk monasteries, it concludes with a detailed section on the role of scholasticism in the production of authority and orthodox, accounting for the emergence of sectarian divisions within Tibetan Buddhism within a sociopolitical context. This return to the history provided in chapter 1 explains the history of sectarian divisions in Tibet and demonstrates both the centrality and scope of the impact of scholasticism in Tibetan religion. In chapter 7, "Scholasticism and Orality," Dreyfus gives the sort of detailed and nuanced testimony that only a long and careful observer of and participant in Buddhism could. He carefully dissects the role of orality in memorization and recitation on the one hand, and of oral commentary in pedagogy on the... (shrink)

Summary Based on Max Weber's concept of Kulturnation and Hans Blumenberg's project of metaphorology, this essay argues that modern nations follow distinct cultural programmes that are inherent to their national ideas. Each national idea is propagated by a particular biopolitical metaphor, which performs a transfer from practical or scientific ideas about how nature structures and organises life to cultural ideas about how human lives should be socially and politically organised. The essay examines the emergence of the principal metaphors of grafting (...) in England (Great Britain), of regeneration and elective affinities in France, and of organic self-generation in Prussia (Germany). The fact that each nation claims for its particular national idea the status of a universal principle constitutes the intrinsic paradox of nationalism. (shrink)

Gesellschaftliche Veränderungen in grossem Massstab, von der Pluralisierung der Gesellschaft, der Digitalisierung, die als Vierte Kulturtechnik bezeichnet wird, bis hin zur Widerfahrnis von Kontingenzen wie Armut und Flüchtlingsströmen oder Umweltkatastrophen, stellen die Verantwortungsfähigkeit des Menschen vor neue Herausforderungen. Es wird dabei deutlich: Humanität und Vernunft, Würde und Freiheit verdanken ihren Gehalt und ihre Gestalt einem die Vernunft selbst übersteigenden Transzendenten, in dem die Vernunft je und je ihres eigenen Grundes ansichtig werden kann. Dass dieses Verhältnis zwischen Vernunft und ihrem transzendenten (...) Grund alle Wissens- und Lebensbereiche durchdringt, zeigen die interdisziplinären Beiträge dieses Bandes, die Fragen der Weltentstehung und Anthropologie, der Logik und Mystik, des Glaubens und des Gottesbildes, des Sinns und der Religion, der Gottesdienstpraxis und der Architektur behandeln. (shrink)

The drug-reinforcement theory explains why humans get engaged in drug taking behavior. This theory posits that drugs of abuse serve as biological rewards by activating the reinforcement system. Although from a psychological and neurobiological perspective this theory is extremely helpful, it does not tell us about the drug-taking motives and motivation of an individual. The definition of drug instrumentalization goals will improve our understanding of individual drug-taking profiles.

The use of coercive measures in the care for the addicted has changed over the past 20 years. Laws that have adopted the “dangerousness” criterion in order to secure patients’ rights to non-intervention are increasingly subjected to critique as many authors plead for wider dangerousness criteria. One of the most salient moral issues at stake is whether addicts who are at risk of causing danger to themselves should be involuntarily admitted and/or treated. In this article, it is argued that the (...) dilemma between coercion on the one hand and abandonment on the other cannot be analysed without differentiated perspectives on the key notions that are used in these debates. The ambiguity these notions carry within care practice indicates that the conflict between the prevention of danger and respect for autonomy is not as sharp as the legal systems seem to imply. Some coercive measures need not be interpreted as an infringement of autonomy—rather, they should be interpreted as a way to provide good care. (shrink)

We argue and demonstrate that an emphasis on outperforming others may lead to perverse effects. Four studies show that assigning other-referenced performance goals, relative to self-referenced mastery goals, may lead to more interpersonally harmful behavior in an information exchange context. Results of Study 1 indicate that assigned performance goals lead to stronger thwarting behavior and less accurate information giving to an exchange partner than assigned mastery goals. Similarly, in Study 2 performance goal individuals more subtly deceived highly competent opponents relative (...) to lowly competent opponents, who received more blatant treatment. Finally, Studies 3 and 4 show in methodologically complementary ways that tactical deception considerations may account for the interpersonally harmful behavior of performance goal individuals. (shrink)

We argue and demonstrate that an emphasis on outperforming others may lead to perverse effects. Four studies show that assigning other-referenced performance goals, relative to self-referenced mastery goals, may lead to more interpersonally harmful behavior in an information exchange context. Results of Study 1 indicate that assigned performance goals lead to stronger thwarting behavior and less accurate information giving to an exchange partner than assigned mastery goals. Similarly, in Study 2 performance goal individuals more subtly deceived highly competent opponents relative (...) to lowly competent opponents, who received more blatant treatment. Finally, Studies 3 and 4 show in methodologically complementary ways that tactical deception considerations may account for the interpersonally harmful behavior of performance goal individuals. (shrink)

Les décisions politiques sur les risques environnementaux complexes font fréquemment intervenir des éléments scientifiques contestés. Il n’y a généralement pas de « faits » qui conduisent à une politique correcte unique. Les éléments de preuve qui sont intégrés dans les avis scientifiques destinés à une décision politique nécessitent une évaluation de leur qualité. En 2003, l’Agence néerlandaise d’évaluation environnementale a adopté une méthode standardisée, désignée sous le nom de « guide », dans le cadre de laquelle les principaux aspects de (...) la production et de l’utilisation des connaissances sont présentés grâce à une liste de contrôle visant à l’évaluation et à la communication des incertitudes. Dans cet article, nous présentons des résultats de l’application de ce guide à la controverse sur les risques des particules en suspension. La délibération active sur l’incertitude dans un contexte d’expertise entraîne un processus d’apprentissage commun entre les experts et les décideurs politiques, ce qui conduit à une meilleure prise de conscience du phénomène d’incertitude et de ses implications politiques.Policy decisions on complex environmental risks often involve disputed science. Typically, there are no “ facts” to support a single unequivocally correct policy. The evidence provided in scientific studies for policy-making decisions requires high-quality assessment. In 2003, the Netherlands Environmental Assessment Agency adopted a standardized method, referred to as “guidelines”, whereby key quality aspects of knowledge production and use are presented in the form of a checklist for uncertainty assessments and communication. In this article, we present the outcomes of applying the guidelines in controversies on the risks of ambient particulate matter. In the policy–advisory context, active deliberation on uncertainty produces a common learning process for advisors and policy makers, which leads to a deeper understanding and increased awareness of the phenomenon of uncertainty and its policy implications. (shrink)

Arguably, the religious use of hallucinogenic drugs stems from a human search of metaphysical insight rather than from a direct need for cognitive, emotional, social, physical, or sexual improvement. Therefore, the sacramental and spiritual intake of hallucinogenic drugs goes so far beyond other biopsychosocial functions that it deserves its own category in the drug instrumentalization list.

Mass media ethics and the classical liberal ideal of the autonomous individual are historically linked and professionally dominant--yet the authors of this work feel this is intrinsically flawed. They show how recent research in philosophy and social science--together with a longer tradition in theological inquiry--insist that community, mutuality, and relationship are fundamental to a full concept of personhood. The authors argue that "persons-in-community" provides a more defensible grounding for journalists' professional moral decision-making in crucial areas such as truthtelling, privacy, organizational (...) culture, and balanced coverage. With numerous examples drawn from life as well as from theory, this book will interest journalists, editors, and professionals in media management as well as students and scholars of media ethics, reporting, and media law. (shrink)

The aim of this research was to gain insight into the experiences and perspectives of individual members of a Medical Research Ethics Committee regarding their individual roles and possible tensions within and between these roles. We conducted a qualitative interview study among members of a large MREC, supplemented by a focus group meeting. Respondents distinguish five roles: protector, facilitator, educator, advisor and assessor. Central to the role of protector is securing valid informed consent and a proper risk-benefit analysis. The role (...) of facilitator implies that respondents want to think along with and assist researchers in order to help medical science progress. As educators, the respondents want to raise ethical and methodological awareness of researchers. The role of advisor implies that respondents bring in their own expertise. The role of assessor points to contributing to the overall evaluation of the research proposal. Various tensions were identified within and between roles. Within the role of protector, a tension is experienced between paternalism and autonomy. Between the role of protector and facilitator tensions occur when the value of a study is questioned while risks and burdens for the subjects are negligible. Within the role of assessor, a tension is felt between the implicit nature of judgments and the need for more explicit formulations. Awareness of various roles and responsibilities may prevent one-sided views on MREC work, not only by members themselves, but also by researchers. Tensions within and between the roles require reflection by MREC members. (shrink)

The aim of this research was to gain insight into the experiences and perspectives of individual members of a Medical Research Ethics Committee regarding their individual roles and possible tensions within and between these roles. We conducted a qualitative interview study among members of a large MREC, supplemented by a focus group meeting. Respondents distinguish five roles: protector, facilitator, educator, advisor and assessor. Central to the role of protector is securing valid informed consent and a proper risk-benefit analysis. The role (...) of facilitator implies that respondents want to think along with and assist researchers in order to help medical science progress. As educators, the respondents want to raise ethical and methodological awareness of researchers. The role of advisor implies that respondents bring in their own expertise. The role of assessor points to contributing to the overall evaluation of the research proposal. Various tensions were identified within and between roles. Within the role of protector, a tension is experienced between paternalism and autonomy. Between the role of protector and facilitator tensions occur when the value of a study is questioned while risks and burdens for the subjects are negligible. Within the role of assessor, a tension is felt between the implicit nature of judgments and the need for more explicit formulations. Awareness of various roles and responsibilities may prevent one-sided views on MREC work, not only by members themselves, but also by researchers. Tensions within and between the roles require reflection by MREC members. (shrink)

Three experts in media ethics reexamine ethical behaviour in news gathering and reporting. The book combines a wide range of real-life and hypothetical examples of ethical dilemmas in news reporting with a thoughtful critique of the underlying individualistic theories of mainstream media ethics.

Organizational deviance represents a costly behavior to many organizations. While some precursors to deviance have been identified, we hope to add to our predictive capabilities. Utilizing social cognitive theory and psychological contract theory as explanatory concepts, we explore the role of moral disengagement and turnover intentions, testing our hypotheses using two samples: a sample of 44 nurses from a hospital system in the Southwestern United States (Study 1), and a sample of 52 working adults collected from an online survey system (...) (Study 2). Results strongly supported our hypotheses in both samples, indicating that the self-regulatory deactivation inherent in moral disengagement led to increased organizational deviance; effects that were much more pronounced when turnover intentions were high. Our findings support the increased role of cognition in determining behavior when environmental pressures stemming from the psychological contract have been altered, leading to a number of theoretical and practical implications, particularly in industries with high turnover rates. (shrink)

Background: Discussing treatment risks has become increasingly important in medical communication. Still, despite regulations, physicians must decide how much and what kind of information to present. Objective: To investigate patients’ preference for information about a small risk of a complication of colonoscopy, and whether medical and personal factors contribute to such preference. To propose a disclosure policy related to our results. Design: Vignettes study. Setting: Department of Gastroenterology, Academic Medical Centre, the Netherlands. Patients: 810 consecutive colonoscopy patients. Intervention: A home-sent (...) questionnaire containing three vignettes. Vignettes varied in the indication for colonoscopy, complication severity and level of risk. Patients were invited to indicate their wish to be informed and the importance of such information. In addition, sociodemograhic, illness-related and psychological characteristics were assessed. Main outcome measurements: Wish to be informed and importance of information. Results: Of 810 questionnaires, 68% were returned. Patients generally wished to be informed about low-risk complications, regardless of the indication for colonoscopy or the severity of the complication. The level of risk did matter, though (OR = 2.48, SE = 0.28, p = 0.001). The information was considered less important if done for population screening purposes or diagnosis of colon cancer, if the complication was less severe (bleeding) and if the risk was smaller (0.01% and 0.1%). Patients’ information preference was also related to age, mood and coping style. Limitations: Difficulty of vignettes. Conclusions: Patients generally wish to be informed about all possible risks. However, this might become uninformative. A stepwise approach is suggested. (shrink)

This study was designed to investigate the trust relationship between parents and teachers in first grade. Additional research questions were whether trust was related to ethnicity and reading performance. The five facets of trust; benevolence, reliability, competence, honesty and openness, were measured on a 4-point Likert scale. Reading performance was measured by the three-minute test. Parents were found to have more trust in the reliability, competence and honesty of teachers than teachers in parents. Native-Dutch and immigrant parents have the same (...) trust level towards their children?s teacher. However, teachers reported lower trust levels on all five facets of trust for immigrant parents. Our findings indicated that ethnicity has no influence on parents trust in teachers, but ethnicity may explain teachers? trust in parents. Some support was found for the assumption that teachers? trust plays a role in reading performance. Children were found to have higher reading performance when teachers reported higher trust in the benevolence and openness of parents. (shrink)