Discrete choice experiments—selecting the best and/or worst from a set of options—are increasingly used to provide more efficient and valid measurement of attitudes or preferences than conventional methods such as Likert scales. Discrete choice data have traditionally been analyzed with random utility models that have good measurement properties but provide limited insight into cognitive processes. We extend a well-established cognitive model, which has successfully explained both choices and response times for simple decision tasks, to complex, multi-attribute discrete choice data. The (...) fits, and parameters, of the extended model for two sets of choice data (involving patient preferences for dermatology appointments, and consumer attitudes toward mobile phones) agree with those of standard choice models. The extended model also accounts for choice and response time data in a perceptual judgment task designed in a manner analogous to best–worst discrete choice experiments. We conclude that several research fields might benefit from discrete choice experiments, and that the particular accumulator-based models of decision making used in response time research can also provide process-level instantiations for random utility models. (shrink)

While tourism's positive contributions to societies have long been debated, commerce based tourism activities can strengthen peaceful societies by adhering to sustainable tourism principles. This study utilizes content analysis to examine 136 tourism practices from four major awards programs for their contributions to sustainability and peace. Specific practices which illuminate each of these contributions are highlighted. The findings reveal the most common initiatives focus on environmental quality, economic development, and community nourishment efforts, with substantially less focus on initiatives to engage (...) citizen diplomacy and increase transparency. The use of awards programs to further sustainable tourism is discussed, and suggestions for future research in this important area of study are shared. (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)

A study is reported testing two hypotheses about a close parallel relation between indicative conditionals, if A then B , and conditional bets, I bet you that if A then B . The first is that both the indicative conditional and the conditional bet are related to the conditional probability, P(B|A). The second is that de Finetti's three-valued truth table has psychological reality for both types of conditional— true , false , or void for indicative conditionals and win , lose (...) , or void for conditional bets. The participants were presented with an array of chips in two different colours and two different shapes, and an indicative conditional or a conditional bet about a random chip. They had to make judgements in two conditions: either about the chances of making the indicative conditional true or false or about the chances of winning or losing the conditional bet. The observed distributions of responses in the two conditions were generally related to the conditional probability, supporting the first hypothesis. In addition, a majority of participants in further conditions chose the third option, “void”, when the antecedent of the conditional was false, supporting the second hypothesis. (shrink)

The new paradigm in the psychology of reasoning adopts a Bayesian, or prob- abilistic, model for studying human reasoning. Contrary to the traditional binary approach based on truth functional logic, with its binary values of truth and falsity, a third value that represents uncertainty can be introduced in the new paradigm. A variety of three-valued truth table systems are available in the formal literature, including one proposed by de Finetti. We examine the descriptive adequacy of these systems for natural language (...) indicative condi- tionals and bets on conditionals. Within our framework the so-called “defective” truth table, in which participants choose a third value when the antecedent of the indicative conditional is false, becomes a coherent response. We show that only de Finetti’s system has a good descriptive fit when uncer- tainty is the third value. (shrink)

Pedro Abelardo apresenta na sua obra uma teoria da virtude de natureza, à primeira vista, aristotélica. Ao que parece, essa concepção também contém diferentes elementos estoicos, que não se opõem necessariamente à visão do Estagirita. Todavia, o essencial da interpretação da Escola do Pórtico acerca da virtude difere da explicação dada por Aristóteles. No presente estudo, pretendemos examinar, primeiro, a índole da virtude como habitus na obra de lógica de Abelardo. Nesse caso, não há dúvida de que predomina a influência (...) aristotélica. Em seguida, indicamos outras particularidades da virtude encontradas, desta vez, em tratados éticos e teológicos do nosso protagonista, as quais se revelam antes de caráter estoico. Em suma, projetamos identificar as diferentes fontes antigas e os principais intermediários latinos usados por Abelardo para elaborar a sua própria teoria da virtude. Trata-se de deixar clara a influência filosófica dominante em Abelardo sobre essa questão da virtude, já que este lógico não pode harmonizar teses substancialmente inconciliáveis. Peter Abelard in his work presents a theory of virtue, which is, at first sight, of Aristotelian nature. It seems that this view also contains different Stoic elements, but they are not necessarily opposed to Stagirite's vision. However, the essentials of the Stoa School about virtue differ from the explanation given by Aristotle. In this paper, we intend to examine, first, the nature of virtue as habitus in Abelard's work on logic. In this case, there is no doubt that Aristotle's influence on this topic predominates. Next, we specify other features related to virtue found, this time, in ethical and theological treatises of our protagonist that appear to be basically Stoic. In short, we want to identify the different ancient sources and the main Latin mediators used by Abelard to elaborate his own theory of virtue. In other words, we would like to shed light on the predominant philosophical authority on Abelard's theory of virtue since this logician cannot harmonize theses that are fundamentally irreconcilable. (shrink)

El filósofo francés Alain Guy (La Rochelle, 1918 - Narbonne, 1998) dedicó por entero su vida al estudio de la filosofía española e hispanoamericana, dándola a conocer no sólo en el extranjero sino también en nuestro país.

Psychological research on people’s understanding of natural language connectives has traditionally used truth table tasks, in which participants evaluate the truth or falsity of a compound sentence given the truth or falsity of its components in the framework of propositional logic. One perplexing result concerned the indicative conditional if A then C which was often evaluated as true when A and C are true, false when A is true and C is false but irrelevant“ (devoid of value) when A is (...) false (whatever the value of C). This was called the “psychological defective table of the conditional.” Here we show that far from being anomalous the “defective” table pattern reveals a coherent semantics for the basic connectives of natural language in a trivalent framework. This was done by establishing participants’ truth tables for negation, conjunction, disjunction, conditional, and biconditional, when they were presented with statements that could be certainly true, certainly false, or neither. We review systems of three-valued tables from logic, linguistics, foundations of quantum mechanics, philosophical logic, and artificial intelligence, to see whether one of these systems adequately describes people’s interpretations of natural language connectives. We find that de Finetti’s (1936/1995) three-valued system is the best approximation to participants’ truth tables. (shrink)

Since its origin bioethics has been a specialized, academic discipline, focussing on moral issues, using a vast set of globalized principles and rational techniques to evaluate and guide healthcare practices. With the emergence of a plural society, the loss of faith in experts and authorities and the decline of overarching grand narratives and shared moralities, a new approach to bioethics is needed. This approach implies a shift from an external critique of practices towards embedded ethics and interactive practice improvement, and (...) from a legal defence of rights towards fostering interdependent practices of responsibility. This article describes these transitions within bioethics in relation to the broader societal and cultural dynamics within Western societies, and traces the implications for the methodologies and changing roles of the bioethicist. The bioethicist we foresee is not just a clever expert but also a relationally sensitive person who engages stakeholders in reciprocal dialogues about their practice of responsibility and helps to integrate various sorts of knowledge (embodied, experiential, visual, and cognitive-scientific). In order to illustrate this new approach, we present a case study. It concerns a project focusing on an innovation in elderly care, based on the participation of various stakeholders, especially older people themselves. (shrink)

This paper responds to the commentaries from Stacy Carter and Alan Cribb. We pick up on two main themes in our response. First, we reflect on how the process of setting standards for empirical bioethics research entails drawing boundaries around what research counts as empirical bioethics research, and we discuss whether the standards agreed in the consensus process draw these boundaries correctly. Second, we expand on the discussion in the original paper of the role and significance of the concept of (...) ‘integrating’ empirical methods and ethical argument as a standard for research practice within empirical bioethics. (shrink)

Peter Abelard’s (1079-1142) conception of moral sin contains a fundamental element from Stoicism, which is the notion of “consent” (consensus). After the presentation of the essentials of that Abelardian theory, we return to the source of that same idea in ancient and imperial Stoicism. According to their main representatives, “consent” or “assent” (sugkata/qesij) has a determining function not only in ethics, but also in the process of knowledge as well. We emphasize in passing the resemblance between some important components of (...) Stoic epistemology and the theory expounded by Aristotle in the Posterior Analytics on the origin of knowledge. Augustine represents without any doubt one of the main intermediaries through whom this notion of consent is transmitted up to the time of Abelard in the 12th century. Even if he was influenced by the Bishop of Hippo on moral questions in general, Abelard seems to distance himself from Augustine by considering that consent is more a rational matter than a volitional one. (shrink)