The use of head-mounted displays (HMD) for virtual reality (VR) application-based purposes including therapy, rehabilitation, and training is increasing. Despite advancements in VR technologies, many users still experience sickness symptoms. VR sickness may be influenced by technological differences within HMDs such as resolution and refresh rate, however, VR content also plays a significant role. The primary objective of this systematic review and meta-analysis was to examine the literature on HMDs that report Simulator Sickness Questionnaire (SSQ) scores to determine the impact (...) of content. User factors associated with VR sickness were also examined. A systematic search was conducted according to PRISMA guidelines. Fifty-five articles met inclusion criteria, representing 3,016 participants (mean age range 19.5-80; 41% female). Findings show gaming content recorded the highest total SSQ mean 34.26 (95%CI 29.57-38.95). VR sickness profiles were also influenced by visual stimulation, locomotion and exposure times. Older samples (mean age ≥35 years) scored significantly lower total SSQ means than younger samples, however, these findings are based on a small evidence base as a limited number of studies included older users. No sex differences were found. Across all types of content, the pooled total SSQ mean was relatively high 28.00 (95%CI 24.66-31.35) compared with recommended SSQ cut-off scores. These findings are of relevance for informing future research and the application of VR in different contexts. (shrink)

Institutional review board delays may hinder the successful completion of federally funded research in the U.S. military. When this happens, time-sensitive, mission-relevant questions go unanswered. Research participants face unnecessary burdens and risks if delays squeeze recruitment timelines, resulting in inadequate sample sizes for definitive analyses. More broadly, military members are exposed to untested or undertested interventions, implemented by well-intentioned leaders who bypass the research process altogether. To illustrate, we offer two case examples. We posit that IRB delays often appear in (...) the service of managing institutional risk, rather than protecting research participants. Regulators may see more risk associated with moving quickly than risk related to delay, choosing to err on the side of bureaucracy. The authors of this article, all of whom are military-funded researchers, government stakeholders, and/or human subject protection experts, offer feasible recommendations to improv... (shrink)

We argue that thinking of the man-machine comparison in terms of a contest involves, in a reasonable scenario, a criterion of success that is neutral. This is because we want to avoid a petitio principii. We submit, however, that, by looking at things this way, one makes the most essential human things invisible. Thus, in a sense, the contest approach is self-defeating.

Behavioral paternalism raises deep concerns that do not arise in traditional welfare economics. These concerns stem from behavioral paternalism’s acceptance of the defining axioms of neoclassical rationality for normative purposes, despite having rejected them as positive descriptions of reality. We argue that behavioral paternalists have indeed accepted neoclassical rationality axioms as a welfare standard; that economists historically adopted these axioms not for their normative plausibility, but for their usefulness in formal and theoretical modeling; that broadly rational individuals might fail to (...) satisfy the axioms for various reasons, making them unpersuasive as normative criteria; and that even if their violation did constitute irrationality, that would not justify paternalists’ choosing among inconsistent preferences to define an individual’s “true” preferences. (shrink)

Ganghof’s Beyond Presidentialism and Parliamentarianism advances three main claims: an innovative typology of comparative government, introducing the category of semi-parliamentarianism; an explication of two conceptions of majority rule, simple majoritarianism and complex majoritarianism; and a demonstration that there are viable systems of government embodying the political equality associated with each majoritarian conception. This paper explains these claims and identifies issues discussed in this symposium.

In this paper, we show how to construct for a given consistent theory U a $$\varSigma ^0_1$$ Σ 1 0 -predicate that both satisfies the Löb Conditions and the Kreisel Condition—even if U is unsound. We do this in such a way that U itself can verify satisfaction of an internal version of the Kreisel Condition.

Scientism, Enough of That In this paper I argue that it is not a good idea to employ the notion of scientism in public debates concerning issues like free will. Moreover, I claim that, also in philosophy proper, thinking through the notion of scientism is not an urgent task. It is better to reflect directly on notions like justification, evidence, authority of science and the like.

This report is about ethical thinking in the field of health and health care. But it is no abstract philosophical tract. It is designed to be of practical help to those struggling with the complex questions of allocating resources in health care and to encourage a wider involvement at all levels in health debates. The questions it raises stimulate new thinking about today's institutional structures. As we proceeded with our work, we became aware that it is easier to state problems (...) than to solve them. However, we were also aware of the opposite danger of oversimplification implicit in the view that there was a moral calculus to which decisionmakers could turn when they were confronted by an ethical problem in the allocation of resources, and which would yield mechanical solutions to human problems. (shrink)

The study examines the argumentative competencies of people with Asperger syndrome (AS) and compares this with those of normal – or what are called neurotypical (NT) – subjects. To investigate how people with AS recognise, evaluate and engage in argumentation, we have adapted and applied the empirical instrument developed by van Eemeren, Garssen and Meuffels to study the conventional validity of the pragma-dialectical freedom rule (van Eemeren, Gars- sen & Meuffels 2003a; 2003b; 2005a; 2005b; van Eemeren & Meuffels, 2002). Our (...) paper begins with some background information on Asperger syndrome and how it impacts upon communication and argumentation; then it addresses the research questions and methods used; thirdly, it presents some initial findings; finally, it will conclude with some im- plications for those people with AS, for those they come into contact with and for the pragma-dialectic model in general. (shrink)

Situé au carrefour des études culturelles et visuelles (cultural and visual studies), de l’histoire matérielle (material history), de l’histoire du livre et de l’édition, et de la littérature, l’ouvrage publié sous la direction de Ann R. Hawkins et Maura Ives (toutes deux dix-neuvièmistes, spécialistes à la fois de la bibliographie et des women’s studies) regroupe douze études savantes qui brossent un large panorama de la situation littéraire, sociale et symbolique des écrivaines de langue an...

This paper considers critical rationalism under an institutional perspective. It argues that a methodology must be incentive compatible in order to prevail in scientific competition. As shown by a formal game-theoretic model of scientific competition, incentive compatibility requires quality standards that are hereditary: using high-quality research as an input must increase a researcher’s chances to produce high-quality output. Critical rationalism is incentive compatible because of the way it deals with the Duhem-Quine problem. An example from experimental economics illustrates the relevance (...) of the arguments. (shrink)

The essays in this Special Section are about the ethics of Commercialism in Medicine. They are written, for the most part, by bioethicists, with the support of several prominent physicians and a health policy lawyer. This journal is, of course, devoted to ethics. Thus, our intent is to subject the question of commercialism in medicine to ethical scrutiny. Much has been written about commercialism in healthcare but very little about the ethics of commercialism in healthcare. One of our authors, Dr. (...) Jerome Kassirer, has encouraged a national dialogue about these issues. We hope to start that dialogue in the bioethical community and, through that community, into the nation. (shrink)

_This untraditional text is a series of parables, allegories, and prose poems that reflect on the problem of the fragment. Studying the fragment lays the theoretical ground for the basic question of where a text begins and ends._.

Alors que le concept de genre est désormais adopté en France dans presque toutes les disciplines, les premiers ouvrages de synthèse commencent à voir le jour, en sociologie par exemple ou bien en histoire avec ce travail collectif sous la direction de Michèle Riot-Sarcey. Sans être un véritable manuel qui aurait l’ambition d’initier des étudiants aux différents travaux existants, l’ouvrage se révèle néanmoins une très bonne introduction à la puissance heuristique du concept appliqué à l’histo...

Brazilian society has frequently been described as polarized during the country’s recent political and economic crisis. In 2018, a wave of opposition to the centre-left Workers’ Party culminated in the election of Jair Bolsonaro, a right-wing populist who portrays the political left as a malevolent force in Brazilian society. In this paper I explore this polarization through drawing on ethnographic research with the Homeless Workers’ Movement (Movimento de Trablhadores Sem-Teto, MTST), a large urban social movement that develops settlements on underutilized (...) land in the city, and a prominent civil society opponent of Bolsonaro. More specifically, I examine a key site of socio-spatial tension in São Paulo, Paulista Avenue, as a new political right came to predominate on the city’s main thoroughfare during the campaign to impeach the Workers’ Party President, Dilma Rousseff. I show how the perceived intolerance of the mobilized right helped to establish new normative codes that regulated the political symbolism which could be displayed in public spaces. Lastly, I consider how the vilification of the MTST in particular and the political left in general by the new right is embedded in broader structures of stigmatization. (shrink)

In this note we compare propositional logics for closed substitutions and propositional logics for open substitutions in constructive arithmetical theories. We provide a strong example where these logics diverge in an essential way. We prove that for Markov's Arithmetic, that is, Heyting's Arithmetic plus Markov's principle plus Extended Church's Thesis, the logic of closed and the logic of open substitutions are the same.