Humans routinely modify their walking speed to adapt to functional goals and physical demands. However, damage to the central nervous system often results in abnormal modulation of walking speed and increased risk of falls. There is considerable interest in treatment modalities that can provide safe and salient training opportunities, feedback about walking performance, and that may augment less reliable sensory feedback within the CNS after injury or disease. Fully immersive virtual reality technologies show benefits in boosting training-related gains in walking (...) performance; however, they lack views of the real world that may limit functional carryover. Augmented reality and mixed reality head-mount displays provide partially immersive environments to extend the virtual reality benefits of interacting with virtual objects but within an unobstructed view of the real world. Despite this potential advantage, the feasibility of using MR-HMD visual feedback to promote goal-directed changes in overground walking speed remains unclear. Thus, we developed and evaluated a novel mixed reality application using the Microsoft HoloLens MR-HMD that provided real-time walking speed targets and augmented visual feedback during overground walking. We tested the application in a group of adults not living with disability and examined if they could use the targets and visual feedback to walk at 85%, 100%, and 115% of each individual’s self-selected speed. We examined whether individuals were able to meet each target gait speed and explored differences in accuracy across repeated trials and at the different speeds. Additionally, given the importance of task-specificity to therapeutic interventions, we examined if walking speed adjustment strategies were consistent with those observed during usual overground walking, and if walking with the MR-HMD resulted in increased variability in gait parameters. Overall, participants matched their overground walking speed to the target speed of the MR-HMD visual feedback conditions. The percent inaccuracy was approximately 5% across all speed matching conditions and remained consistent across walking trials after the first overall walking trial. Walking with the MR-HMD did not result in more variability in walking speed, however, we observed more variability in stride length and time when walking with feedback from the MR-HMD compared to walking without feedback. The findings offer support for mixed reality-based visual feedback as a method to provoke goal-specific changes in overground walking behavior. Further studies are necessary to determine the clinical safety and efficacy of this MR-HMD technology to provide extrinsic sensory feedback in combination with traditional treatments in rehabilitation. (shrink)

Normative theories can be useful in developing descriptive theories, as when normative subjective expected utility theory is used to develop descriptive rational choice theory and behavioral game theory. “Ought” questions are also the essence of theories of moral reasoning, a domain of higher mental processing that could not survive without normative considerations.

ABSTRACTMiranda Fricker has characterized epistemic injustice as “a kind of injustice in which someone is wronged specifically in her capacity as a knower” (2007, Epistemic injustice: Power & the e...

As a result of increased interest in global health, more and more medical students and trainees from the.

The best extant statement of the epistemic regress problem makes assumptions that are too strong. An improved version assumes only that that reasons require support, that no proposition is supported only by endless regresses of reasons, and that some proposition is supported. These assumptions are individually plausible but jointly inconsistent. Attempts to explain support by means of unconceptualized sensations, contextually immunized propositions, endless regresses, and holistic coherence all require either additional reasons or an external condition on support that is arbitrary (...) from the believer's own point of view. (shrink)

One way to solve the epistemic regress problem would be to show that we can acquire justification by means of an infinite regress. This is infinitism. This view has not been popular, but Peter Klein has developed a sophisticated version of infinitism according to which all justified beliefs depend upon an infinite regress of reasons. Klein's argument for infinitism is unpersuasive, but he successfully responds to the most compelling extant objections to the view. A key component of his position is (...) his claim that an infinite regress is necessary, but not sufficient, for justified belief. This enables infinitism to avoid a number of otherwise compelling objections. However, it commits infinitism to the existence of an additional feature of reasons that is necessary and, together with the regress condition, sufficient for justified belief. The trouble with infinitism is that any such condition could account for the connection between justification and truth only by undermining the rationale for the regress condition itself. (shrink)

Recent scholarship in technology and society studies has given attention to the notion of technological citizenship. This article seeks to further integrate perspectives on this topic with theoretical contributions about the development of moral autonomy. The author challenges the presumption that the strategy of expanding opportunities for participation in technological decision making will in itself develop people's autonomy and citizenship. He argues that concurrent efforts must be made to democratize the political-economic structures of key technologies and to help people prepare (...) morally for citizenship roles in governing these technologies. On this basis, a series of initiatives are suggested. (shrink)

This paper highlights areas of concern in the assessment of pragmatics, with the intent of stimulating fresh thinking about the assessment of pragmatics both for research purposes and as a part of classroom instruction. It starts by considering what aspects of ability in pragmatics to assess, and then contrasts the trade-off between the feasibility of obtaining data and the ultimate importance of the data. Next, the conspicuous lack of assessment of ability in L2 pragmatics in language classes is noted. Then (...) follow sections on topics all relating primarily to the assessment of pragmatics for research purposes – the use of mixed methods, data elicitation procedures, and norms used in determining the appropriateness of any given performance in pragmatics. The last two topics deal, respectively, with the perceived relevance of the given assessment by the learners and with the value of collecting verbal report data from the respondents as a means for validating the assessment measures. Finally, considerations regarding the most prominent of these issues are provided. (shrink)

Recent literature on epistemic innocence develops the idea that a defective cognitive process may nevertheless merit special consideration insofar as it confers an epistemic benefit that would not otherwise be available. For example, confabulation may be epistemically innocent when it makes a subject more likely to form future true beliefs or helps her maintain a coherent self-concept. I consider the role of confabulation in typical cases of interpersonal gaslighting, and argue that confabulation will not be epistemically innocent in such cases (...) even if it does preserve a coherent self-concept or belief-set for the subject. Analyzing the role of confabulation in gaslighting illustrates its role in on-going interpersonal relationships, and augments already growing evidence that confabulation may be quite widespread. The role of confabulation in gaslighting shows that whether confabulation confers epistemic benefits will depend greatly on the interpersonal context in which it is deployed, while whether a coherent self-concept is epistemically beneficial will depend to a great extent on the content of that self-concept. This shows that the notion of an epistemically harmful or beneficial feature of a cognitive process can and should be further clarified, and that doing so has both theoretical and practical advantages in understanding epistemic innocence itself. (shrink)

Aristotle is essentially human; that is, for all possible worlds metaphysically consistent with our own, if Aristotle exists, then he is human. This is a claim about the essential property of an object. The claim that objects have essential properties has been hotly disputed, but for present purposes, we can bracket that issue. In this essay, we are interested, rather, in the question of whether properties themselves have essential properties (or features) for their existence. We call those who suppose they (...) do “property essentialists”; those who do not, “property anti-essentialists,” or “quidditists.” We offer two complementary arguments. Our total argument is under-girded by two assumptions: transworld identity theory and “received view” counterfactual semantics, a la David Lewis. We then argue that, if one presumes that these are true, then one risks running headlong into paradox if one also accepts property anti-essentialism. That's the first argument. By contrast, if one accepts these same assumptions in conjunction with property essentialism, then the paradox is avoided. This is the second argument. We take it that our arguments work to show that, between property essentialism and quidditism, the property essentialist is on better footing. Plausibly, properties themselves do have essential properties for their existence. (shrink)

Deductive and inductive logic confront this skeptical challenge: we can justify any logical principle only by means of an argument but we can acquire justification by means of an argument only if we are already justified in believing some logical principle. We could solve this problem if probative arguments do not require justified belief in their corresponding conditionals. For if not, then inferential justification would not require justified belief in any logical principle. So even arguments whose corresponding conditionals are epistemically (...) dependent upon their conclusions--epistemically self-supporting arguments--need not be viciously circular. R. B. Braithwaite and James Van Cleve use internalist and externalist versions of this strategy in their proposed solutions to the problem of induction. Unfortunately, their arguments for self-support are unsound and any theory of inferential justification that does not require justified belief in the corresponding conditionals of justification-affording arguments is unacceptably arbitrary. So self-supporting arguments cannot be justification-creating. (shrink)

Interface theory is the hypothesis that inferential, representational theories of perception entail that fitness, not truth, dictates the evolution of perceptual systems. They show, with simulations, that “veridical” perceptual mappings (ones that preserve at least some of the structure of the world) are routinely out-competed by “non-veridical” interfaces (ones that make no attempt to preserve that structure). They therefore take particular aim at the direct perception, ecological approach to perception and work to show that such a system, even if technically (...) an option, would never be selected for by evolution. This paper defends the ecological approach from this novel, existential attack by showing that the ecological hypothesis is so different in kind to the inferential, representational view of perception that it simply falls outside the scope of interface theory’s critiques; ecological psychology remains a viable scientific endeavor. This analysis will show that, far from being a radical new approach to perception, interface theory is simply a clear and elegant formalization of mainstream representational psychology, and any implications interface theory may have belong solely to that branch of science. (shrink)

Purpose This paper aims to analyze some of the epistemically pernicious effects of the use of the internet and social media. In light of this analysis, it introduces the concept of epistemic pornography and argues that epistemic agents both can and should avoid consuming and sharing epistemic pornography. Design/methodology/approach The paper draws on research on epistemic virtue, cognitive biases, social media use and its epistemic consequences, fake news, paternalistic nudging, pornography, moral philosophy, moral elevation and moral exemplar theory to analyze (...) the epistemically pernicious effects of the internet and social media. Findings There is a growing consensus that the internet and social media activate and enable human cognitive biases leading to what are here called “failures of epistemic virtue.” Common formulations of this problem involve the concept of “fake news,” and strategies for responding to the problem often have much in common with paternalistic “nudging.” While fake news is a problem and the nudging approach holds out promise, the paper concludes that both place insufficient emphasis on the agency and responsibility of users on the internet and social media, and that nudging represents a necessary but not sufficient response. Originality/value The essay offers the concept of epistemic pornography as a concept distinct from but related to “fake news” – distinct precisely because it places greater emphasis on personal agency and responsibility, and following recent literature on moral elevation and moral exemplars, as a heuristic that agents might use to economize their efforts at resisting irrational cognitive biases and attempting to live up to their epistemic duties. (shrink)

An argument whose conclusion C is essential evidence for one of its premises can provide its target audience with justification for believing C. This is possible because we can enhance our justification for believing a proposition C by integrating it into an explanatory network of beliefs for which C itself provides essential evidence. I argue for this in light of relevant features of doxastic circularity, epistemic circularity, and explanatory inferences. Finally, I confirm my argument with an example and respond to (...) objections. (shrink)

John Rawls's famous difference principle is capable of at least four distinct statements, each of which occurs in A Theory of Justice. According to what I shall term the Crude Principle it is a necessary and sufficient condition for the justice of an institutional scheme which expands social and economic inequality that, subject to the satisfaction of more weighty principles, it increases the level of advantage of the least advantaged. Expressing this principle Rawls writes that,Assuming the framework of institutions required (...) by equal liberty and fair equality of opportunity, the higher expectations of those better situated are just if and only if they work as part of a scheme which improves the expectations of the least advantaged members of society. The intuitive idea is that the social order is not to establish and secure the more attractive prospects of those better off unless doing so is to the advantage of those less fortunate. (shrink)

A central frustration of recent political discourse is the consistent reduction of politically relevant factual and critical speech to mere expression of partisan commitment. Partisans of “the other side”—members of the other tribe—are viewed as de facto wrong, because partisans, even when their speech invokes mere facts or purportedly shared political principles. Ideally, democratic political discourse operates along at least two central dimensions: a dimension of shared factual, historical, and political assumptions, and a more contested dimension of interpretation, prioritization, and (...) evaluation that results in diverse and often competing understandings of what is good, and so of what is best to collectively pursue. Debates among advocates of competing conceptions of the good and partisans of diverse world views identifiable in terms of the second dimension are, on this picture, constrained and grounded by the shared factual and political commitments of the first, thus ensuring a meaningful basis for ongoing political engagement. While there is little reason to think this ideal has ever been perfectly realized, in recent political discourse statements that events have occurred, drugs are effective, or transparency is important in political conduct cannot seem to get uptake except as mere expressions of political partisanship any more than an actor on stage trying to convince her audience of the danger of a real fire that has broken out in the theater can get uptake for this claim except as an expression in a theatrical performance. In both cases, the real content and discursive intent of speech is undermined by the context in which it occurs. In the case of the actor on stage, the appropriate rules for uptake and interpretation are being followed, just to unfortunate effect. However, in the case of political discourse something seems to be wrong with the rules for uptake and interpretation that have come to dominate in many quarters. This essay relies on recent discussions of silencing and epistemic injustice to introduce the ideas of partisan silencing and hyper-partisan silencing in an attempt to say more precisely what has gone wrong with the rules for uptake and interpretation in political discourse. It then relies on Hannah Arendt’s analyses of truth and lies in politics to connect these phenomena to underlying features of political action and speech. Conditions of partisan and hyperpartisan silencing turn out to be a natural, if not inevitable, consequence of the relationship of truth-telling and deception to political action itself as Arendt understands this. Finally, the essay elaborates on two suggestive passages from Arendt’s 1967 essay “Truth and Politics” to propose potential strategies for resisting conditions of hyperpartisan silencing. Because hyper-partisan silencing itself imposes a certain discursive logic, there are kinds of political speech and action that might succeed in being understood as sincere and so in being persuasive—even in the face of hyper-partisan silencing—precisely because they challenge the assumptions that underpin this discursive logic itself. (shrink)

Progress in emergency and critical care requires that clinical research be performed on patients who are incapable of granting consent for research participation. Analyses of the ethics of such research have left some questions incompletely answered. Why should we be permitted to expose vulnerable patients to research risks without their consent? In particular, how do we justify research interventions that have no potential benefit for participants (nontherapeutic interventions)? This article presents a moral justification for nontherapeutic interventions in emergency research. By (...) relying on a framework for assessing research risks, and by drawing on the example of pediatric research, this justification is founded in how institutional review boards, and society in general, analyze risk. Our justification for emergency research also suggests additional protections for emergency research participants, including a stringent threshold for research risk, that still permit important research to proceed. (shrink)

First published in 1999. Routledge is an imprint of Taylor & Francis, an informa company.

This case is about a study of burn patients that included a request to the IRB for a waiver of consent for perianal specimen collection–a request which ultimately was not approved by a reviewing IR...

There are broad commonalities between the projects of Donald MacKinnon (1913–1994) and Stanley Cavell (1926–) sufficient to make the claim that they struck an analogous pose in their respective contexts. This is not to discount their manifest differences. In the milieu of 1960s and 1970s Cambridge, MacKinnon argued in support of a qualified language of metaphysics in the service of a renewed catholic humanism and Christian socialism. At Harvard, Cavell articulated commitments that made him more at home in the world (...) of North American secular political liberalism. Where Nietzsche, Hume, Freud, Heidegger, Emerson and Thoreau were Cavell’s inspirations, Butler, Kant, G. E. Moore, Collingwood and the New Testament were MacKinnon’s. For all the stark differences, commonalities abound and the reason for this can be traced to a shared appreciation of Austin’s contribution to the ‘lingusitic turn’ together with Wittgenstein’s later work. They both developed projects obsessed with the problem of scepticism together with a commitment to a creative re-animation of moral discourse in light of it, with MacKinnon defending a qualified ‘moral realism’, and Cavell, ‘moral perfectionism’. Seen together, a distinctive post-Kantian and post-Wittgensteinian therapeutic moral philosophy is in evidence. (shrink)

I propose a novel compatibilist interpretation of Leibniz’s mature views concerning what is metaphysically basic. Drawing on a compatibilist reading of Aristotle on primary substance in the Categories and Metaphysics Z, I argue that Leibniz is working with two complementary ways of being metaphysically basic—one applying to immaterial monads, the other to corporeal substances. Although corporeal substances derive their status as basic from their dominant monads, they are nevertheless fully real, unified, and genuinely capable of acting. This perspective respects Leibniz’s (...) idealist tendencies and his commitment to the reality of bodies without attributing inconsistency to his considered views. View HTML Send article to KindleTo send this article to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle. Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply. Find out more about the Kindle Personal Document Service.Harmonizing Leibniz’s OntologyVolume 51, Issue 3ANDREW D. H. STUMPF DOI: https://doi.org/10.1017/S0012217312000704Your Kindle email address Please provide your Kindle [email protected]@kindle.com Available formats PDF Please select a format to send. By using this service, you agree that you will only keep articles for personal use, and will not openly distribute them via Dropbox, Google Drive or other file sharing services. Please confirm that you accept the terms of use. Cancel Send ×Send article to Dropbox To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Dropbox. Harmonizing Leibniz’s OntologyVolume 51, Issue 3ANDREW D. H. STUMPF DOI: https://doi.org/10.1017/S0012217312000704Available formats PDF Please select a format to send. By using this service, you agree that you will only keep articles for personal use, and will not openly distribute them via Dropbox, Google Drive or other file sharing services. Please confirm that you accept the terms of use. Cancel Send ×Send article to Google Drive To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Google Drive. Harmonizing Leibniz’s OntologyVolume 51, Issue 3ANDREW D. H. STUMPF DOI: https://doi.org/10.1017/S0012217312000704Available formats PDF Please select a format to send. By using this service, you agree that you will only keep articles for personal use, and will not openly distribute them via Dropbox, Google Drive or other file sharing services. Please confirm that you accept the terms of use. Cancel Send ×Export citation Request permission. (shrink)

Humans have the ability to learn surprisingly complicated statistical information in a variety of modalities and situations, often based on relatively little input. These statistical learning (SL) skills appear to underlie many kinds of learning, but despite their ubiquity, we still do not fully understand precisely what SL is and what individual differences on SL tasks reflect. Here, we present experimental work suggesting that at least some individual differences arise from stimulus-specific variation in perceptual fluency: the ability to rapidly or (...) efficiently code and remember the stimuli that SL occurs over. Experiment 1 demonstrates that participants show improved SL when the stimuli are simple and familiar; Experiment 2 shows that this improvement is not evident for simple but unfamiliar stimuli; and Experiment 3 shows that for the same stimuli (Chinese characters), SL is higher for people who are familiar with them (Chinese speakers) than those who are not (English speakers matched on age and education level). Overall, our findings indicate that performance on a standard SL task varies substantially within the same (visual) modality as a function of whether the stimuli involved are familiar or not, independent of stimulus complexity. Moreover, test–retest correlations of performance in an SL task using stimuli of the same level of familiarity (but distinct items) are stronger than correlations across the same task with stimuli of different levels of familiarity. Finally, we demonstrate that SL performance is predicted by an independent measure of stimulus-specific perceptual fluency that contains no SL component at all. Our results suggest that a key component of SL performance may be related to stimulus-specific processing and familiarity. (shrink)

Theology, Fantasy, and the Imagination analyzes theological, religious, and philosophical themes in classical Christian fantasy, contemporary “post-Christian” fantasy, and fantasy at play in table top games such as Dungeons and Dragons and Magic: the Gathering.

Research and business investment in emerging nanotechnologies is leading to a diverse range of new substances and products. As workers are faced with handling new materials, often with novel properties, the robustness of current workplace health and safety regulatory frameworks is being brought into question. Here, 12 characteristics of the U.S. occupational safety regulatory framework identified by Choi and Ramachandran are considered in the context of emerging nanotechnologies. The assessment suggests that, as the number of new materials entering the workplace (...) continues to increase, OSHA will need to develop flexible approaches to identifying and reducing potential risks. Relying on conventional approaches in the face of unconventional challenges will increase the probability of otherwise avoidable heath impacts. If the potential for engineered nanomaterials to cause harm is to be understood and managed, the agency will need to look at new approaches to generating, sharing, and using information. (shrink)

Zika infection in pregnant women is associated with an elevated probability of giving birth to a child with microcephaly and multiple other disabilities. Public health messaging on Zika prevention has predominantly targeted women who know they are pregnant or intend to become pregnant, but not teenage females for whom unintended pregnancy is more likely. Vulnerabilities among this population to reproductive risks associated with Zika are further amplified by restrictive abortion laws in several Zika-impacted states. Key to prevention is enhanced, targeted (...) public health messaging centered on teens nationally and particularly in certain high-risk regions. (shrink)

BonJour has proposed background conditions on internalist justification, which Kornblith argues are inconsistent with a core internalist ‘credo’ – that subjects internally alike are justificationally alike – signaling the ‘death’ of internalism. The funeral arrangements are premature, though more systematic consideration of background conditions is needed. The majority of BonJour's conditions are not background conditions as their failure makes an epistemically relevant internal difference. This neutralizes Kornblith's criticisms and reveals how the proposed conditions are not departures from internalism. BonJour's background (...) conditions are simply conditions, the credo remains intact, and Kornblith's objections do not spell problems for internalism, let alone death. (shrink)

Volume 24, Issue 10, October 2024, Page 113-114.

In the Grundlagen , Frege offers eight main arguments, together with a series of more minor supporting arguments, against Mill’s view that numbers are “properties of external things”. This paper reviews all eight of these arguments, arguing that none are conclusive.

This essay is an attempt to demonstrate that Charles Taylor’s “social imaginaries” should not be viewed as sources of identity. For Taylor, making sense of society’s practices allows an individual to develop a conception of the self – an idea Taylor borrows from Hegel. I therefore suggest that Kierkegaard’s critiques against Hegel may similarly be used against Taylor’s conception of identity. Kierkegaard’s critiques of Hegel are applicable to Taylor’s social imaginaries for two reasons. First, Hegel’s system only provides approximations—mediation in (...) the ethical nullifies the individual’s subjective relation to Kierkegaard’s “Absolute” by objectivizing the relation. Thus, despair ensues. Second, if knowledge of the Absolute is mediated through social imaginaries, the individual’s responsibility to perpetually renew faith in her constituting power is diminished. Taylor’s “system” is therefore insufficient for achieving a positive view of existence because selfhood is properly understood through the inward subjectivity of one’s relation to her constituting power. (shrink)