PurposeTo evaluate the relationship between intraocular straylight perception and: (i) contrast sensitivity (CS), (ii) halo size, and (iii) hazard recognition distance, in the presence and absence of glare.Subjects and methodsParticipants were 15 (5 female) ophthalmologically healthy adults, aged 54.6–80.6 (median: 67.2) years. Intraocular straylight (log s) was measured using a straylight meter (C-Quant; Oculus GmbH, Wetzlar, Germany). CS with glare was measured clinically using the Optovist I device (Vistec Inc., Olching, Germany) and also within a driving simulator using Landolt Cs. (...) These were presented under both static or dynamic viewing conditions, and either with or without glare. Hazard detection distance was measured for simulated obstacles of varying contrast. For this, the participant was required to maintain a speed of 60 km/h within a custom-built nighttime driving simulator. Glare was simulated by LED arrays, moved by cable robots to mimic an oncoming car’s headlights. Halo size (“halometry”) was measured by moving Landolt Cs outward originating from the center of a static glare source. The outcome measure from “halometry” was the radius of the halo (angular extent, in degrees visual angle).ResultsThe correlation between intraocular straylight perception, log s, and hazard recognition distance under glare was poor for the low contrast obstacles (leading/subdominant eye: r = 0.27/r = 0.34). Conversely, log CS measured with glare strongly predicted hazard recognition distances under glare. This was true both when log CS was measured using a clinical device (Optovist I: r = 0.93) and within the driving simulator, under static (r = 0.69) and dynamic (r = 0.61) conditions, and also with “halometry” (r = 0.70). Glare reduced log CS and hazard recognition distance for almost all visual function parameters.ConclusionIntraocular straylight was a poor predictor of visual function and driving performance within this experiment. Conversely, CS was a strong predictor of both hazard recognition and halo extent. The presence of glare and motion lead to a degradation of CS in a driving simulator. Future studies are necessary to evaluate the effectiveness of all above-mentioned vision-related parameters for predicting fitness to drive under real-life conditions. (shrink)

Berkeley’s likeness principle is the claim that “an idea can be like nothing but an idea”. The likeness principle is intended to undermine representationalism: the view (that Berkeley attributes to thinkers like Descartes and Locke) that all human knowledge is mediated by ideas in the mind which represent material objects. Yet, Berkeley appears to leave the likeness principle unargued for. This has led to several attempts to explain why Berkeley accepts it. In contrast to ‘metaphysical’ and ‘epistemological’ interpretations available in (...) the literature, in this paper I defend a ‘conceptual’ interpretation. I argue that Berkeley accepts the likeness principle on the basis of (i) his commitment to the transparency of ideas, and (ii) his account of resemblance which he sets out in his works on vision. Thus, I provide an explanation for Berkeley’s reasons for accepting the likeness principle which, appropriately, focuses on his views concerning ideas and likeness. (shrink)

Margaret Macdonald was at the institutional heart of analytic philosophy in Britain in the mid-twentieth century. Yet, her views on the nature of philosophical theories diverge quite considerably from those of many of her contemporaries. In this paper, I focus on her 1953 article ‘Linguistic Philosophy and Perception’, a provocative paper in which Macdonald argues that the value of philosophical theories is more akin to that of poetry or art than science or mathematics. I do so for two reasons. First, (...) because it reveals just how far Macdonald’s meta- philosophical views diverged from those of many of her contemporaries. Second, because the discussion in LPP pre-empts recent literature on the nature of philosophical inquiry and the efficacy of philosophical arguments. Indeed, Macdonald’s paper is just as likely to provoke discussion today as it was in the 1950s. (shrink)

This paper provides a philosophical evaluation of the concept of handedness prevalent but largely unspoken in the scientific literature. This literature defines handedness as the preference or ability to use one hand rather than the other across a range of common activities. Using the philosophical discipline of phenomenology, I articulate and critique this conceptualization of handedness. Phenomenology shows defining a concept of handedness by focusing on hand use leads to a right hand biased concept. I argue further that a phenomenological (...) model based in spatial orientation rather than hand use provides a more inclusive concept of handedness. (shrink)

The definition of ‘patient’ is commonly taken for granted and considered as obvious, but the term is rather underconceptualised in the literature. In this paper, it will be argued that the criterion of suffering can be considered a sufficient criterion for a parent to be considered a secondary patient when their seriously ill child is receiving medical care (i.e. not necessarily the parents themselves) – these parents are sufferers in virtue of the suffering of others. The nature of parental and (...) child health and well-being is clearly relational and bidirectional, thus also a bidirectional and relational integration of parental and paediatric patient care is necessary. A genuine expansion of the concept ‘patient’ to parents, both practically and theoretically, can help to bring awareness to the closely intertwining, interacting and interdependent vulnerabilities of both parties, the potential conflicts of interests involved, and also to demand support and reduce hurdles, for example, in reimbursement by health insurers. Treating parents as patients will (1) help the affected child (the primary patient), as unhealthy and/or mentally unstable parents are likely to negatively influence a child's treatment and (2) prevent the parents (the secondary patients) from becoming primary patients themselves due to their suffering because of their child's illness. (shrink)

In this important new book in the IPPP series, a group of leading thinkers in psychiatry, psychology, and philosophy offer alternative perspectives that address both the scientific and clinical aspects of psychiatric validation, emphasizing throughout their philosophical and historical considerations.

It is argued that causal understanding originates in experiences of acting on objects. Such experiences have consistent features that can be used as clues to causal identification and judgment. These are singular clues, meaning that they can be detected in single instances. A catalog of 14 singular clues is proposed. The clues function as heuristics for generating causal judgments under uncertainty and are a pervasive source of bias in causal judgment. More sophisticated clues such as mechanism clues and repeated interventions (...) are derived from the 14. Research on the use of empirical information and conditional probabilities to identify causes has used scenarios in which several of the clues are present, and the use of empirical association information for causal judgment depends on the presence of singular clues. It is the singular clues and their origin that are basic to causal understanding, not multiple instance clues such as empirical association, contingency, and conditional probabilities. (shrink)

William Molyneux was born in Dublin, studied in Trinity College Dublin, and was a founding member of the Dublin Philosophical Society (DPS), Ireland’s counterpart to the Royal Society in London. He was a central figure in the Irish intellectual milieu during the Early Modern period and – along with George Berkeley and Edmund Burke – is one of the best-known thinkers to have come out of that context and out of Irish thought more generally. In 1688, when Molyneux wrote the (...) letter to Locke in which he posed the now famous question about a man born blind made to see, he was an active member of the DPS and was on familiar terms with several other key figures in Irish philosophy at the time. For the most part, Irish thinkers in the seventeenth and eighteenth centuries answered “no” to Molyneux’s question of whether a blind man made to see could distinguish, by sight alone, between a cube and a sphere. (shrink)

Full ectogenesis as the complete externalization of human reproduction by bypassing the bodily processes of gestation and childbirth can be considered the culmination of genetic and reproductive technologies. Despite its still being a hypothetical scenario, it has been discussed for decades as the ultimate means to liberate women from their reproductive tasks in society and hence finally end fundamental gender injustices generally. In the debate about the application of artificial wombs to achieve gender equality, one aspect is barely mentioned but (...) is of crucial relevance from a medical‐ethical perspective: whether and how could full ectogenesis be justified as a proper use of medicine? After characterizing the technology as a special form of human enhancement and as an extension of medical practice that goes beyond the traditional field of medicine, this paper critically assesses the theoretical possibilities of legitimizing this extension. We identify two ways of justification: either one argues that ectogenesis fulfils a proper goal of medicine (a justification we call pathologization), or one argues that the application of ectogenesis achieves a non‐medical goal (which we call medicalization). Because it is important from a medical‐ethical point of view to avoid an inappropriate instrumentalization or misuse of medicine and thus an undue medicalization of non‐medical problems, a set of necessary conditions has to be met. It is doubtful whether full ectogenesis for non‐medical purposes could fulfil these conditions. Rather, its comprehensive usage could be seen as a revolutionary modification of what it means to be human. (shrink)

In September 2008, the European Organization for Nuclear Research (CERN) scientists successfully switched on the historic biggest physics device, the Large ...

Since its original publication in 1975, this groundbreaking work has awakened millions of people to the existence of "speciesism"—our systematic disregard of nonhuman animals—inspiring a worldwide movement to transform our attitudes to animals and eliminate the cruelty we inflict on them. In Animal Liberation, author Peter Singer exposes the chilling realities of today’s "factory farms" and product-testing procedures—destroying the spurious justifications behind them, and offering alternatives to what has become a profound environmental and social as well as moral issue. (...) An important and persuasive appeal to conscience, fairness, decency, and justice, it is essential reading for the supporter and the skeptic alike. (shrink)

"This book is an augmented and updated translation by the author of Theorie des Subjekts: Subjectiviteat und Identiteat zwischen Moderne und Postmoderne, Teubingen, Francke-UTB, 2010 (3rd ed.)"--Title page verso.

Prospect Theory: For Risk and Ambiguity, provides a comprehensive and accessible textbook treatment of the way decisions are made both when we have the statistical probabilities associated with uncertain future events and when we lack them. The book presents models, primarily prospect theory, that are both tractable and psychologically realistic. A method of presentation is chosen that makes the empirical meaning of each theoretical model completely transparent. Prospect theory has many applications in a wide variety of disciplines. The material in (...) the book has been carefully organized to allow readers to select pathways through the book relevant to their own interests. With numerous exercises and worked examples, the book is ideally suited to the needs of students taking courses in decision theory in economics, mathematics, finance, psychology, management science, health, computer science, Bayesian statistics, and engineering. (shrink)

In my contribution to this Concise Collection on Margaret Cavendish, I focus on teaching Cavendish’s work in the context of philosophy (and, more specifically, Early Modern Philosophy). I have three aims. First, to explain why teaching women from philosophy’s history is crucially important to the discipline. Second, to outline my own reflections on teaching Cavendish’s philosophy. Third, to defend a specific claim about the benefits of teaching Cavendish to philosophy students; namely, that introducing biographical detail alongside philosophical ideas enriches the (...) learning experience. (shrink)

The ethics of human enhancement has been a hotly debated topic in the last 15 years. In this debate, some advocate examining science fiction stories to elucidate the ethical issues regarding the current phenomenon of human enhancement. Stories from science fiction seem well suited to analyze biomedical advances, providing some possible case studies. Of particular interest is the work of screenwriter Andrew Niccol (Gattaca, S1m0ne, In Time, and Good Kill), which often focuses on ethical questions raised by the use of (...) new technologies. Examining the movie In Time (2011), the aim of this paper is to show how science fiction can contribute to the ethical debate of human enhancement. In Time provides an interesting case study to explore what could be some of the consequences of radical life-extension technologies. In this paper, we will show how arguments regarding radical life-extension portrayed in this particular movie differ from what is found in the scientific literature. We will see how In Time gives flesh to arguments defending or rejecting radical life-extension. It articulates feelings of unease, alienation and boredom associated with this possibility. Finally, this article will conclude that science fiction movies in general, and In Time in particular, are a valuable resource for a broad and comprehensive debate about our coming future. (shrink)

P.F. Strawson's essay traces some formal characteristics of logic and grammar to their roots in general features of thought and experience.

In der genannten Epoche werden Grundentscheidungen gefällt, welche die Fundamentalfrage der Philosophie, die Seinsfrage, in die Krisis führen, in den Nihilismus unter ontologischem, metaphysischem, epistemologischem, axiologischem Aspekt. Den Extrempositionen der Systemdenker Hegel, Schopenhauer und Schelling erwachsen in den Hegelkritikern Feuerbach, Br. Bauer, Marx und Stirner Kontrapositionen, die das Wahrheitsproblem der Beliebigkeit unterstellen. Kierkegaard klagt unter existentiellem Aspekt das Problem der Wahrheit ein. Nietzsche überholt durch Abschaffung der Wahrheit alle Positionen,was seinen Standort in der europäischen Denkgeschichte ausmacht und als Ergebnis der (...) problemgeschichtlichen Analysen zu charakterisieren ist. Die Rückgewinnung des Vernunfthorizontes setzen erst die Problemdenker N. Hartmann und M. Heidegger ins Werk durch kritische Erneuerung der Seinsfrage. (shrink)

In The Metaphysics of Margaret Cavendish and Anne Conway, Marcy P. Lascano holds up the metaphysical views of two early modern women philosophers alongside one another in order to demonstrate that...

An examination of topics involved in statistical reasoning with imprecise probabilities. The book discusses assessment and elicitation, extensions, envelopes and decisions, the importance of imprecision, conditional previsions and coherent statistical models.

The definition of ‘patient’ is commonly taken for granted and considered as obvious, but the term is rather underconceptualised in the literature. In this paper, it will be argued that the criterion of suffering can be considered a sufficient criterion for a parent to be considered a secondary patient when their seriously ill child is receiving medical care (i.e. not necessarily the parents themselves) – these parents are sufferers in virtue of the suffering of others. The nature of parental and (...) child health and well-being is clearly relational and bidirectional, thus also a bidirectional and relational integration of parental and paediatric patient care is necessary. A genuine expansion of the concept ‘patient’ to parents, both practically and theoretically, can help to bring awareness to the closely intertwining, interacting and interdependent vulnerabilities of both parties, the potential conflicts of interests involved, and also to demand support and reduce hurdles, for example, in reimbursement by health insurers. Treating parents as patients will (1) help the affected child (the primary patient), as unhealthy and/or mentally unstable parents are likely to negatively influence a child's treatment and (2) prevent the parents (the secondary patients) from becoming primary patients themselves due to their suffering because of their child's illness. (shrink)

Evidence shows that during birth women frequently experience unconsented care, coercion, and a loss of autonomy. For many countries, this contradicts both the law and medical ethics guidelines, which emphasize that competent and fully informed women’s autonomy must always be respected. To better understand this discordance, we empirically describe perinatal maternity care providers’ and women’s moral deliberation surrounding coercive measures during birth. Data were obtained from 1-on-1 interviews with providers (N = 15) and women (N = 14), and a survey (...) of women (N = 118). Analyses focused on an in-depth exploration of responses to a question on the permissibility of coercion in birth whose wording was borrowed from a Swiss medical-ethical guideline. Reasons for and against a principle permissibility of coercive measures in birth were grouped into clusters of reasons to build a coherent explanatory framework. Factors considered morally relevant when deliberating on coercion included women’s decisional capacity, beneficence/non-maleficence, authority through knowledge on the part of providers, flaws of the medical system, or the imperative to protect the most vulnerable. Also, we identified various misconceptions, such as the conviction that a pathological birth can justify coercion or that fetal rights can justifiably infringe on women’s autonomy. Information and education on the issue of coercion in birth are urgently needed to enable women to fully exercise their reproductive autonomy, to prevent long-term adverse health outcomes of women and children, and to reconcile the medical vigilance which has lead to a reduction of perinatal morbidity and mortality with women’s enfranchisement in their own care. (shrink)

ZusammenfassungObwohl Film nicht nur eine große Popularität und mediale Vertrautheit genießt, sondern auch als eine der bedeutendsten kulturprägenden Kunstformen der Gegenwart sowie als Mittel kollektiver Selbstverständigung und Ausdruck gesellschaftlicher Reflexion gelten kann, finden filmische Auseinandersetzungen mit aktuellen bioethischen Problemkonstellationen bislang kaum Beachtung im akademischen Diskurs. Dies gilt nicht nur für die vielschichtige Symbolbildung von Spielfilmen, sondern auch für das narrative Potenzial von Dokumentarfilmen. Dabei können dokumentarische Erzählformen wichtige Bedeutungsebenen ethischer Fragestellungen erschließen, indem sie Einblick in die individuellen Lebenslagen der Betroffenen (...) und ihre jeweiligen Perspektiven gewähren. Wie kaum ein anderes Medium ist der Dokumentarfilm geeignet, dabei die persönliche Dimension medizinischer Entscheidungen jenseits theoretischer Argumentationen erfahrbar zu machen. Dieser diskursive Mehrwert, den die Einbeziehung von Dokumentarfilmen in die bioethische Debatte haben kann, wird in diesem Beitrag zunächst als Theorie formuliert und anschließend an zwei Filmbeispielen erläutert, welche die Thematik der Leihmutterschaft aufgreifen und somit eine aktuelle Fragestellung der Reproduktionsmedizin ins Bild setzen. (shrink)

Entamoeba histolytica is a protozoan parasite of humans, and the causitive agent of intestinal amebiasis. The disease‐causing stage of the parasite is an osmotically sensitive ameboid form, which differentiates into a thick‐walled cyst for transmission from person to person. The conditions within the human intestine that induce encystment of the amoeba are unknown, but studies using an amoebic parasite of reptiles are now yielding information about the molecules and host:parasite interactions involved in the process. An understanding of the amoeba's obligatory (...) encystment pathway should provide an approach for interrupting the transmission of this parasite, for which there is currently no vaccine. (shrink)

Durch Fortschritte in der modernen Reproduktionsmedizin ist es Frauen heute möglich, auch nach der Menopause mit eigenen Eizellen schwanger zu werden. Damit wird die Fortpflanzung im homologen System auch im Alter zu einer realistischen Option. Gegen derartige späte Schwangerschaften gibt es vielfältige Argumente, die vor allem auf mögliche Schädigungen aufgrund des hohen Alters der Mutter verweisen. Maßnahmen der Anti-Aging-Medizin zum Erhalt bzw. zur Verbesserung der kognitiven und physischen Leistungsfähigkeit im fortgeschrittenen Alter könnten diese Einwände gegen den Einsatz von Reproduktionstechniken nach (...) der Menopause entkräften. Der Beitrag geht der Frage nach, wie erstrebenswert postmenopausale Schwangerschaften unter diesen Voraussetzungen eigentlich sind. Es wird die These vertreten, dass eine Schadensargumentation für eine ethische Bewertung allein nicht ausreichend ist, sondern auch Überlegungen zu Status und Authentizität des Kinderwunsches, zum Selbstverständnis der Medizin, zur Autonomie der Betroffenen sowie zur Natürlichkeit der Lebensführung berücksichtigt werden müssen. Darüber hinaus zeigt sich, wie Entwicklungen in zwei spezifischen Anwendungsbereichen (Anti-Aging- und Reproduktionsmedizin) in einer gemeinsamen Betrachtung zusammengeführt und mit Gewinn für allgemeinere medizinethische Überlegungen bewertet werden können. (shrink)

Die Bestimmung des Herstellungsbegriffs setzt bei der aristotelischen Unterscheidung zwischen den Tätigkeitsformen der poiesis sowie praxis an. Anders als das selbstzweckliche Handeln ist das herstellende Hervorbringen immer zweckorientierte, auf etwas außerhalb ihrer selbst gerichtete Tätigkeit. Anthropologisch gewendet, lässt sich die entsprechende Fähigkeit zur instrumentellen Mittel erfindung und systematischen Mittelherstellung als zentrales Wesensmerkmal des Menschen bestimmen. Nach Hannah Arendt sind veschiedene Aspekte des Herstellens als einzigartiger Fähigkeit des Menschen zu unterscheiden. Auf der Seite des Herstellungsprozesses sind die eindeutig bestimmbare Abgeschlossenheit und (...) die Finalität das Herstellens charakteristisch; auf der Seite des hergestellten Produktes sind die Gegenständlichkeit des Hergestellten sowie die von diesem unabhängige Beständigkeit des Produktentwurfs bestimmend, in dem wiederum die grundsätzliche Anlage zur Vervielfältigung und Massenproduktion jeder Hervorbringung gründet. Hieraus ergibt sich die Haltbarkeit als inhärente Eigenheit des Hergestellten, das somit seinen Hersteller potenziell überdauert. Schließlich wird die anthopologische Bedeutung des Herstellungshandelns deutlich: der unstete Mensch, dessen Leben in Struktur und Verlauf dauerhaft anfällig und beständig unbeständig ist, benötigt zum Überleben verlässlich Dauerhaftes, Beständiges. Als Homo faber gelingt es ihm, seine eigene Unnatürlichkeit durch selbstgemachte Künstlichkeit zu ergänzen und sich so eine “Heimat” zu schaffen. (shrink)