The vertebrate retina is said to be inverted because the photoreceptors are oriented in the posterior direction and are thus unable to maximize photodetection under conditions of low illumination. The tapetum lucidum is a photoreflective structure located posterior to the photoreceptors in the eyes of some fish and terrestrial animals. The tapetum reflects light forward, giving incident photons a “second chance” to collide with a photoreceptor, substantially enhancing retinal photosensitivity in dim light. Across vertebrates (and arthropods), there are a wide (...) variety of tapeta that vary in structure, chemical composition, and even tissue architecture, indicating repeated convergent evolution. To date, the tapetum has not been observed in any cephalopod, however, which also possess a camera‐like eye, but with the retinal photoreceptors oriented in the anterior direction. We therefore hypothesize that the tapetum lucidum is a compensatory adaptation for the suboptimal design of the inverted retina of vertebrates. (shrink)

How does one arrive at a life in politics and policy? What happens to one's ideals when confronted with the reality that the only way to get things done in Washington is compromise? Who are the men and women who help shape our national agenda, and what drives their work? Dispatches From the Eastern Front provides fascinating, intensely personal, yet universal answers to these central questions. Recounting four decades inside Washington politics, Gerald Felix Warburg brings remarkable candor to a (...) most unusual memoir. An idealistic California baby boomer transported to the intimidating world of Capitol Hill policymaking at a young age, Warburg finds himself working to reform nuclear energy, strategic arms control, and foreign policy. As his access and power grow, greater challenges loom: how to maintain principles while cutting deals, and how to balance public purpose with private interests. An eclectic career reveals the slow and often painful development of emotional intelligence for work at the highest reaches of the public arena. (shrink)

Shaʻar rishon. Hagut hilkhatit u-midrashit be-sifrut Ḥazal -- Shaʻar sheni. Haguto ha-hilkhatit shel ha-Rambam -- Shaʻar shelishi. Hagut ṿa-halakhah bi-yeme ha-benayim -- Shaʻar reviʻi. Hagut rabanit ba-ʻet ha-ḥadashah.

A Nobel Prize-winning scientist and a leading brain researcher show how the brain creates conscious experience.

The phenomenological perspective described by M. Merleau-Ponty seems to be emerging in the context of contemporary developmental research, theories of communication, metaphor theory, and cognitive neuroscience. This emergence is not always accompanied by reference to Merleau-Ponty, however, or appropriate interpretation. On some cases, the emergence of the perspective seems rather inadvertent. The purpose of this essay is to ferret out some of the points which contemporary thinking has in common with Merleau-Ponty's phenomenology. Though it may appear that the examples chosen (...) for this essay might be scrutinized separately, the thread that ties them together is Merleau-Ponty's work. 2012 APA, all rights reserved). (shrink)

In this book G. A. Cohen examines the libertarian principle of self-ownership, which says that each person belongs to himself and therefore owes no service or product to anyone else. This principle is used to defend capitalist inequality, which is said to reflect each person's freedom to do as as he wishes with himself. The author argues that self-ownership cannot deliver the freedom it promises to secure, thereby undermining the idea that lovers of freedom should embrace capitalism and the inequality (...) that comes with it. He goes on to show that the standard Marxist condemnation of exploitation implies an endorsement of self-ownership, since, in the Marxist conception, the employer steals from the worker what should belong to her, because she produced it. Thereby a deeply inegalitarian notion has penetrated what is in aspiration an egalitarian theory. Purging that notion from socialist thought, he argues, enables construction of a more consistent egalitarianism. (shrink)

In Life's Dominion Ronald Dworkin argues that disagreement over the morality ofabortion is about how best to respect the intrinsic value of human life, rather than about foetal rights as many people mistakenly suppose. Dworkin argues that the state should be neutral indebates about intrinsic value and thus it should be neutral in the abortion debate. Through a consideration of the notion of intrinsic value, it is argued in this article that Dworkin'sargument fails. On the interpretation of which Dworkin seems (...) to favour, it is shown to be implausible that such a notion accounts for different views about the value of human life. On an alternative interpretation of it is argued that the state is not usually neutral on such matters, and thus there is no reason why it should be in the case of abortion. (shrink)

This contemporary, comprehensive, and practical text helps you discover and determine your own guidelines for helping within the broad limits of professional codes of ethics and divergent theoretical positions. This text is the relied-upon, essential text for students in any helping field-the book many students return to well into their professional careers. The authors raise what they consider to be central issues, present a range of diverse views on the issues, discuss their position, and present opportunities for you to refine (...) your own thinking and actively develop your own informed position. Questions explored include: What role do the therapist's personal values play in the counseling relationship? What ethical responsibilities and rights do clients and therapists have? What considerations are involved in adapting counseling practice to diverse client populations? And more... (shrink)

Philosophical interest in disability is rapidly expanding. Philosophers are beginning to grasp the complexity of disability--as a category, with respect to well-being and as a marker of identity. However, the philosophical literature on justice and human rights has often been limited in scope and somewhat abstract. Not enough sustained attention has been paid to the concrete claims made by people with disabilities, concerning their human rights, their legal entitlements and their access to important goods, services and resources. This book discusses (...) how effectively philosophical approaches to distributive justice and human rights can support these concrete claims. It argues that these approaches often fail to lend clear support to common disability demands, revealing both the limitations of existing philosophical theories and the inflated nature of some of these demands. Moving beyond entitlements, the author also develops a unique conception of dignity, which she argues illuminates the specific indignities experienced by people with disabilities in the allocation of goods, in the common experience of discrimination and in a wide range of interpersonal interactions. Disability with Dignity offers an accessible and extended philosophical discussion of disability, justice and human rights. It provides a comprehensive assessment of the benefits and pitfalls of theories of human rights and justice for advancing justice for the disabled. It brings the moral importance of dignity to the centre, arguing that justice must be pursued in a way that preserves and promotes the dignity of people with disabilities. (shrink)

Is socialism desirable? Is it even possible? In this concise book, one of the world's leading political philosophers presents with clarity and wit a compelling moral case for socialism and argues that the obstacles in its way are exaggerated. There are times, G. A. Cohen notes, when we all behave like socialists. On a camping trip, for example, campers wouldn't dream of charging each other to use a soccer ball or for fish that they happened to catch. Campers do not (...) give merely to get, but relate to each other in a spirit of equality and community. Would such socialist norms be desirable across society as a whole? Why not? Whole societies may differ from camping trips, but it is still attractive when people treat each other with the equal regard that such trips exhibit. But, however desirable it may be, many claim that socialism is impossible. Cohen writes that the biggest obstacle to socialism isn't, as often argued, intractable human selfishness--it's rather the lack of obvious means to harness the human generosity that is there. Lacking those means, we rely on the market. But there are many ways of confining the sway of the market: there are desirable changes that can move us toward a socialist society in which, to quote Albert Einstein, humanity has "overcome and advanced beyond the predatory stage of human development.". (shrink)

Digital phenotyping will potentially enable earlier detection and prediction of mental illness by monitoring human interaction with and through digital devices. Notwithstanding its promises, it is certain that a person’s digital phenotype will at times be at odds with their first-person testimony of their psychological states. In this paper, we argue that there are features of digital phenotyping in the context of psychiatry which have the potential to exacerbate the tendency to dismiss patients’ testimony and treatment preferences, which can be (...) instances of epistemic injustice. We first explain what epistemic injustice is, and why it is argued to be an extensive problem in health and disability settings. We then explain why epistemic injustice is more likely to apply with even greater force in psychiatric contexts, and especially where digital phenotyping may be involved. Finally, we offer some tentative suggestions of how epistemic injustice can be minimised in digital psychiatry. (shrink)

This article develops a detailed, empirically driven analysis of the nature of the transition costs incurred in becoming disabled. Our analysis of the complex nature of these costs supports the claim that it can be wrong to cause disability, even if disability is just one way of being different. We also argue that close attention to the nature of transition costs gives us reason to doubt that well-being, including transitory impacts on well-being, is the only thing that should determine the (...) wrongness of causing or removing disability. Non-welfare considerations also defeat the claim that it is always wrong to cause disability. The upshot of these conclusions is that closer attention to the nature of transition costs supports disabled people who strenuously contest the assumption that their well-being is lower than nondisabled people. It also suggests that, in addition, disabled people should contest their opponents’ narrow account of how we should make ethical decisions regarding causing or failing to prevent disability. (shrink)

Bruns lucidly depicts the distinctions and convergences between these two lines of thought by examining the works of Mallarme, Flaubert, Joyce, Beckett, and ...

The evolution of reciprocal altruism probably involved the evolution of mechanisms to detect cheating and remember cheaters. In a well-known study, Mealey, Daood, and Krage (1996) observed that participants had enhanced memory for faces that had previously been associated with descriptions of acts of cheating. There were, however, problems with the descriptions that were used in that study. We sought to replicate and extend the findings of Mealey and colleagues by using more controlled descriptions and by examining the possibility of (...) enhanced altruist recognition. We also examined whether individual differences in cheating tendencies were related to cheater and altruist recognition. In the first experiment, 164 undergraduates saw 40 faces that were paired with character descriptions representing the categories of cheater, trustworthy, altruist, or neutral, for individuals who had either low or high social status. One week later participants reported which faces they recognized from the previous week (among 80 faces). Overall, the results failed to replicate the findings of Mealey and her colleagues, as there was no enhanced memory for cheaters. In addition, there was no enhanced memory for altruists, and no effect of participants’ cheating tendencies. A second experiment using a slightly different methodology produced similar results, with some evidence for enhanced memory for altruists. (shrink)

Across three studies, the authors examine the interactive effects of moral identity and the negative reciprocity norm in predicting revenge. The general argument is that moral identity provides the motivational impetus for individuals’ responses, whereas the normative framework that people adopt as a basis for guiding moral action influences the direction of the response. Results indicated that moral identity and the negative reciprocity norm significantly interacted to predict revenge. More specifically, the symbolization dimension of moral identity interacted with the negative (...) reciprocity norm to predict revenge when individuals were the targets of mistreatment, whereas the internalization dimension of moral identity interacted with the negative reciprocity norm to predict revenge when individuals were the observers of mistreatment. Theoretical implications related to the differences between the symbolization and internalization dimensions of moral identity, the importance of examining normative frameworks, and the functionality of revenge are discussed. (shrink)

Emotion regulation choices are known to be profoundly consequential across affective, cognitive, and social domains. Prior studies have identified two important external factors of emotion regulati...

Psychologists today must deal with a broad range of ethical issues--from charging fees to maintaining a client's confidentiality, and from conducting research to respecting clients, colleagues, and students. As the field of psychology has grown in size and scope, the role of ethics has become more important and complex whether the psychologist is involved in teaching, counseling, research, or practice. Now this most widely read and cited ethics text in psychology has been revised to reflect the ethics questions and dilemmas (...) that psychologists encounter in their everyday work. Ethics in Psychology has been completely updated in response to evolving trends in psychological research and practice, as well as extensive changes in the American Psychological Association's ethics code. Gerald P. Koocher and Patricia Keith-Spiegel take a practical, commonsense approach to ethics in modern-day psychological practice, and offer constructive suggestions for both preventing problems and resolving ethical predicaments. In this book, their main intent is to present the full range of contemporary ethical issues in psychology as not only relevant and intriguing, but also as integral and unavoidable aspects of the profession. The authors make extensive use of actual case studies in order to illustrate how the APA guidelines apply to specific situations, such as fee setting, advertising for clients, research ethics, sexual attraction, classroom ethics, managed care issues, confidentiality, and much more. The most recent ethics code of the American Psychological Association (1992) is used here only as a starting point. The authors go well beyond the APA code and incorporate the input of many experts. In addition to the analysis of a wide variety of general situations, new problematic areas are identified and explored. The book includes two appendixes - Ethical Principles of Psychologists and Code of Conduct, adopted by American Psychological Association, Rules and Procedures of the Ethics Committee of the American Psychological Association - both in an easy-to-use format. In addition, each chapter lists summary guidelines along with current and valuable references. Highly readable, the book unites a straightforward, lively writing style with humorous anecdotes that highlight the human side of ethics and make the book a pleasure to read. Ethics in Psychology will be an indispensable guide to ethical decision-making for all psychologists and students in psychology. (shrink)

Philosophers and bioethicists are typically sceptical about invocations of dignity in ethical debates. Many believe that dignity is essentially devoid of meaning: either a mere rhetorical gesture used in the absence of good argument or a faddish term for existing values like autonomy and respect. On the other hand, the patient experience of dignity is a substantial area of research in healthcare fields like nursing and palliative care. In this paper, it is argued that philosophers have much to learn from (...) the concrete patient experiences described in healthcare literature. Dignity is conferred on people when they are treated as having equal status, something the sick and frail are often denied in healthcare settings. The importance of equal status as a unique value has been forcefully argued and widely recognised in political philosophy in the last 15 years. This paper brings medical ethics up to date with philosophical discussion about the value of equal status by developing an equal status conception of dignity. (shrink)

What kind of thing is a reason for action? Are reasons for action subjective states of the agent, such as desires and/or beliefs? Or are they, rather, objective features of situations that favor certain actions? The suggestion offered in this article is that neither strategy satisfies. What is needed is a third category for classifying reasons which makes them out to be neither purely subjective nor purely objective. In brief: a reason for action is a feature of the situation that (...) matters to the agent. On this proposal, subjective states of the agent are indeed indispensable in characterizing reasons for action. Precisely which set of situational features matter to an agent—precisely what shape the agent experiences the situation as having—depends on the agent's psychological makeup. Those features themselves are not psychological states, however, and it is precisely those features that constitute the agent's reasons for action. (shrink)

The red tape and delays around research ethics and governance approvals frequently frustrate researchers yet, as the lesser of two evils, are largely accepted as unavoidable. Here we quantify aspects of the research ethics and governance approvals for one interview- and questionnaire-based study conducted in England which used the National Health Service procedures and the electronic Integrated Research Application System. We demonstrate the enormous impact of existing approvals processes on costs of studies, including opportunity costs to focus on the substantive (...) research, and suggest directions for radical system change. We have recorded 491 exchanges with 89 individuals involved in research ethics and governance approvals, generating 193 pages of email text excluding attachments. These are conservative estimates. The exchanges were conducted outside IRAS, expected to be the platform where all necessary documents are provided and questions addressed. Importantly, the figures exclude the actual work of preparing the ethics documentation. We propose six areas of work to enable system change: 1. Support the development of a broad range of customised research ethics and governance templates to complement generic, typically clinical trials orientated, ones; 2. Develop more sophisticated and flexible frameworks for study classification; 3. Link with associated processes for assessment, feedback, monitoring and reporting, such as ones involving funders and patient and public involvement groups; 4. Invest in a new generation IT infrastructure; 5. Enhance system capacity through increasing online reviewer participation and training; and 6. Encourage researchers to quantify the approvals processes for their studies. Ethics and governance approvals are burdensome for historical reasons and not because of the nature of the task. There are many opportunities to improve their efficiency and analytic depth in an age of innovation, increased connectivity and distributed working. If we continue to work under current systems, we are perpetuating, paradoxically, an unethical system of research approvals by virtue of its wastefulness and impoverished ethical debate. (shrink)

Individuals with ‘severe’ cognitive disabilities are primarily discussed in philosophy and bioethics to determine their moral status. In this paper it is argued that theories of moral status have limited relevance to the unjust ways in which people with cognitive disabilities are routinely treated in the actual world, which largely concerns their relegation to an inferior social status. I discuss three possible relationships between moral and social status, demonstrating that determinate answers about the moral status of individuals with ‘severe’ cognitive (...) disabilities are neither necessary nor sufficient for defending the imperative that they be treated as our social equals. (shrink)

This study examines the history of the psychoanalytic theory of mysticism, starting with the seminal correspondence between Freud and Romain Rolland concerning the concept of "oceanic feeling." Providing a corrective to current views which frame psychoanalysis as pathologizing mysticism, Parsons reveals the existence of three models entertained by Freud and Rolland: the classical reductive, ego-adaptive, and transformational (which allows for a transcendent dimension to mysticism). Then, reconstructing Rolland's personal mysticism (the "oceanic feeling") through texts and letters unavailable to Freud, Parsons (...) argues that Freud misinterpreted the oceanic feeling. In offering a fresh interpretation of Rolland's mysticism, Parsons constructs a new dialogical approach for psychoanalytic theory of mysticism which integrates culture studies, developmental perspectives, and the deep epistemological and transcendent claims of the mystics. (shrink)

Up-to-date and comprehensive, this practical best seller provides students with the basis for discovering their own guidelines for helping within the broad limits of professional codes of ethics and divergent theoretical positions. Respected authors Gerald Corey, Marianne Corey, and Cindy Corey raise what they consider to be central issues, present a range of diverse views on the issues, discuss their position, and provide opportunities for students to refine their thinking and develop an informed position. With new material in every (...) chapter and an emphasis on critical thinking, ISSUES AND ETHICS IN THE HELPING PROFESSIONS, 10th Edition, is useful for students as well as practicing professionals. This edition features MindTap®, the digital learning solution that helps instructors engage and transform today's students into critical thinkers and successful helpers. (shrink)

Most democratic countries either limit or deny altogether voting rights for people with cognitive impairments or mental health conditions. Against this weight of legal and practical exclusion, disability advocacy and developments in international human rights law increasingly push in the direction of full voting rights for people with cognitive impairments. Particularly influential has been the adoption by the UN of the Convention on the Rights of Persons with Disabilities in 2007. Article 29 declares that states must ‘ensure that persons with (...) disabilities can effectively and fully participate in political and public life on an equal basis with others, directly or through freely chosen representatives, including the right and opportunity for persons with disabilities to vote and be elected’. This article also argues for the right of all people to vote, including people with cognitive impairments, by adopting a uniquely strategic approach. Firstly, some of the strategic limitations of existing arguments in favour of extending the franchise are highlighted. Most such arguments are flawed because they run the risk of inviting disparaging philosophical commentary which compares disabled people to animals, or because they are based on implausible empirical claims, or because they inadvertently tie the case for voting rights for the disabled to other cases unlikely to ever enjoy widespread acceptance. This article, instead, justifies extending voting rights to all people with cognitive impairments based on a simple cost-benefit analysis that avoids all of these problems. (shrink)

Recent political philosophers have argued that criteria of social justice that defend distributing resources to individuals on the basis of the disadvantages of their natural endowments are disrespectful and disparaging. Clearly influenced by the social model of disability, Elizabeth Anderson and Thomas Pogge have recently defended criteria of social justice that distribute resources to people with disabilities on the basis of eliminating discrimination, not making up for so-called natural disadvantage. I argue that it is implausible to suggest that just entitlements (...) for people with disability can be secured solely by eliminating discrimination. Resources for people with disabilities must sometimes be justified on the grounds that some natural endowments pose disadvantages even in societies that do not discriminate. I argue further that there need be nothing at all disrespectful about this way of explaining disadvantage; nor have proponents of the social model of disability or political philosophers provided any compelling reasons for supposing that it is disrespectful. There is thus no motivation for Anderson's and Pogge's attempts to secure justice for people with disabilities by appealing solely to the imperative to eliminate discrimination. (shrink)

Many people, including many egalitarian political philosophers, professa belief in equality while enjoying high incomes of which they devotevery little to egalitarian purposes. The article critically examinesways of resolving the putative inconsistency in the stance of thesepeople, in particular, that favouring an egalitarian society has noimplications for behaviour in an unequal one; that what''s bad aboutinequality is a social division that philanthropy cannot reduce; thatprivate action cannot ensure that others have good lives; that privateaction can only achieve a ``drop in (...) the ocean''''; that private effortis not called for, since justice is a matter for the state to enforce;that private effort cannot remove the fundamental injustice, whichis inequality of power; and that private effort involves an unreasonablylarge psychological burden. (shrink)

Despite the numerous benefits associated with forgiveness, many individuals find it difficult to forgive. This is especially true in organizations, where forgiveness is rare and can be under-valued. Across two studies, we explore how to facilitate forgiveness within organizational contexts and in the aftermath of workplace unfairness. We examine whether individuals can reduce the “injustice gap” that can be created by violations and enhance forgiveness through expressive writing interventions—guided writing techniques that can be self-administered. Participants wrote about their reactions to (...) a fictional scenario or an actual workplace experience. Results indicate that expressive writing was associated with higher reported perceived resolution. Whereas negative emotions mediated this relationship in Study 1, positive emotions and perceived injustice mediated this relationship in Study 2. Perceived resolution also mediated the relationship between expressive writing and forgiveness. Theoretical, methodological, and practical implications are discussed. (shrink)

The Routledge Companion to Social and Political Philosophy is a comprehensive, definitive reference work, providing an up-to-date survey of the field, charting its history and key figures and movements, and addressing enduring questions as ...

This paper states that modern education and utopian discourse share one common trait, that of being structurally founded on the promise of human betterment. The changing relations between concepts of education and utopianism will be developed through conceptual analysis of the dynamics of the promise in their interweaving process. This shall be discussed through three main topics. The first is the appropriation of space in early modern education, with particular emphasis on the influence of print technology on framing a new (...) conception of educational spaces and practices. Second, the promise of the idea of progress in the Enlightenment period, which will become the further technological promise of a society-to-come, no longer spatially but temporally presented. Finally, the promise of autonomy through and against the modern subject, in which such autonomy is presented like the end of the journey through education, supposed that there is an end to such a journey. The key f... (shrink)

Hojjat Soofi develops a modified version of Martha Nussbaum’s capability approach, which he offers as a conception of dignity for people living with dementia.1 He argues that this modified version can address what he identifies as four main criticisms of the concept of dignity. The first and most substantial criticism was developed by Macklin: that appeals to ‘dignity’ add little to moral debates or to the rich field of existing moral values.1 Soofi’s account of dignity does not evade this criticism: (...) to the contrary, it represents another clear example of what Macklin complained about, namely, a moral proposal in which the concept of ‘dignity’ plays no substantive role. We have much to learn from Soofi’s rich account of how to ensure the flourishing or well-being of people living with dementia, but it has little to do with dignity as such. According to Soofi, Macklin’s argument is that ‘dignity’ is just another word for respect for persons or their autonomy. This is a rather truncated representation of Macklin’s argument, which is in fact broader. Her argument is that the concept of ‘dignity’ adds nothing to the vast array of rich moral values that already populate the field of ethics, mainly because it is a less precise restatement of these existing values.2 She explicitly …. (shrink)

Recent discussions of genetic enhancement have argued that unregulated access to genetic enhancement technology will have a mainly negative impact on equality, a development that an egalitarian approach to distributive justice should be concerned with and seek to address. I argue that the extent to which egalitarians should be concerned about unequal access to genetic enhancement therapies has been overplayed. Many of the genetic differences that exist between people, including those that arise from differential access to genetic enhancement technology, are (...) simply irrelevant to egalitarian concerns. I also argue that most commentators have failed to appreciate that an egalitarian-inspired program of equal access to genetic enhancement technology may not be altogether favourable for the genetically disadvantaged in any case. The true implications of egalitarian justice in the genetic future have not been adequately explored. (shrink)

This is the second of three volumes of posthumously collected writings of G. A. Cohen, who was one of the leading, and most progressive, figures in contemporary political philosophy. This volume brings together some of Cohen's most personal philosophical and nonphilosophical essays, many of them previously unpublished. Rich in first-person narration, insight, and humor, these pieces vividly demonstrate why Thomas Nagel described Cohen as a "wonderful raconteur." The nonphilosophical highlight of the book is Cohen's remarkable account of his first trip (...) to India, which includes unforgettable vignettes of encounters with strangers and reflections on poverty and begging. Other biographical pieces include his valedictory lecture at Oxford, in which he describes his philosophical development and offers his impressions of other philosophers, and "Isaiah's Marx, and Mine," a tribute to his mentor Isaiah Berlin. Other essays address such topics as the truth in "small-c conservatism," who can and can't condemn terrorists, and the essence of bullshit. A recurring theme is finding completion in relation to the world of other human beings. Engaging, perceptive, and empathetic, these writings reveal a more personal side of one of the most influential philosophers of our time. (shrink)

The gendered division of labor is the major cause of gender inequality with respect to the broad spectrum of resources, occupations, and roles. Although many feminists aspire to an equality of outcome where there are no significant patterns of gender difference across these dimensions, many have also argued that liberal theories of social justice do not have the conceptual tools to justify a direct attack on the gendered division of labor. Indeed, many critics argue that liberalism positively condones it, presuming (...) that it arises from the free choices of individuals, which must be respected. In this paper I will accept the feminist goal of equality of outcome across roles, occupations, income, and wealth, but will argue that liberal theories of justice are consistent with strong measures aimed at promoting such equality. I will show that liberalism has the conceptual resources to justify a concrete policy measure that goes considerably beyond the measures usually championed by feminists. The example I focus on is “daddy quotas,” which refers to the tagging of a significant part of parental leave for the exclusive use of fathers. (shrink)

A theory is presented to explain how accurate, single-joint movements are controlled. The theory applies to movements across different distances, with different inertial loads, toward targets of different widths over a wide range of experimentally manipulated velocities. The theory is based on three propositions. (1) Movements are planned according to “strategies” of which there are at least two: a speed-insensitive (SI) and a speed-sensitive (SS) one. (2) These strategies can be equated with sets of rules for performing diverse movement tasks. (...) The choice between SI and SS depends on whether movement speed and/or movement time (and hence appropriate muscle forces) must be constrained to meet task requirements. (3) The electromyogram can be interpreted as a low-pass filtered version of the controlling signal to the motoneuron pools. This controlling signal can be modelled as a rectangular excitation pulse in which modulation occurs in either pulse amplitude or pulse width. Movements to different distances and with loads are controlled by the SI strategy, which modulates pulse width. Movements in which speed must be explicitly regulated are controlled by the SS strategy, which modulates pulse amplitude. The distinction between the two movement strategies reconciles many apparent conflicts in the motor control literature. (shrink)

abstract In this paper I argue that the genetic manipulation of sexual orientation at the embryo stage could have a detrimental effect on the subsequent person's later capacity for autonomous agency. By focussing on an example of sexist oppression I show that the norms and expectations expressed with this type of genetic manipulation can threaten the development of autonomous agency and the kind of social environment that makes its exercise likely.