Aggleton & Brown have built a convincing case that hippocampus-related circuits may be involved in thalamic amnesia. It remains to be established, however, that their model represents a distinct neurological system, that the distinction between recall and familiarity captures the roles of these pathways in episodic memory, or that there are no other systems that contribute to the signs of amnesia associated with thalamic disease.

Christine M. Korsgaard is Arthur Kingsley Porter Professor of Philosophy at Harvard University. She was educated at the University of Illinois and received a Ph.D. from Harvard. She has held positions at Yale, the University of California at Santa Barbara, and the University of Chicago, and visiting positions at Berkeley and UCLA. She is a member of the American Philosophical Association and a fellow of the American Academy of Arts and Sciences. She has published extensively on Kant, and (...) about moral philosophy and its history, the theory of practical reason, the philosophy of action, and personal identity. Her two published books are The Sources of Normativity (1992) and Creating the King- dom of Ends (1996). (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Aviation and the Aerial View:Le Corbusier's Spatial Transformations in the 1930s and 1940sM. Christine Boyer (bio)Part One: The Aerial ViewAviation and Equipment. A London publishing house, The Studio, Ltd, sent Le Corbusier a letter in January 1935, inquiring whether he would be interested in collaborating on a new series of books to be titled The New Vision. The promoters explained that each book in the series would be (...) devoted to a unique event in industrial design, with specific attention paid to the designers, their aims, and the potential these designs held for social and human development. They would begin the series with a volume on the airplane. Le Corbusier was asked to write an introductory essay, supply captions for the images they had already collected, and offer a few suggestions for additional illustrations.1Accepting the invitation, Le Corbusier in his reply, however, transformed the project: instead of the word "airplane" he preferred "aviation," by which he meant all the prodigious phenomena opening vast new horizons in space and influencing the future of "equipment" in the broadest sense of the word.2 Already in Precisions (1930) he had written, "I replace the word 'urbanism' by the term 'equipment.' I have already replaced the term 'furniture' by that of 'equipment.' Such stubbornness shows well that we are purely and simply claiming tools for work, for we do not want to die of hunger facing the embroidered flowerbeds of aesthetic urbanism" [143]. To his bag of equipment, Le Corbusier now adds "aviation," a tool of modern communication forging new modes of exchange and new links between nations.3The material subsequently sent by the publishing house to Le Corbusier also met with lukewarm reception: he favored more lively documentation such as the view from an airplane as it flew over cities—vast open terrain, the sea, and the forests. And he wanted more picturesque treatment of the lives of aviators, their psychological and social attitudes including analysis of the great aerial routes being drawn between Europe and America, Africa, or Asia. The publishing house was unable to fulfill Le Corbusier's [End Page 93] expectations, reminding him that their focus was limited to "the airplane" and that they expected to receive all his material by May.4What did Le Corbusier mean by "aviation" and the "epic of the air," a phrase he used in the preface of the subsequent book Aircraft (1935)? What new horizons did aviation open and how did this affect the perception of space and the process of reading the terrain as a two-dimensional map or a plan? And what did aviation have to do with "equipment"? Just the year before Le Corbusier had seen the Exposition de l'Aéronautique in Milan for which Mussolini offered the maxim: "Aviation is grand, small, or nothing at all, depending on whether public awareness of aviation is grand, small, or nothing at all."5 Le Corbusier, ever the great publicist, accepted the challenge to spread the meaning of "aviation" in the inclusive sense of the word entailing adventure and service, organization, and machinery.The rapid growth of aviation during the interwar period was mercurial, dramatically reshaping perception of the world and of space. There were daring flights of aviators challenging the breath of oceans and deserts, the heights of Everest, the length of Africa, the uncharted terrain of the North and South Poles. The airplane not only internationalized cartography; it was a tool for exploring and controlling the colonies. While aerial photography, which recorded in precise detail the realistic shape of landmasses, coastlines, seas, deserts, and mountains, perfected the process of mapmaking and enriched the documentary archive of the planet.Yet even more stunning, aviation continually shrunk the size of the globe after the initial KLM flight between Amsterdam and Jakarta took off in 1924. Then the time needed to navigate the 9000 miles was 55 days; within five years it had been reduced to a mere 12 days. A world map criss-crossed with national air routes came into view. In the 1930s civil airlines began to offer passenger and mail service between London and the Middle East, then on to India and... (shrink)

Ethical concepts are, or purport to be, normative. They make claims on us: they command, oblige, recommend, or guide. Or at least when we invoke them, we make claims on one another; but where does their authority over us - or ours over one another - come from? Christine Korsgaard identifies four accounts of the source of normativity that have been advocated by modern moral philosophers: voluntarism, realism, reflective endorsement, and the appeal to autonomy. She traces their history, showing (...) how each developed in response to the prior one and comparing their early versions with those on the contemporary philosophical scene. Kant's theory that normativity springs from our own autonomy emerges as a synthesis of the other three, and Korsgaard concludes with her own version of the Kantian account. Her discussion is followed by commentary from G. A. Cohen, Raymond Geuss, Thomas Nagel, and Bernard Williams, and a reply by Korsgaard. (shrink)

Agency and identity -- Necessitation -- Acts and actions -- Aristotle and Kant -- Agency and practical identity -- The metaphysics of normativity -- Constitutive standards -- The constitution of life -- In defense of teleology -- The paradox of self-constitution -- Formal and substantive principles of reason -- Formal versus substantive -- Testing versus weighing -- Maximizing and prudence -- Practical reason and the unity of the will -- The empiricist account of normativity -- The rationalist account of normativity (...) -- Kant on the hypothetical imperative -- Against particularistic willing -- Deciding and predicting -- Autonomy and efficacy -- The function of action -- The possibility of agency -- Non-rational action -- Action -- Attribution -- The psychology of action -- Expulsion from the garden : the transition to humanity -- Instinct, emotion, intelligence, and reason -- The parts of the soul -- Inside or outside -- Pull yourself together -- The constitutional model -- Models of the soul -- The city and the soul -- Platonic virtues -- Justice : substantive, procedural, and platonic -- Kant and the constitutional model -- Defective action -- The problem of bad action -- Being governed by the wrong law -- Or five bad constitutions -- Conceptions of evil -- Degrees of action -- Integrity and interaction -- Deciding to be bad -- The ordinary cases -- Dealing with the disunified -- Kant's theory of interaction -- My reasons -- Deciding to treat someone as an end in himself -- Interacting with yourself -- How to be a person -- What's left of me? (shrink)

Christine Korsgaard has become one of the leading interpreters of Kant's moral philosophy. She is identified with a small group of philosophers who are intent on producing a version of Kant's moral philosophy that is at once sensitive to its historical roots while revealing its particular relevance to contemporary problems. She rejects the traditional picture of Kant's ethics as a cold vision of the moral life which emphasises duty at the expense of love and value. Rather, Kant's work is (...) seen as providing a resource for addressing not only the metaphysics of morals, but also for tackling practical questions about personal relations, politics, and everyday human interaction. This collection contains some of the finest current work on Kant's ethics and will command the attention of all those involved in teaching and studying moral theory. (shrink)

Christine M. Korsgaard is one of today's leading moral philosophers: this volume collects ten influential papers by her on practical reason and moral psychology ...

Content skepticism about practical reason is doubt about the bearing of rational considerations on the activities of deliberation and choice. Motivational skepticism is doubt about the scope of reason as a motive. Some people think that motivational considerations alone provide grounds for skepticism about the project of founding ethics on practical reason. I will argue, against this view, that motivational skepticism must always be based on content skepticism. I will not address the question of whether or not content skepticism is (...) justified. I want only to establish the fact that motivational skepticism has no independent force. (shrink)

This paper criticizes two accounts of the normativity of practical principles: the empiricist account and the rationalist or realist account. It argues against the empiricist view, focusing on the Humean texts that are usually taken to be its locus classicus. It then argues both against the dogmatic rationalist view, and for the Kantian view, through a discussion of Kant's own remarks about instrumental rationality in the second section of the Groundwork. It further argues that the instrumental principle cannot stand alone. (...) Unless there are normative principles directing us to the adoption of certain ends, there can be no requirement to take the means to our ends. The familiar view that the instrumental principle is the only requirement of practical reason is incoherent. (shrink)

Not until the twentieth century did science come to be regarded as fundamentally technical in nature. A technical field, after all, meant not just a difficult one, but one relying on concepts and vocabulary that matter only to specialists. The alternative, to identify science with an ideal of public reason, attained its peak of influence in the late nineteenth century. While the scale and applicability of science advanced enormously after 1900, scientists have more and more preferred the detached objectivity of (...) service to bureaucratic experts over the cultivation of an engaged public. This reshaping of science, which has been both celebrated and condemned, provided a stimulus to the incipient field of history of science, and it remains a key historical problem. (shrink)

Different types of consent are used to obtain human biospecimens for future research. This variation has resulted in confusion regarding what research is permitted, inadvertent constraints on future research, and research proceeding without consent. The National Institutes of Health Clinical Center's Department of Bioethics held a workshop to consider the ethical acceptability of addressing these concerns by using broad consent for future research on stored biospecimens. Multiple bioethics scholars, who have written on these issues, discussed the reasons for consent, the (...) range of consent strategies, and gaps in our understanding, and concluded with a proposal for broad initial consent coupled with oversight and, when feasible, ongoing provision of information to donors. This article describes areas of agreement and areas that need more research and dialogue. Given recent proposed changes to the Common Rule, and new guidance regarding storing and sharing data and samples, this is an important and tim.. (shrink)

Aristotle believes that an agent lacks virtue unless she enjoys the performance of virtuous actions, while Kant claims that the person who does her duty despite contrary inclinations exhibits a moral worth that the person who acts from inclination lacks. Despite these differences, this chapter argues that Aristotle and Kant share a distinctive view of the object of human choice and locus of moral value: that what we choose, and what has moral value, are not mere acts, but actions: acts (...) done for the sake of ends. Morally good actions embody a kind of intrinsic value that inspires us to do them from duty (in Kant) or for the sake of the noble (in Aristotle). The chapter traces the difference in their attitudes about doing one's duty with pleasure to a difference in their attitudes towards pleasure itself: Aristotle sees it as a perception of the good, while Kant thinks of it as mere feeling. (shrink)

One of the great difficulties with Kant’s moral philosophy is that it seems to imply that our moral obligations leave us powerless in the face of evil. Kant’s theory sets a high ideal of conduct and tells us to live up to that ideal regardless of what other persons are doing. The results may be very bad. But Kant says that the law "remains in full force, because it commands categorically" (G, 438-39/57).* The most weI1—known example of...

In this paper I trace the development of one of the central debates of late twentieth-century moral philosophy—the debate between realism and what Rawls called “constructivism.” Realism, I argue, is a reactive position that arises in response to almost every attempt to give a substantive explanation of morality. It results from the realist’s belief that such explanations inevitably reduce moral phenomena to natural phenomena. I trace this belief, and the essence of realism, to a view about the nature of concepts—that (...) it is the function of all concepts to describe reality. Constructivism may be understood as the alternative view that a normative concept refers schematically to the solution to a practical problem. A constructivist account of a concept, unlike a traditional analysis, is an attemptto work out the solution to that problem. I explain how the philosophies of Kant and Rawls can be understood on this model. (shrink)

Then you have a look around, and see that none of the uninitiated are listening to us—I mean the people who think that nothing exists but what they can grasp with both hands; people who refuse to admit that actions and processes and the invisible world in general have any place in reality.

Purpose/methods: This study investigated the relationship between ethics education and training, and the use and usefulness of ethics resources, confidence in moral decisions, and moral action/activism through a survey of practicing nurses and social workers from four United States (US) census regions. Findings: The sample (n = 1215) was primarily Caucasian (83%), female (85%), well educated (57% with a master's degree). no ethics education at all was reported by 14% of study participants (8% of social workers had no ethics education, (...) versus 23% of nurses), and only 57% of participants had ethics education in their professional educational program. Those with both professional ethics education and in-service or continuing education were more confident in their moral judgments and more likely to use ethics resources and to take moral action. Social workers had more overall education, more ethics education, and higher confidence and moral action scores, and were more likely to use ethics resources than nurses. Conclusion: Ethics education has a significant positive influence on moral confidence, moral action, and use of ethics resources by nurses and social workers. (shrink)

To later generations, much of the moral philosophy of the twentieth century will look like a struggle to escape from utilitarianism. We seem to succeed in disproving one utilitarian doctrine, only to find ourselves caught in the grip of another. I believe that this is because a basic feature of the consequentialist outlook still pervades and distorts our thinking: the view that the business of morality is to bring something about . Too often, the rest of us have pitched our (...) protests as if we were merely objecting to the utilitarian account of what the moral agent ought to bring about or how he ought to do it. Deontological considerations have been characterized as “side constraints,” as if they were essentially restrictions on ways to realize ends. More importantly, moral philosophers have persistently assumed that the primal scene of morality is a scene in which someone does something to or for someone else. This is the same mistake that children make about another primal scene. The primal scene of morality, I will argue, is not one in which I do something to you or you do something to me, but one in which we do something together. The subject matter of morality is not what we should bring about, but how we should relate to one another. If only Rawls has succeeded in escaping utilitarianism, it is because only Rawls has fully grasped this point. His primal scene, the original position, is one in which a group of people must make a decision together. Their task is to find the reasons they can share. (shrink)

Plato and Kant advance a constitutional model of the soul, in which reason and appetite or passion have different structural and functional roles in the generation of motivation, as opposed to the familiar Combat Model in which they are portrayed as independent sources of motivation struggling for control. In terms of the constitutional model we may explain what makes an action different from an event. What makes an action attributable to a person, and therefore what makes it an action, is (...) that it issues from the person''s constitution, and therefore from the person as a whole, rather than from some force working on or in the person. This in turn implies an account of what makes an action good: what makes an action good is that it is deliberated upon and chosen in a way that unifies the person into a constitutional system. Through deliberative action we constitute ourselves as unified agents. Platonic justice and Kant''s categorical imperative are shown to be normative standards for action because they are principles of self-constitution. (shrink)

In Self-Constitution, I argue that the principles governing action are “constitutive standards” of agency, standards that arise from the nature of agency itself. To be an agent is to be autonomousl...

Beginning with liberalism's foundational idea of moral equality as the basis for treating people with equal concern and respect, Christine Koggel offers a modified account of what makes human beings equal and what is needed to achieve equality. Koggel utilizes insights from care ethics but switches the focus from care as a moral response within personal relationships to the broader network of relationships within which care is given or withheld. The result is an account of moral personhood and agency (...) that is richer than the view propounded by liberal theory and care ethics. This exciting and original work challenges theoretical resistance to the idea that relationships are relevant to an understanding of equality, and it provides an opening to a critical analysis of relationships and care that informs and transforms our understanding of what is needed to treat all people with equal concern and respect. (shrink)

This paper argues for a conception of the natural rights of non-human animals grounded in Kant’s explanation of the foundation of human rights. The rights in question are rights that are in the first instance held against humanity collectively speaking—against our species conceived as an organized body capable of collective action. The argument proceeds by first developing a similar case for the right of every human individual who is in need of aid to get it, and then showing why the (...) situation of animals is similar. I first review some of the reasons why people are resistant to the idea that animals might have rights. I then explain Kant’s conception of natural rights. I challenge the idea that duties of aid and duties of kindness to animals fit the traditional category of “imperfect duties” and argue that they are instead cases of “imperfect right.” I explain how you can hold a right against a group, and why it is legitimate to conceive of humanity as such a group. I then argue that Kant’s account of the foundation of property rights is grounded in a conception of the common possession of the Earth that grounds a right to aid and the rights of animals to be treated in ways that are consistent with their good. Finally, I return to the objections to the idea that animals have rights and offer some responses to them. (shrink)

Legal systems divide the world into persons and property, treating animals as property. Some animal rights advocates have proposed treating animals as persons. Another option is to introduce a third normative category. This raises questions about how normative categories are established. In this article I argue that Kant established normative categories by determining what the presuppositions of rational practice are. According to Kant, rational choice presupposes that rational beings are ends in themselves and the rational use of the earth’s resources (...) presupposes that human beings have rights. I argue that rational choice also presupposes that any being for whom things can be good or bad must be regarded as an end in itself, and that the use of the world’s resources presupposes that any being who depends on those resources has rights. Although the other animals do not engage in rational practice, our own rational practice requires us to give them standing. (shrink)

Background: Little is known about what factors may contribute to the growth of a consultation service or how a practice may change or evolve across time. Methods: This study examines data collected from a busy ethics consultation service over a period of more than two decades. Results: We report a number of longitudinal findings that represent significant growth in the volume of ethics consultation requests from 19 in 1990 to 551 in 2013, as well as important changes in the patient (...) population for which ethics help is requested. The findings include (1) a steady growth in requests from primary care providers (e.g., physicians and nurses), as well as increases in ancillary services (e.g., social workers); (2) a decrease in length of stay (days) before ethics help is requested; (3) an increase in the reasons that individuals ask for help from ethics; (4) an upsurge in consults requests from areas outside the intensive care unit (ICU); (5) a decrease in patients that died during hospitalization (e.g., live discharges); and (6) growth in the numbers of patients lacking decision-making capacity. Conclusions: We believe the increases in consult requests reflect appropriate and necessary growth because recent consultations have also been associated with consultations requiring (7) additional interventions and (8) reasonably high time intensity scores. (shrink)

The use of the English word “reason” in all of these contexts, and the way we translate equivalent terms from other languages, suggests a connection, but what exactly is it? Aristotle and Kant’s conception of what practical reasons are, I believe, can help us to answer this question, by bringing out what is distinctive, and distinctively active, about acting for a reason. That, at least, is what I am going to argue.

Kant holds that the good will is a source of value, In the sense that other things acquire their values from standing in an appropriate relation to it. I argue that aristotle holds a similar view about contemplation, And that this explains his preference for the contemplative life. They differ about what the source of value is because they differ about which kind of activity, ethical or contemplative, discovers meaning and purpose in the world.

In this paper, a response to Ed Levy's discussion of medical quantification, I reflect on the ambitions of my book Trust in Numbers. I explore the idealized method of randomized clinical trials, revealed in his case study, as a social technology, one endowed with a persuasive scientific rationale but shaped also by political and social demands. The scholarly study of quantification requires not a choice between blind admiration and sweeping rejection, but a nuanced understanding. This should take into account not (...) only the cognitive aspects of science, but also its role in relation to institutions and customs, examined with some specificity. While history is narrowed and distorted when it is written to support a position on some present issue, historical and social studies of science should at least provide tools of criticism. For this, the historian of science must look beyond narrow communities of specialists, and seek a wider perspective on science as an administrative tool and a bearer of cultural and political values. (shrink)

A contribution to a panel on ethics and animals forthcoming in The Harvard Review of Philosophy.

Accounts of human beings as essentially social have had a long history in philosophy as reflected in the Ancient Greeks; in African and Asian philosophy; in Modern European thinkers such as Mary Wo...

ExtractThe idea that all the entities in the world may be, for legal and moral purposes, divided into the two categories of ‘persons’ and ‘things’ comes down to us from the tradition of Roman law. In the law, a ‘person’ is essentially the subject of rights and obligations, while a thing may be owned as property. In ethics, a person is an object of respect, to be valued for her own sake, and never to be used as a mere means (...) to an end, while a thing has only a derivative value, and may be used as a means to some person's ends. This bifurcation is unfortunate because it seems to leave us with no alternative but to categorize everything as either a person or a thing. Yet some of the entities that give rise to the most vexing ethical problems are exactly the ones that do not seem to fit comfortably into either category. For various, different, kinds of reasons, it seems inappropriate to categorize a fetus, a non-human animal, the environment, or an object of great beauty, as a person, but neither does it seem right to say of such things that they are to be valued only as means.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.PERSONHOOD, ANIMALS, AND THE LAWVolume 12, Issue 34Christine M. KorsgaardDOI: https://doi.org/10.1017/S1477175613000018Your 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. PERSONHOOD, ANIMALS, AND THE LAWVolume 12, Issue 34Christine M. KorsgaardDOI: https://doi.org/10.1017/S1477175613000018Available 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. PERSONHOOD, ANIMALS, AND THE LAWVolume 12, Issue 34Christine M. KorsgaardDOI: https://doi.org/10.1017/S1477175613000018Available 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. (shrink)

You are the kind of entity for whom things can be good or bad. This is one of the most important facts about you. It provides you with the grounds for taking a passionate interest in your own life, for you are deeply concerned that things should go well for you. Presumably, you also want to do well, but that may be in part because you think that doing well is good for you, and that your life would be impoverished (...) if you did not. But even if your interest in doing well is completely independent of any reference to your own condition, it probably depends on the thought that there are other entities, entities who are dependent upon you or affected by you, for whom things can be good or bad. It is only because there are entities like you, entities for whom things can be good or bad, that anything is important at all. If there were no entities for whom things can be good or bad, nothing would matter. (shrink)

This paper examines an application of epistemic injustice not fully explored in the literature. How does epistemic injustice function in broader contexts of relationships within countries between colonizers and colonized? More specifically, what can be learned about the ongoing structural aspects of hermeneutical injustice in Canada’s settler history of the forced assimilation of Indigenous peoples and the resultant erasing and marginalizing of Indigenous histories, languages, laws, traditions, and practices? In this paper, I use insights from Canada’s Truth and Reconciliation Commission (...) report to challenge dominant understandings of reconciliation, reciprocity, respect for agency, and the rule of law in settler nations. In its retrieval of the richness and diversity of Indigenous collective interpretive resources, both past and present, Canada’s Truth and Reconciliation Commission draws on a broad and full account of relationships that have shaped Indigenous lives and communities, non-Indigenous lives and communities, the interactions of Indigenous and non-Indigenous peoples and communities, and the relationships of all of these to and through the state. (shrink)

This paper examines college athletes’ perceived support for concussion reporting from coaches and teammates and its variation by year-in-school, finding significant differences in perceived coach support. It also examines the effects of perceived coach support on concussion reporting behaviors, finding that greater perceived coach support is associated with fewer undiagnosed concussions and returning to play while symptomatic less frequently in the two weeks preceding the survey. Coaches play a critical role in athlete concussion reporting.

Concussion is a form of traumatic brain injury that has been defined as a “trauma-induced alteration in mental status that may or may not involve loss of consciousness.” Terms such as getting a “ding” or getting your “bell rung” are sometimes used as colloquialisms for concussion, but inappropriately downplay the seriousness of the injury. It is estimated that between 1.6 and 3.8 million concussions occur annually in the United States as a result of participation in sports or recreational activities. To (...) date, there are no objective, biological markers for concussion; rather, the current diagnosis of concussion is dependent upon symptom reporting by the athlete. In the acute phase, concussions can result in a broad spectrum of symptoms that can be transient or last for days, weeks, or even months. Symptom prolongation is generally referred to as post-concussion syndrome. (shrink)

State concussion laws and sport-league policies are important tools for protecting public health, but also present implementation challenges. Both state laws and league policies often require athletes provide written acknowledgement of having received concussion-related information and/or of their responsibility to report concussion-related symptoms. This paper examines these requirements in two ways: an analysis of the variation in state laws and sport-league policies and a study of their effects in a cohort of collegiate football players.