Robert Schwartz

No one need deny the importance of language to thought and cognition. At the same time, there is a tendency in studies of mind and mental functioning to assume that properties and principles of linguistic, or language-like, forms of representation must hold of forms of thought and representation in general. Consideration of a wider range of symbol systems shows that this is not so. In turn, various claims and arguments in cognitive theory that depend on assumptions applicable only to linguistic systems, do not go through or become difficult to state in a manner that makes them both interesting and plausible

_Perception presents classic essays on the conceptual and theoretical problems in the study of vision. In a style that is accessible to the non-expert, the volume lays out core issues in the theory of vision and then sets up a dialogue on the topics among philosophers and psychologists, past and present._ Offers an accessible introduction to perception through key readings. Presents a dialogue among philosophers and psychologists on the science of perception. Contains a comprehensive introduction and provides suggestions for further reading. Useful for readers interested in philosophy, psychology, cognitive science, computer vision, and visual science.

At first glance, the first informed consent case to be decided by the High Court of Australia appears to be little more than a clear and simple description of the substantive law accepted in most American jurisdictions - although that is no small accomplishment in and of itself. In Rogers v. Whitaker, the highest court in Australia succinctly and persuasively rejected informed consent as a species of battery law, accepted it as a form, of ordinary professional negligence law, and adopted the “American” patient-oriented standard for measuring the breach of a healthcare professional's duty to her or his patients. On second look, however, the opinion is an even more significant one because it reveals that the law of informed consent is now based on principles broad enough to create a duty on the part of healthcare providers to offer adequate health education to all of their patients. In Implicitly recognizing the physician's duty to educate her or his patients, the High Court's judgment is consistent with a view increasingly held In the medical and ethical communities that teaching patients about how to maintain their health is just as much a part of the doctor's function as diagnosing and treating disease. It may have taken 2,500 years for medicine to progress from, the Hippocratic notion that physicians should apply treatment to patients who are kept in blissful Ignorance of their condition and Its remedy, but there Is little doubt that medicine finally has entered a post-Hippocratic era.

In recent papers [1997, in press] I have explored how two seemingly conflicting paradigms inform the conception and study of picture perception. The dominant paradigm, one especially favored by vision theorists, claims that seeing a pictorial representation of an object is, with qualifications, like seeing the object itself. The picture, being a geometrically sanctioned projection of its object, resembles it, or otherwise serves as a mimetic surrogate, “re-presenting” what it depicts [Danto, 1982]. Accordingly, pictorial representation is at its best when, as in trompe l’oeil paintings, viewers can not tell the picture, the stand in or substitute, from the real thing. An alternative paradigm, the symbolic model, championed most forcefully by Nelson Goodman [1968], focuses attention on syntactic and semantic features of pictures. On this account, pictures are importantly allied with other forms of representation, including languages, maps, and music notation, and picture perception is to be understood in this context.

Roger Shepard's proposals and supporting experiments concerning evolutionary internalized regularities have been very influential in the study of vision and in other areas of psychology and cognitive science. This paper examines issues concerning the need, nature, explanatory role, and justification for postulating such internalized constraints. In particular, I seek further clarification from Shepard on how best to understand his claim that principles of kinematic geometry underlie phenomena of motion perception. My primary focus is on the ecological validity of Shepard's kinematic constraint in the context of ordinary motion perception. First, I explore the analogy Shepard draws between internalized circadian rhythms and the supposed internalization of kinematic geometry. Next, questions are raised about how to interpret and justify applying results from his own and others' experimental studies of apparent motion to more everyday cases of motion perception in richer environments. Finally, some difficulties with Shepard's account of the evolutionary development of his kinematic constraint are considered. Key Words: apparent motion; circadian rhythms; constraints; ecological validity; evolution; internalizated regularities; kinematic principle.

Recently it has been argued that a model of directed perception provides an alternative to both indirect and direct accounts of the nature of vision. An examination of this proposal serves as a basis for challenging the meaningfulness and empirical import of the theoretical and ontological differences said to separate these models. Although focusing on James Cutting's work, the analysis is meant to speak more generally to the supposed significance of the distinctions among indirect, direct, and directed theories of perception

In many countries the debate over the role that physicians may play in ending life has been limited to the judiciary and other law making institutions, professional medical organizations; and academics. Because of their multidisciplinary and diverse membership, ethics committees may be a particularly appropriate venue through which these discussions can be expanded to include a much larger community. In addition, ethics committees generally act in only advisory capacities because they do not actually make decisions, so they may provide a forum for open discussions in ways that the court and the medical boards cannot

As ethics committees become involved in discussing the propriety of euthanasia and assisted suicide, and as healthcare providers begin to seriously consider whether they might ever have a role in hastening the dying process, many have looked to The Netherlands as the only real example of a nation that permits euthanasia in limited circumstances. Unfortunately, partisans in the Dutch debate have often written about the Dutch experience as advocates rather than as neutral observers. Some have argued that euthanasia, which, they claim, is rarely actually practiced, is universally accepted within The Netherlands; others have reported that the Dutch social fabric has been rended irreparably by what they claim, is a practice far more widespread than is generally understood. The debate in the United States has also been colored by a misunderstanding of the legal regulation of euthanasia in The Netherlands

Over the past year the debate over physician-assisted death has been waged in several courts and legislatures, and before at least one electorate as well. Measure 16, the Oregon Death With Dignity initiative that would permit physician-assisted suicide in some circumstances, was approved by the electorate; but it remains on hold while a permanent injunction issued against it by a Federal judge is reviewed by the United States Court of Appeals. Another Federal court judge's decision that the Washington statute criminalizing physician-assisted suicide was unconstitutional when applied to the case of a competent terminally ill patient in intractable pain, was reversed by a three judge panel of that same United States Court of Appeals