12/20/2023 0 Comments Robert schwartz death with dignity![]() Finally, some difficulties with Shepard's account of the evolutionary development of his kinematic constraint are considered. 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. First, I explore the analogy Shepard draws between internalized circadian rhythms and the supposed internalization of kinematic geometry. My primary focus is on the ecological validity of Shepard's kinematic constraint in the context of ordinary motion perception. 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. This paper examines issues concerning the need, nature, explanatory role, and justification for postulating such internalized constraints. 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. 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. An alternative paradigm, the symbolic model, championed most forcefully by Nelson Goodman, focuses attention on syntactic and semantic features of pictures. 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. ![]() The picture, being a geometrically sanctioned projection of its object, resembles it, or otherwise serves as a mimetic surrogate, “re-presenting” what it depicts. 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. ![]() In recent papers I have explored how two seemingly conflicting paradigms inform the conception and study of picture perception. ![]()
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