John Kulvicki

For the information theorist, the lawful generalizations that subsume instantiations of properties in the environment and instantiations of properties of perceptual representations determine the latter's content. Perceptual representations are also commonly thought to be isomorphic to what they represent, which presents the information theorist with a puzzle. What role could isomorphism play in perceptual representation when lawful generalizations determine content? I show that in order for the information that they carry to be available to cognition, perceptual representations must be isomorphic with respect to the constituent structure of the properties that they represent. Isomorphism therefore plays an important role in the information theorist's account of perceptual representation, even though it plays no role in determining content.

There is a growing consensus in the philosophical literature that sounds differ rather profoundly from colors. Colors are qualities, while sounds are particulars of some sort or other, such as events or pressure waves. A key motivation for this is that sounds seem to be transient, to evolve over time, to begin and end, while colors seem like stable qualities of objects' surfaces. I argue that sounds are indeed, like colors, stable qualities of objects. Sounds are not transient, and they do not seem to be, even though they are typically perceived transiently. In particular, sounds are dispositions of objects to vibrate in response to being stimulated. This stable property view of sounds aligns nicely with, and owes an inspirational debt to, reflectance physicalist accounts of color. The upshot is a unified picture of colors, sounds, and the perception thereof.

Our perceptual systems make information about the world available to our cognitive faculties. We come to think about the colors and shapes of objects because we are built somehow to register the instantiation of these properties around us. Just how we register the presence of properties and come to think about them is one of the central problems with understanding perceptual cognition. Another problem in the philosophy of perception concerns the nature of the properties whose presence we register. Among the perceptible properties are colors and shapes, for example, and there is a long philosophical tradition of drawing and refusing to draw metaphysical distinctions between them. This paper makes a claim about the information-theoretic approach to perceptual cognition in order to argue for a fundamentally epistemological distinction between colors and shapes. What makes shapes and colors seem so different to us is how we carry information about their presence around us. In particular, we can come to know more about the shapes on the basis of perceiving them than we can come to know about the colors. One interesting feature of how this distinction is drawn is that it partially vindicates Locke’s claim that our ideas of primary qualities like shapes resemble them in ways our ideas of colors do not

Long-exposure photographs present distinctive philosophical challenges. They do not quite look like things in motion. Experiences of such photos take time, but not in a way that mimics the time of the motion depicted. In fact, it would not be off base to worry that these photos fail, strictly speaking, to depict motion or things-in-time. And if they fail to depict motion, then it is an interesting question what, if anything, they succeed in depicting. These timeless traces of temporal patterns are thus a challenge to how we understand pictures. In addition to being representations, however, such photographs are recordings. They witlessly register aspects of scenes in a manner that can be replayed. The following shows that recording is a valuable and neglected tool for investigating representational practices. Aspects of what photos record also figure in their representational contents, and this provides a way of approaching the photography of events in time. This article proceeds by framing, and then answering, three questions. First, what do photos record about temporal patterns? Second, which aspects of such recordings also show up in photos’ representational contents? And third, do these pictures depict, rather than merely represent, such temporal patterns?

The nature of representation is a central topic in philosophy. This is the first book to connect problems with understanding representational artifacts, like pictures, diagrams, and inscriptions, to the philosophies of science, mind, and art. Can images be a source of knowledge? Are images merely conventional signs, like words? What is the relationship between the observer and the observed? In this clear and stimulating introduction to the problem John V. Kulvicki explores these questions and more. He discusses: the nature of pictorial experience and "seeing in" recognition, resemblance, pretense, and structural theories of depiction images as aids to scientific discovery and understanding mental imagery and the nature of perceptual content photographs as visual prostheses. In so doing he assesses central problems in the philosophy of images, such as how objects we make come to represent other things, and how we distinguish kinds of representation - pictures, diagrams, graphs - from one another. Essential reading for students and professional philosophers alike, the book also contains chapter summaries, annotated further reading, and a glossary.

Problems concerning scientists’ uses of representations have received quite a bit of attention recently. The focus has been on how such representations get their contents and on just what those contents are. Less attention has been paid to what makes certain kinds of scientific representations different from one another and thus well suited to this or that epistemic end. This article considers the latter question with particular focus on the distinction between images and graphs on the one hand and descriptions and related representations on the other. *Received January 2008; revised September 2009. †To contact the author, please write to: Department of Philosophy, Dartmouth College, Hanover, NH 03755; e‐mail: [email protected].

Analog representation is often cast in terms of an engineering distinction between smooth and discrete systems. The engineering notion cuts across interesting representational categories, however, so it is poorly suited to thinking about kinds of representation. This paper suggests that analog representations support a pattern of interaction, specifically open-ended searches for content across levels of abstraction. They support the pattern by sharing a structure with what they represent. Continuous systems that satisfy the engineering notion are exemplars of this kind because they are uninterpretable unless they are structure-preserving. Analog representations, so understood, include pictures, images, diagrams, and most graphs. This conception of analogicity also fits well with a line of thought about what makes perceptual states distinctive: they satisfy a “parts principle”