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Percepts

A purist would insist that there are no lines in nature, not even in a single hair--only contours, horizons--rejecting the fact that the visual system tends to see contours as linear percepts. According to the Gestalt psychologist Rudolf Arnheim, percepts give us general sensory categories or qualities, significant structural patterns that stand for the particular stimulus material out there in time, space, and light. We see, for instance, "dog-ness" rather than the "raw material" dog, as such. We assimilate the stimulus "apple" as a pattern of general sensory qualities: "roundness," "solidness," "greenness" (or "redness," as the case may be). "Squareness" seems to come with the stimulus square drawn on the paper or blackboard; and so on. Paraphrasing the old saying about not being able to see the forest for the trees, Arnheim seems to be telling us that, if some incredible type of thinking isn't going on in the whole visual apparatus, the "forest" of the world would be an even more confused panorama than it is! Which leads Arnheim to declare that "eyesight is insight." Meaning that perceiving is a spontaneous type of thinking, a formation of perceptual concepts--not concepts in the usual application of the term (that is, ideas, theories, spectral entities), but in a creative activity of the mind, a thinking with forms, shapes, images. So then, "representational concepts," as Arnheim calls them, are an extension of this into the medium itself, whatever its properties may be (that of pencil, paint, glass, stone, wood, metal, and so forth), in the process of creating a work of art. Very likely Arnheim would agree with Henri Focillon's statement about the artist's "special privilege," which, he says, "is to recollect, to think, to feel in forms."

The perceptual psychologist Margaret A. Hagen . . . . offers what she calls a "generative theory of perception" that would embrace much more of what she believes perceiving and the making or art have involved across styles of art from the "rock art" of Altamira of 10,000-12,000 years ago, to ancient Egyptian art, to modern art--not a theory of art, she insists, but "a theory of the nature of the perceptual information that makes successful picture making possible." An adequate theory , according to her reasoning, must conceive of visual perception as consisting of three interrelated components, three choices, that confronted the Egyptian artist and that still confront the modern painter and graphic artist:

(1) Station point or points (near/distant, central/oblique), an inherited and/or chosen projection system, extending to what is called perspective and even to "mixed systems";

(2) Relative degree of emphasis on variant (immediate, transitory) versus invariant (ideal, timeless) features of the object or objects.

(3) Relative emphasis on two- versus three-dimensional components of objects and of the total pictorial environment, inclusion/exclusion, degree of transformation, abstraction, distortion, and the like . . . .

[Harlan, Calvin. Vision & Invention, An Introduction to Art Fundamentals. Englewood Cliffs, NJ: Prentice-Hall, 1986.]

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