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Illusion - Is Seeing Really Believing?
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Illusion - Is Seeing Really Believing (1998)(Marshall Media)[Mac-PC].iso
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00212_Field_212.txt
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1996-12-31
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DRAWING AND PERCEPTUAL
CONSTANCY
To make a representational
drawing of a three-dimensional
object or scene, we must draw a
picture that will give the
observer a retinal image similar
to the one obtained in viewing
the object or scene itself. But
we do not directly perceive our
retinal images. Instead, we
spontaneously perceive a world
of objects and planes that
departs considerably from the
size and shape relations given
within the image. Thus, if we
draw what we perceive, we will
not draw in perspective.
The major difficulty in
drawing--at least in drawing by
copying from the scene--is that
we are foiled by the
achievements of our
perceptions, which accord so
well with the actual
characteristics of objects
instead of with the
characteristics of the
stimulation reaching the eye.
This is particularly noticeable
in the art of children. If
children are asked to copy a
table while standing at one end
of it, they tend frequently to
draw what they perceive: a
rectangular surface the far end
of which is equal to the near
end, with nonconverging sides
and length not foreshortened.
Plates on the table are likely to
be drawn as circles, not
ellipses.