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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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00182_Text_res15t.txt
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1997-02-04
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A second weakness of the
theory is that the preferred
perception does not always
seem to support the theoryΓÇÖs
predictions. In the case of
interposition of unfamiliar,
irregular shapes, like the
circle and "rectangle" seen
earlier, for example, the
perception of depth seems no
simpler than the perception of
two shapes in the same plane,
although we tend to perceive
the former. Gaetano Kanizsa of
the University of Trieste has
also found examples of figures
that seem to contradict the
prediction of the simplicity-
preference theory.
The simplicity-preference
theory of depth perception is of
course one in which depth is
achieved on the basis of a built-
in predisposition of the
nervous system rather than on
past experience. Presumably, a
brain that is so organized as to
lead to simpler perceptual
outcomes will have an
evolutionary advantage. It is
not clear, however, whether
this is because of the economy
of the encoding process or
because whichever percept can
be more efficiently encoded is
more likely to represent what is
actually there in the world. In
any event, while this theory
implies innate determination
of perception, it is not the same
as one that says that each
particular pictorial cue is an
innate sign of depth. In other
words, what is innate
according to this theory is the
general tendency of mind to
prefer perceptions that are
simple rather than a tendency
to interpret a specific pictorial
cue as signifying depth.