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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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00349_Field_349.txt
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1996-12-31
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57 lines
The most one can safely
conclude from the
developmental and
crosscultural studies currently
available is that the depth-
processing theory is not
unequivocally supported by
them. With the possible
exception of the Ponzo
illusion, the developmental
data and the crosscultural data
are not consistent with one
another in supporting this
theory. The tendency of
children by and large to
perceive illusions of greater
magnitude than adults do can
perhaps best be explained by
their inability to isolate the
test lines from the inducing
ones in which they are
embedded. An illusory effect
based on difficulty of this kind
is consistent with the
incorrect-comparison theory.
A possible explanation of
cross-cultural differences that
is quite unlike one based on
differing visual environments
is that of innate differences in
the structure of components of
the nervous system.
Differences in such factors as
density of pigmentation of the
lens and the central region of
the retina, the macula, are
even more highly correlated
with differences in
susceptibility to illusions than
are differences in the physical
environment. These
physiological factors, if proven
to be relevant, are rather
different from the kinds of
explanations of the illusions
explored in this chapter.
Perhaps there are other as yet
undiscovered inherited
differences in the structure
and function of the perceptual
system that might explain the
differences in susceptibility to
the various illusions among
peoples of various societies in
the world.