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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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00263_Field_263.txt
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1996-12-31
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At first these figures are not
identifiable, but with
continued inspection or a hint,
the fragments suddenly are
perceptually reorganized and
recognized. In viewing these
figures, recognition requires
grouping the same elements
differently. In each case, an
impression of depth emerges
where before only two
dimensions were seen.
Arriving at these impressions
of form and depth is not merely
a matter of going from
perception to identification in
a bottom-up direction because
along with such identification
comes a perceptual change.
Whereas normally recognition
of an object does not alter our
perception of its form or depth,
these patterns look different in
several ways when they are
recognized. Grouping is
different; depth generally
emerges that was not present
before; and, perhaps most
importantly, the figures now
look like the objects they
represent--they have the
shapes and depth relations of
those objects. If these
fragmented-figure effects were
not perceptual in character, it
would be mysterious indeed
why viewing them would not
lead immediately to
recognition. Thus we can
assume that some mental
process that precedes or
accompanies the moment of
recognition entails a
perceptual reorganization.