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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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ILLUSION
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SROCK_TX.CXT
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00362_Text_rem13t.txt
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1996-12-31
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46 lines
The optokinetic response in
humans causes your eyes to
follow these moving lines in
the direction in which they are
moving, in this case, left to
right. A similar reflex was
shown in an experiment in
which a fly was placed inside a
rotating drum of vertical
stripes. Lacking the ability to
turn its eyes, the fly turned its
entire body, displaying the
optomotor response.
These findings tell us that
the specific relations between
a change of an objectΓÇÖs
direction and a change in the
observerΓÇÖs position that yield
an impression of motion or
position constancy can be
learned or relearned. They do
not necessarily imply that the
relations had to be learned in
the first place, however. For
some animals tested, position
constancy is innately
determined. In one
experiment, the head of a fly
was surgically rotated 180
degrees and kept in that
position. This had the effect of
reversing the direction of the
motion of the image of the
stationary scene during the
flyΓÇÖs motion, much as did the
lenses in StrattonΓÇÖs
experiment. What did the fly
perceive when it moved? A
simple but ingenious
experiment, conducted by Horst
Mittelstaedt of the Max Planck
Institute, that made use of a
known reflexlike effect
supplied an answer.