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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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00410_Text_re15t.txt
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1996-12-31
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929b
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32 lines
Oddly enough, few
experimenters have paid much
attention to how the frame
appears in experiments on the
rod-and-frame effect. In one
experiment in which this
question was addressed, Walter
Gogel and his associate R. E.
Newton of the University of
California at Santa Barbara
found that the rectangular
frameΓÇÖs tilt was perceived
accurately. But, in this
experiment, a small frame was
used, subtending only 10
degrees in visual angle, so that
it probably could not have
served as an effective world
surrogate. The small illusory
impression of rod tilt obtained
in this experiment might then
be interpreted as an illusion
analogous to geometrical
illusions in which acute angles
are misperceived. To put it
another way, the angle formed
by the rod and an edge of the
frame would be overestimated
so that the rod, when vertical,
would appear to be slightly
tilted.