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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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rock_fie.cxt
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00378_Field_378.txt
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1996-12-31
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885b
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31 lines
There are conflicting frames
of reference in both examples.
Relative to the observer, both
the spot in the laboratory
example and the hand of the
person waving are moving
obliquely. But relative to the
moving frame of reference--the
rectangle or the train--these
objects are moving up and
down. This latter relation
seems to dominate our
perception. However, there is a
second component to our
perception of the movements:
We see the spot and the hand as
partaking of the horizontal
motion of the objects that
encompass them (frame or
train), apparently because we
perceive the spot as belonging
to the frame and the hand as
belonging to the train. The two
components of perceived
motion, vertical and
horizontal, together fully
account for the changing
angular direction of the spot or
hand with respect to the
observer.