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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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00081_Field_81.txt
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1996-12-31
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759b
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27 lines
This arrangement is typical of
that used for an experiment on
lightness constancy. The
observer must match a standard
gray square on one side with a
comparison square on the other
side in a very different
illumination. The match is
usually to the shade of gray of
the standard.
Most students of perception
believe that the relational
explanation of perceived
lightness, lightness constancy,
and contrast is essentially
correct. From the discussion so
far, it appears that the problem
of lightness constancy is much
better dealt with by a theory
based on stimulus relations
than by a taking-into-account
type of theory, although, as we
shall see, there is more to
lightness constancy than
stimulus ratios.