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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_txt.cxt
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00355_Text_rem02t.txt
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1997-02-04
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Instead of regarding these
motion-detector mechanisms
as the immediate cause of
motion perception, at least in
animals high on the
phylogenetic scale, it may be
more appropriate to think of
them as a source of information
about events on the retina. In
interpreting what is happening
in the world, the perceptual
system must take into account
other information from other
sources as well. For example, if
these detectors signal "motion"
when only the eyes are in
motion, the perceptual system
must discount that signal as a
sign of object motion. The
perceptual system "assumes" it
was caused by the observerΓÇÖs
own eye movements. However,
if the signal occurs when the
eyes are stationary, then it is
interpreted as a sign of object
motion.
If the detectors do not signal
motion, as when we track a
moving object and the retinal
image remains stationary, the
perceptual system can still
infer that the object is moving.
For this inference to be made,
however, the perceptual system
must somehow know that the
eyes are in motion.