home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Illusion - Is Seeing Really Believing?
/
Illusion - Is Seeing Really Believing (1998)(Marshall Media)[Mac-PC].iso
/
pc
/
illusion
/
rock_txt.cxt
/
00374_Text_rem16t.txt
< prev
next >
Wrap
Text File
|
1997-02-04
|
2KB
|
59 lines
If this interpretation of the
optomotor response in fish is
correct, induced self-motion
may be far more prevalent in
the life of animals than we
realize. It is perhaps confusing
to think of situations in which
the observer is in motion as
exemplifying induced motionΓÇöΓÇô
as in the case of the
transported fishΓÇöΓÇôbut the fact is
that the perceptual situation is
identical here to the one
usually defined as yielding
induced self-motion, where the
surroundings are moving and
the observer is stationary. If
this is true, then there are
many other cases in the daily
life of human observers in
which induced self-motion is
occurring. Whenever we are
transported in a vehicle and
moving at uniform speed, it is
only by induced motion that we
see ourselves in our vehicle as
moving. With our eyes closed,
the only cue to motion would be
vibrations, and that is
insufficient. Even with our
eyes open and, let us say, only a
single light visible, we would
tend to misperceive it as
moving if we did not know that
we were in a moving vehicle.
But with the full scene
surrounding the vehicle
visible, we do perceive
ourselves to be in motion.
Therefore, the determinant
here is the same as if our
vehicle were stationary and the
scene contrived to move past
us. The underlying factor of
great theoretical importance in
this entire discussion is the
tendency for the surround to be
"assumed" to be stationary, to
be interpreted as the frame of
reference, and thus to yield the
various consequences for
perceived motion that we have
considered. In the next
section, we will see certain
other consequences of relative
motion and the frame of
reference.