home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Illusion - Is Seeing Really Believing?
/
Illusion - Is Seeing Really Believing (1998)(Marshall Media)[Mac-PC].iso
/
mac
/
ILLUSION
/
SROCK_TX.CXT
/
00071_Text_res28at.txt
< prev
next >
Wrap
Text File
|
1996-12-31
|
1KB
|
37 lines
If the apparent-distance
theory is correct, the moon
illusion should disappear when
sight of the terrain is entirely
eliminated. This is precisely
what happened when we
occluded sight of the terrain
with cardboards or when we
asked observers to view the
moon in the dark in the Hayden
Planetarium. In a further
experiment, mirrors were used
to create the impression of a
terrain for the elevated
"moon," so that, in looking
upward, the observer saw the
ground rising in a vertical
direction. Similarly, mirrors
were used to eliminate the
sight of the terrain ordinarily
visible below the horizon
moon, so that, in looking
straight ahead, the observer
saw only sky. Under these
conditions, the illusion was
reversed: The elevated moon
appeared larger. Although some
problems of interpretation
remain, it is plausible to
believe that the moon illusion,
like the afterimage illusion,
can be explained on the basis of
the same principles that
explain veridical size
perception and constancy.