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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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00245_Text_re40t.txt
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1997-02-04
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53 lines
Ambiguous perspective figure:
the pattern can be seen either
as a hallway (or box) or as a
truncated pyramid.
In our experiments,
therefore, we say nothing about
the potential re-versibility of
the figure. We present either
RubinΓÇÖs well-known figure of
the vase and faces or the figure
shown here. Then we ascertain
how the figure is perceived,
either by occasional samplings
or by a careful interview after
the period of presentation. By
conducting experiments in this
way, we have found that
children under the age of 4 or 5
never reverse spontaneously
and only rarely and with
difficulty do so when they are
shown the alternative
possibility. High-school
students often do not reverse at
all, and most continue to see
whatever they perceive at the
outset for up to a minute or so.
The remainder may reverse
once or, at most, a few times in
the periodΓÇöΓÇôa far cry from
reversal every 5 or 10 seconds,
the typical outcome using the
traditional method. In fact,
these same subjects will
reverse frequently when later
given the traditional
instructions.
These findings suggest that
the satiation theory is
incorrect or at best only one
factor governing reversals.
Satiation is presumably a
process that is automatic and
inexorable, given the stimulus
presentation. Whether the
subject knows that the figure
can be reversed and what the
specific alternatives are should
have no influence on the
process.