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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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ILLUSION
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SROCK_TX.CXT
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00235_Text_ref22t.txt
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1996-12-31
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Among the other principles of
grouping that Wertheimer
singled out were common fate
and closure. Common fate
refers to the tendency to group
those units that move together
in the same direction and at
the same speed. Where grouping
would not otherwise occur in
stationary displays, as in a
well-camouflaged animal
standing still, it will occur as
soon as the display moves.
When the animal moves, its
various visible parts move
together, and it is suddenly
perceived. Similarly, clouds
that do not appear to be
separate when stationary are
perceived as separate the
moment they are seen to move
relative to one another.
Closure is the tendency,
other things being equal, to
group into unified structures
those components that together
constitute a closed entity
rather than an open one.
However, closure is better
known not as a principle of
grouping but as a tendency,
noted by the Gestaltists, to
complete otherwise incomplete
units. One might regard the
perception of the unit that
appears behind another in an
interposition pattern as a
manifestation of closure.