A combination of the distortion viewing principle
with the space memory principle.The space
reacts immediately to the shift of attention but
also has long-term memory of the accumulated
actions.Through this layering of properties the
directness of access to all parts of the space
is obtained as well as the shaping of the space
through the actions of all users interacting with it.
The purpose of this is to be able to scale up the
number of elements and users without reducing
the visual clarity of the display since the other user
are experienced as mediating the changes in the
space.The changes in the space cause a cluster-
ing or dispersion of the elements in certain areas
creating various foci of attention.These clusters
can be viewed as areas of higher activity where
more information flows in order to get exposure
to attention.