In addition to Crick and Treisman one should look at work by Tsotsos
[reference: Tsotsos, J.K., ``Analyzing Vision at the Complexity Level'',
Behavioral and Brain Sciences 13-3, p423 - 445, 1990.]
In this and subsequent work a detailed computational model of visual attention
is described. The theory integrates previous psychophysical findings and
predicts new ones. Very interesting stuff.
