 Other theories have been proposed that also retain the Broadbentian idea that attentional selectivity is the result of capacity limitations, while retreating further than Lavie from the picture of attention that Broadbent introduced. These theories reject the terms of the debate between early and late selectionists because they reject the idea that the capacity limitations responsible for attention are clustered into a single bottleneck. In some cases this is because the selectivity of attention is taken to be the result of multiple bottlenecks in processing capacity (see, e.g., Johnston and McCann, 2006). In other cases it is because these theorists see capacity limitations as occurring throughout the processing stream, and not as clustered into bottlenecks at all (see Driver, 2001, for a suggestion along these lines, and Allport, Antonis &amp; Reynolds, 1972, for an earlier indication of it).