| | | | Sharing The Spotlight: Can You Search While Stream-Switching? Todd S. Horowitz, Jeremy M. Wolfe, Jennifer S. DiMase, & Randall S Birnkrant Two modes of attentional deployment can be distinguished on the basis
speed: slow (e.g. endogenous cueing) and fast (e.g. visual search) (Wolfe,
Horowitz, & Alvarez, Nature, 2000). Is it possible to make fast deployments
in the "dead time" between initiation and completion of slow deployments?
Observers looked for a cue (a "2") in a 9.3Hz stream of digits
presented to the right of fixation, then reported the first letter in a
second stream to the left. The time of the reported letter indicated the
time of the attentional shift. A 4-item search array centered on fixation
was presented for 107 ms at various SOAs; subjects detected a T among Ls.
Search performance during the cue to shift interval was superior to performance
when the shift of attention occurred. These data suggest that rapid deployments
of attention are possible between the planning and execution of a slow deployment
of attention. | |