The Deployment of Visual Attention
Final rept. 1 Jun 2006-30 Nov 2008
BRIGHAM AND WOMEN'S HOSPITAL BOSTON MA
Pagination or Media Count:
AIM 1 Transcending the serialparallel dichotomy in visual search Guided Search, our model of human visual search behavior, has proposed that preattentive visual processes guide the deployment of attention from item to item in a serial, item-by-item fashion. Other have proposed parallel models of search. Our new model, Guided Search 4.0 and our data attempt to reconcile these views. It is a hybrid model in which a serial bottleneck governs selection of some visual objects for further processing. Visual processing before and after the bottleneck can be characterized as parallel. AIM 2 Understanding the role of memory in visual search We have found visual search for targets proceeds without memory for rejected non-targets. This claim runs counter to the common sense observation that we direct real-world search strategically. I have looked there. Now I will look here. New work replicates our findings and shows that the common-sense, memory processes are quite slow and, thus, often not useful in laboratory search tasks. AIM 3 The relationship of different modes of attentional control. Finally, we report on a series of experiments that show how visual search can occur at the same time as other visual tasks.
- Anatomy and Physiology