Parallel search for two examples of one feature type
Jeremy Wolfe, Karen Yu, Marian Stewart
Proceedings of the Psychonomic Society Meeting, 1989.
In visual search experiments, subjects distinguished betwen trials with one
and two targets. Targets were red or green items. Distractors were of
heterogeneous colors because with homogenious distractors this would be a
simple discrimination between trials with one or two unusual items and
would not test for the ability to search for two different colors at the
same time. Results show that subjects could guide attention toward red
items and green items simultaneously.