M. Hyle

Changing your mind: on the contributions of top-down and bottom-up guidance in visual search for feature singletons.

J. Wolfe, S. Butcher, C. Lee, 2003, Journal of experimental psychology. Human perception and performance.

How fast can you change your mind? The speed of top-down guidance in visual search

Naomi M. Kenner, J. Wolfe, T. Horowitz, 2004, Vision Research.