Figure 1.

Schematic illustration of an experimental trial sequence in Experiment 1. In each trial, a sample array of a colored cue circle was presented for 500 ms followed by a brief retention period (300 ms). After the retention period, a visual search array (2000 ms) containing the original cue circle and a circle of a different color was presented with the two items appearing 4.41° from the original cue circle, one on each side of fixation.