Figure 1.

Task and conditions, Experiment 1. While subjects maintained fixation on the white fixation dot, a memory cue appeared briefly at another location. Subjects were instructed to hold this cued location in memory throughout the trial. The fixation dot then moved, and after completion of a saccade to the new fixation location, a probe stimulus (oriented bar) appeared after a variable delay in either the cue's spatiotopic (top), retinotopic (middle), or control (bottom) location. Subjects made a speeded button press response to indicate probe orientation. A memory test stimulus then appeared, and subjects indicated whether or not it occupied the same spatiotopic location as the memory cue. The light gray gridlines remained on the screen at all times to provide additional spatiotopic cues. The gray arrow depicting the saccade did not actually appear on the screen. Stimulus configuration illustrated here represents only one of several possible, counterbalanced cue-saccade configurations.