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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Cogn Psychol. 2014 Mar 17;72:1–26. doi: 10.1016/j.cogpsych.2014.02.001

Figure 1.

Figure 1

Stimulus setup used in the present experiments. Shown is an endogenous-task trial where participants use the center cue to locate the outer circle with the response-relevant information (i.e., L vs. R), while ignoring the sudden-onset stimulus in the periphery (if presented). For exogenous-task trials, subjects would have to locate the sudden-onset stimulus while ignoring the central-cue information (if presented). Stimuli are not drawn to scale; gray was presented as white on black background, black was presented as red.