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. Author manuscript; available in PMC: 2006 Aug 29.
Published in final edited form as: Vision Res. 2005 Jul 11;46(8-9):1210–1220. doi: 10.1016/j.visres.2005.05.008

Fig. 2.

Fig. 2

Sequence of events in a given trial. Observers performed a 2AFC orientation discrimination task on a tilted target Gabor patch, which appeared at one of eight iso-eccentric locations. The target was preceded by either a sustained cue (instructing observers to deploy their attention to the upcoming target location), a transient cue (reflexively capturing attention to the upcoming target location), or a neutral cue (baseline). The timings (precue and ISI) for sustained and transient conditions differed (along with their respective neutral conditions), to maximize the effectiveness of the cues. We used the method of constant stimuli to obtain psychometric functions, varying the contrast of the Gabor stimuli from trial-to-trial.