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. Author manuscript; available in PMC: 2017 Aug 1.
Published in final edited form as: Neuropsychologia. 2016 Jul 1;89:335–343. doi: 10.1016/j.neuropsychologia.2016.06.038

Figure 1. SAT/dSAT design.

Figure 1

A) On each trial of the SAT condition, participants were asked to fixate on a small, centrally presented fixation stimulus (dark gray outline of a square on a light gray background). After a variable amount of time, a signal event (square filled in with dark gray for 17, 33 or 50 ms, with equal probability) or nonsignal event (square remained unfilled) was presented. Signal and nonsignal events were equally presented in a pseudorandom order. After a short delay, participants heard an auditory tone cueing them to buttonpress to indicate whether a signal was (one index finger) or was not (the other index finger) presented on that trial. Participants received auditory-tone feedback based on their accuracy. B) In the dSAT condition, participants performed the same task, now in the presence of ongoing distraction. The distractor stimulus consisted of the background screen alternating between a light gray background (66 ms) and a black-and-white checkerboard background (66 ms). The area immediately surrounding the fixation stimulus remained a constant light gray in this condition.