Example of an Attend-Left Cue–Plus–Target Trial

<div><p>A centrally presented left cue (letter L) instructed the participant to covertly attend to the lower left visual field box to detect an upcoming faint dot target that might be presented there. A target could appear either early or late (50% probability) following the cue and at the valid location only. An end-of-trial signal (the letters REP) presented at 2,700 ms post-cue signaled the participant to press a button to report if they had seen a target. Other trial types included attend-right cue–plus–target, attend-left cue–only (no target), attend-right cue–only (no target), interpret-cue (also no target), and NoStim trials (no cue nor target).</p> <p>SOA, stimulus onset asynchrony; ITI, interstimulus interval.</p>