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(A) Cueing-task procedure. (B) The average of P1 and P2 across observers from the cueing task. The probes in the cueing task are presented 388 ms after fixation. (C–D) P1 and P2 averaged across observers for the average of the probe presentation at 351, 386, and 421 ms after search-display onset, in target-absent square-array trials for (C) the conjunction condition and (D) the feature condition.
