The task during the encoding runs was passive viewing and listening while attempting to learn the associations. Because the cue and the target were each 1 s and the target was presented immediately after the cue, the duration of a pair during encoding equaled 2 s. The ISI during the encoding runs was jittered at 2, 4, or 6 s to allow for rapid presentation. Runs 9 and 10 consisted of a slow event-related memory task in which participants were presented with cues alone and responded whether the cue was previously paired with an auditory or visual target.