FIG. 1.

This figure presents a diagrammatic representation of the auditory orienting task. The headphones were used to present the cue (a 2000-Hz pure tone), and the target (a 1000-Hz pure tone). The stimulus onset asynchrony (SOA) between cues and targets was 200, 400, or 700 msec. Cues correctly predicted the target location on half of the trials (50% validity ratio). Participants responded to the target location by pressing a button with their right index (left target) or middle (right target) finger.