Figure 5.

Auditory spatial and auditory temporal change-detection tasks (Experiment 4). (a) Schematic of a single trial within a blocked design. Each trial comprised a target stimulus (2,350 ms), followed by a 900 ms delay, and then a probe stimulus (2,350 ms). Subjects indicated “change” or “no change” along the attended dimension with a right hand button press. Within each stimulus presentation, complex spatialized tones were presented sequentially. In the spatial task, subjects attempted to detect a change in the location of any of the tones. In the temporal task, subjects tried to detect changes in the onset-timing pattern of the tones. (b) Average percent signal change (n = 9) relative to sensorimotor control within each frontal ROI (data combined across hemispheres) for the spatial (dark gray) and temporal (light gray) auditory tasks. Error bars reflect s.e.m. Note the stronger recruitment of visual-biased ROIs for the auditory spatial task compared to the auditory temporal task.