Figure 2.

fMRI conditions: Scans were structured in a blocked design in which half of the trials directed the subject to perform the task with the target on the trained side and half on the untrained side. The Attention Only condition (2A & 2B) measured top-down modulation to a region of interest where there was an attended stimulus (indicated by circle) versus an unattended region with a stimulus (indicated by square). The Stimulus + Attention condition (2C. & 2D) measured bottom-up modulation to a region of interest where there was an attended stimulus (indicated by circle) versus an unattended region with no stimulus (indicated by square).