Figure 1.

Diagram of the virtual Morris water maze task. Two runs of 40 trials were completed, half during threat of shock (T) in one pool environment and half during safety (S) in another pool environment. The platform was visible or above the water in the first run, and hidden or submerged in the same location in the second run. Participants completed a block of 4 trials (red and black hash marks) within a pool before alternating to the other, starting from each of four random locations at the pool’s edge. In the threat pool, shocks (lightning bolts) were delivered on 5 different trials per run.