the test battery consisted of the stop signal task, a sample Go/No-Go task and a reversal task.
in the Go/No-Go task, a motor response had to be executed or inhibited depending on whether an image of an aeroplane appeared on the screen (which it did on 70% of trials); the response had to be inhibited if a bomb was presented (30% trial).
in the SST, a plane appeared for 1000ms followed 30% of the time by a bomb, either after 150ms (10%) or 250ms (20%).