rubia et al. compared a clinical sample of 56 children with ADHD aged 7-15 years with both a psychiatric control group of 16 children and a group of 23 typically developing children on a range of tasks designed to assess impulsivity in the broadest sense (monitoring off responses and inhibition).the three groups were matched for age and IQ.
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%).