Photo: © 2009 AAP/JENNY EVANS

Six out of every 100 kids are afflicted with the brain related problem, making it the most widespread mental health condition amongst young people.

But determining if a child has ADHD has always been an extremely difficult task.

With symptoms including forgetfulness, fidgeting and a poor attention span, the line between naughty kids and sufferers of the disorder is a very blurry one.

But now Sydney University researchers have developed a computerised test that will make the task of diagnosing sufferers easier.

The test looks at attention, memory and heart rates.