Dr Campbell and PhD student Krestina Amon have discovered that an off-the-shelf computer game - in which the player wears bio-feedback sensors, and must use breathing and meditation techniques to advance through the levels - can markedly improve the stress and concentration levels of ADHD sufferers.

Together they plan to develop new therapeutic computer games that could increase self-esteem, reduce anxiety and help children manage ADHD.

"Nexon believes there is a whole new market for therapeutic games that deliver real outcomes, and we'll provide the science," Dr Campbell said.

The child psychologist hopes this treatment will offer parents an alternative to controversial stimulant medications used to treat ADHD.

"We're not saying this is the holy grail of ADHD treatment, but our research has shown that therapeutic games can improve the concentration of those with mild or moderate ADHD."