The Biological Pyschiatry study done by researchers from the Cambridge University showed that chemical imbalance in brain could be the real reason behind antisocial behavior in boys. In this research, researchers also found differences in the brain chemistry in youths with behavior problems when they were under stress. This study was led by Dr Graeme Fairchild and Professor Ian Goodyear.

The researchers analyzed the data collected from165 boys aged between 14 and 18. These boys were recruited from schools, pupil referral units and the Youth Offending Service. Out of 165 boys, 70 boys had history of conduct problems while 95 had no such history.

The study subjects were introduced to stressful conditions. These boys were asked to play a video game in which the pre-recorded opponent always failed to cooperate and sent antagonistic messages. Researchers observed these boys while playing the game under time pressure with the video opponent.  

Generally during such circumstances the body increases levels of the stress hormone cortisol. It is believed that increase in cortisol levels make people behave more cautiously, and help them to regulate their emotions, particularly their temper and violent impulses. Researchers found out that the cortisol levels went down in the boys with severe anti-social behavior problems. 

Researchers said: "If we can figure out precisely what underlies the inability to show a normal stress response, we may be able to design new treatments for severe behavior problems. We may also be able to create targeted interventions for those at higher risk. A possible treatment for this disorder offers the chance to improve the lives of both the adolescents who are afflicted and the communities in which they live."