Knowledge and Resource Hub
09 October 2018

Aggression in childhood: Rooted in genetics, influenced by the environment

This research used 555 sets of twins to compare incidences of proactive and reactive aggressive behaviour. The study demonstrated that, at age six, both types of aggression have most of the same genetic factors, but the behaviour diminishes in most children as they age. Increases or decreases in aggression between the ages of six and 12 appear to be influenced by various environmental factors rather than genetics. The results also revealed the importance of developing different prevention methods for reactive and proactive aggression, specifically by offering support to families and providing interventions in schools.