Emotional problems, conduct problems and hyperactivity were lower in the Hadza children (n=113). Prosocial behaviour and peer problems were higher in Hadza children. 3.6% of Hadza children met the criteria for a psychiatric disorder compared to 11.8% of English children.
The Hadza are a modern hunter-gatherer people living in northern Tanzania. They are considered one of the last hunter-gatherer tribes in Africa with approximately 1,300 tribe members