Sex differences in 2D: 4D ratio, aggression and conflict resolution in African children and adolescents: a cross‐cultural study

This study was conducted on children and adolescents from the three tribal cultures from Northern Tanzania: the Hadza, the Datoga and the Iraqw. The comparative data on aggression and conflict management skills were measured at Endomaga Boarding School, Lake Eyasi, Mangola in Northern Tanzania, in 2005‐2006. The final sample included 219 children, ranging from 7 to 20 years of age. No sex differences were found in self‐ratings or frequency of occurrence of physical, verbal and indirect aggression in Iraqw children and adolescents, or in self‐ratings in Hadza. Hadza boys reported a higher occurrence of physical and indirect aggression during the previous week compared to girls. No differences between the sexes were found in constructive conflict resolution and third‐party interventions practiced by Iraqw and Datoga children and self‐ratings in Hadza. Hadza boys reported a higher frequency of constructive conflict resolution and third‐party interventions compared to girls. Significant sexual dimorphism on the 2D:4D ratio was found for our African sample. A significant negative correlation between the right hand 2D:4D ratio and ratings on physical aggression was found for the girls. The girls with the lowest finger index estimated themselves as more verbally aggressive, compared to girls with a medium 2D:4D ratio.