Abstract

This study aims to test whether two morphometric characteristics, the second to fourth finger length ratio (2D:4D index) and the facial width-to-height ratio (FWH index), which reflects the degree of facial masculinization, are related to aggression in adolescents of both sexes. Previous studies have proposed that the 2D:4D index (a trait related to prenatal testosterone) and the FWH (related to testosterone during puberty) are related to aggressiveness in adult males (although there is evidence to the contrary). In the present study we investigate the relationship of both traits with different measures of aggression in a mixed population of 296 adolescents (14-19 years old). We did not find relationships between 2D:4D and FWH with aggressiveness. Furthermore, our results suggest that the FWH index must be used only after controlling for body mass index.