Abstract (eng)
Previous studies have shown that the relative length of the second to the fourth finger (2D:4D) is a proxy for the ratio of the prenatal testosterone (T) to estrogen (E) exposure and that prenatal sex steroids such as T and E determine masculine and feminine facial characteristics in humans. These facial characteristics are recognizable hormone mark- ers and influence different social perceptions. In this thesis the relationship between 2D:4D and some social perception variables in women’s faces was investigated. From 52 female students aged 19 to 31 years, 2D:4D was obtained by measuring the index and ring finger digitally from hand scans. In a previous study 103 evaluators, aged 18 to 32 years, rated photos of the faces of the 52 female subjects for femininity, health and attractiveness. The results showed that there are moderate positive correlations between 2D:4D and perceived femininity (r = 0,402; p = 0,002), health (r = 0,449; p = 0,001), and attractiveness (r = 0,356; p = 0,006). This means that women with a lower testos- terone exposure (higher 2D:4D) are perceived as more attractive, healthier and more feminine than women with a higher testosterone exposure (lower 2D:4D). These find- ings suggest that there is an organizing effect of prenatal testosterone in women, which determinates typical female facial features through lower testosterone exposure and thus reflects femininity, health and attractiveness. Furthermore, this influences the percep- tion of others.