![]() On a scale from one (strongly disagree) to five (strongly agree), the average male opinion of feminism was 3.4 the average female opinion was 4.1 the difference was significant at a p < 0.001 level. The sex difference in femininity was significant (p = 0.01) but masculinity wasn’t (p = 0.19) though it trended in the expected direction. Average Bem Masculinity was 42.3 for men and 40.5 for women. left hands.Īverage Bem Femininity was 42.2 for men and 45.8 for women. The difference was not significant, didn’t trend toward significance and actually was the opposite direction on right vs. The average male digit ratio was 0.972 the average female digit ratio was 0.975. Although participants gave digit ratios from both their right and left hands, the differences were not significant and I averaged them together to create a less noisy measure. Of these, 454 were biologically male and 75 biologically female. Both surveys also included demographics questions, questions about sex and gender identification, and questions about political beliefs.Ĥ07 people on the Less Wrong Survey and 122 people on the Slate Star Codex Survey gave plausible digit ratio measurements (I rejected measurements outside the range of 0.8 – 1.3 as implausible), for a total of 529 people. I wanted to look at this more, so I included questions about digit ratio in the 2014 Less Wrong Survey and in the 2014 Slate Star Codex Survey. Maybe the weirdest paper along these lines is Madison et al’s 2014 paper showing that feminist activist women have more masculinized 2D:4D ratios than other women, which suggests something about how “neurological gender” influences the way people respond to social gender roles. But there have also been other studies that challenge some of these results, and the whole field is maddeningly inconsistent. For example, aggressiveness, penis length in men, and lesbianism in women have all been correlated with more masculine 2D:4D ratio. ![]() Past research suggests that men generally have lower 2D:4D ratios than women, and that within each sex people with various stereotypically-male characteristics have lower 2D:4D ratios than people with various stereotypically female characteristics. It seems to correlate with some kind of prenatal hormone exposure, which makes it a unique way to explore the effects of purely-biological factors on various traits without having to do hormone assays or go through an ethics board. So, on items such as ”I have no problem talking in front of a group” or “ People turn to me for decisions” there was no difference between the more masculine versus feminine digit ratios.2D:4D ratio is the length of someone’s index finger divided by the length of their ring finger on the same hand. Digit ratios however were unrelated to any measure of social dominance or leadership. They then completed an aggressive dominance scale with items such as “ When people are annoying me, I put them in their place” and “I quickly feel aggressive with people.” The more masculine 2D:4D’s scored higher on this scale. ![]() ![]() In a recent study in the journal Aggressive Behavior, Dutch and Spanish scientists find that among men a lower 2D:4D ratio is related to a more aggressive, dominating personality.2 They first scanned the left and right hands of the male participants and then averaged the 2D:4D’s of both hands (hands are not identical). Digit ratios have also been linked to a range of other traits such as voice pitch, spatial ability, physical prowess, and status and dominance but the correlations are not always very strong and these effects need replication.
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