Scott Alexander analyzes 2D:4D ratio data from LW/SSC surveys, finding unexpected correlations with feminism and masculinity, despite failing to replicate basic gender differences in digit ratios. Longer summary

Scott Alexander discusses his analysis of the 2D:4D ratio (length of index finger divided by length of ring finger) and its correlations with psychological traits, using data from the Less Wrong and Slate Star Codex surveys. The study aimed to explore connections between digit ratio, gender, and various traits like feminism and autism. Despite failing to replicate the basic finding of men having lower digit ratios than women, the study found unexpected correlations between digit ratio and opinion of feminism in men, and between digit ratio and masculinity in women. Scott expresses confusion about these results, noting inconsistencies with previous research and unexpected patterns in the data. He concludes that while the study was messy, it managed to find clear signals in unexpected places, though he remains uncertain about the implications of these findings. Shorter summary