"Psychopathic Tendencies Linked to Finger Length, Study Finds"

Canadian researchers have found a potential link between finger length and psychiatric disorders, noting that individuals with a lower 2D:4D ratio (shorter index finger compared to ring finger) are more likely to exhibit Dark Triad traits and aggressive behavior associated with psychopathy, narcissism, and Machiavellianism. The study suggests that this finger length pattern could be influenced by prenatal exposure to higher testosterone and lower estrogen concentrations, but emphasizes that it is not an irrevocable fate.