The human body is increasingly recognized as a biometric source of information for a wide spectrum of issues, including security, psychopathology, personality and health. Earlier we reported that job interviews might be replaced by brain scans within five years and denoted this news as a modern technological incarnation of occult palm reading. Now it turns out that palm reading itself has found a new incarnation – it’s in the ratio of your fingers.
John T. Manning, emeritus professor in psychology of the University of Central Lancashire and the University of Liverpool, has developed a new theory about how finger length relates to human biology and behavior. In the BBC series ‘Secret of The Sexes’, Manning successfully uses finger length ratio as a predictor for athletic ability.
A significant part of theory is focused on the so-called: ’digit ratio’, which concerns the full length ratio of only two fingers: index finger (2D) vs. ring finger (4D). In women the length of both fingers is usually about equal (2D:4D digit ratio = 1.00), while in men the ring finger is usually slightly longer (digit ratio = 0.98): a tiny sex difference.