Martijn van Mensvoort -  Hand Research

October 28, 2007

Sex I.D.: Find out how your mind works!
Secrets of the Sexes: Finger Length, thumb dominance & Sex I.D.

A new BBC One series delves into our minds

What is Sex I.D.? Are men and women's brains wired differently? You might know what sex you are on the outside - but what sex are you on the inside?

Some researchers say that men can have 'women's brains' and that women can think more like men. Find out more about 'brain sex' differences by taking the Sex ID test, a series of visual challenges and questions used by psychologists in the BBC One television series Secrets of the Sexes:

  • Get a brain sex profile and find out if you think like a man or a woman.
  • See if you can gaze into someone's eyes and know what they're thinking.
  • See how your results relate to theories about brain sex.
  • Find out why scientists are interested in the length of your fingers + 'thumb dominance'.


    NOTICE: After taking the test you can compare your Sex I.D. with the results below of the men and women who did the test online during the BBC's One Show.

    Additional info:

    The scientists behind Sex ID asked test takers a series of questions, some of which covered personal or sexual topics. The questions were included to help researchers learn more about brain sex differences. For example, they are interested to know how test takers' finger measurements relate to the number of brothers and sisters they have. There is a theory that the amount of testosterone we are exposed to in our mothers' wombs relates to the ratio of the length of our index fingers to the length of our ring fingers our digit ratios. Furthermore, it's thought that prenatal testosterone may increase or decrease systematically with each male child a woman has. Dr John Manning is particularly interested to learn if there is a link between testosterone and birth order. That's why we asked test takers to measure their fingers and answer questions about their families.


    Find a Palm Reader in the UK!

    Related sources:
    A review of the test by Michael Mosley
    More background info about the Sex I.D. test
    The BBC's Secrets of the Sexes




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