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.
• Find out why scientists are interested in the length of your fingers.
• See how your results relate to theories about brain sex.