It then moves to toys: a chemistry set for John, and a doll for Jill.
For example, he says, more women are accepted into medical schools than men, while more men go into maths or physics.
Women are more into people “My view is that it reflects that more females choose to use their strong scientific ability to help and understand people, whilst more males choose to use their strong scientific ability to understand and create inanimate systems,” he says.
The theory is saying that, on average, males and females differ in what they are drawn to and what they find easy, but that both sexes have their strengths and their weaknesses.
Neither sex is superior overall.” So there may be some underlying scientific factors behind men and women’s choices. Even Professor Baron-Cohen points to “societal barriers” which are more likely to explain the gender gap in science professionals than anything else. The Big Short, the film adaptation of Michael Lewis' book of the same name about the causes of the financial crisis, opens in UK cinemas this weekend.
"No-one knows what these differences mean for people's ability to do different cognitive tasks," he says.