Whoa whoa whoa, you're the one who's clearly just twisting what I say, yet somehow you're saying I'm the one with lack of analytical thinking...
I'm not saying gender differences are/are not sexist, or racist, however, what I'm saying is that before you can attribute a difference between groups to being 'nature', you have to eliminate potential 'nurture' factors too. You have to do this for any type of gene theory... I don't see why this is different in your head. Hence, psychology research trying to attribute other factors to the difference between men/women and races.
Yeah, my evolution argument seemed ridiculous, that's because I was taking the piss out of your 'abstract reasoning evolution' argument, because as I said, considering women clearly do have abstract reasoning, hence the women who do maths a-level (women definitely make up at least 40%, if not 50% of people taking maths a-level) don't do any worse than men. Yet they're less encouraged to go into it as a degree. The women who DO choose the degree itself are just as good, and there ARE more and more women going into it as a degree. As such, how is it so hard to believe that there may be just a gender-biased discourse in society? If you think there is a gender discourse that makes men more likely to be told to 'man up', then clearly there could be one that makes women more likely to blend into the background and purely look pretty. This isn't even me saying men are suppressing women, this is just me saying that society as a whole, so men and women, see this gender gap and so try to fit into their roles in it.
If you imagine a girl who does physics, society tends to think more of a slightly nerdy, not necessarily attractive looking girl, compared to one who does art. That, at least, is what we see in the TV shows. The difference is decreasing, however if you think of the 'nerds' in 90s american tv shows, you'll think of boys in checked shirts with thick rimmed/broken glasses but there are also occassionally girls, also unattracive. You won't think about attractive girls. But the attraction thing matters less to guys in some respects because they don't feel like they have to compete with other women to be more attractive. This isn't a nature thing, according to psychological theory, it's simply the only way women feel they can get ahead in society. A lot of the time, in the press, the few female polticians we have are scrutinised for the way they look rather than the way they talk. You don't see articles talking about how Barack Obama or any other male politician went out of the house daring to look dowdy and stressed because he wasn't wearing any makeup, but you do see it about women.
I teach an 11 year old girl chemistry and physics. Her ability is fine, completely fine, if not outstanding. She does everything I plan for a 1 hour lesson in 20 minutes or less. She actually likes it. However, she gets sent out of class all the time for not wearing the correct uniform, or having too much makeup, so she gets behind. Being so distracted with the way you look and feeling like you have to be to fit in with society, to the extent that it detracts from your education, is clearly an issue.
I was bullied for being a smart girl at school, and people chose to also take this out on my appearance. I didn't wear a lot of makeup or straighten my hair, I basically looked like a 12 year old little girl looks naturally. But that made people bully me, which was distracting in lessons. I remember the girls visibly studying to get A*s in science GCSE were often teased; guys weren't immune to it either, but they also didn't have to consider how they looked.
This is what I meant by the 'self-objectification'. However appearance isn't the only thing that the gender-bias encompasses. It's simply just a way of viewing life. There are gender-biases that it is far more likely come from environment rather than genes. I don't see why, if women ARE entirely capable of attaining the same standard in STEM subjects as men previous to degree level, they wouldn't go into the degree.
Also, there's something to be said for the boys being the loud and dominant ones and class clowns in lessons, dominating all the attention from the teacher including the help, and girls sitting in the background. This was certainly true at my school. This kind of thing clearly affects a subject that requires technique and taught methods more than it affects a subject that is somewhat intuitive.
See this:
http://www.leics.gov.uk/girls_and_maths.docIt's all over the education policy and rhetoric.
There's a REASON for women not seeing physics as a female subject, and I'm saying that's purely the discourse in society.
I wasn't saying all women who go into economics 'want to help other women', that's insane. I'm saying economics provides women with opportunities to get power and CEO positions, compared to other subjects, and medicine is a 'caring' degree. Physics, engineering etc don't provide these rare opportunities for women to get ahead. That may account for some of the difference.