I like GR and recommend her book highly.
Here she is on the question of "trans" brains.
Audience Member 3: Hi, I love your talk first of all and, as a woman in science, really appreciated the nod to that. So as you were talking I just found myself feeling really curious about, you know, gender is not just a binary, it is a spectrum. And so I’m just curious if you can speak to the state of the literature about what we know for folks who identify as transgender and across the lifespan.
GR: I think it certainly has relevance. I do get asked about transgender issues a lot. It’s not an area I research in, so I’m quite cautious because I think it’s such a complex area. A whole range of things: I certainly think that we need to move away from the idea— and I didn’t talk at all really about the difference between sex and gender. In fact, one of the explanation slides kind of whizzed past at some point. The whole idea of the biological sex, that, you know, whatever it is determines your anatomy also determines your brain. That I would say is the kind of biological sex, and the whole issue of the roles that that means you can play is gender. It used to be that it was so determined, that one was inextricably linked to the other. You only had one word, and it was everything was known as sex. And then about the 1980s, they wanted to differentiate them, so you had sex or gender. And now I think you’ll find that the word gender has taken over and actually means everything including biological sex. And there was a big row in the UK in the summer because there was some biology exam where children were asked about different chromosomes, and asked how we know that chromosomes determine gender. And there was a big uproar about it. Apparently it was originally sex, but they thought that might confuse the children, so they put gender. Which, perhaps, says it all. Anyway, so the idea is that we need to get away from this binary. And in fact, even biologists are saying, “We used to think it was a nice clear XX or XY, but that really isn’t the case. We’re looking at a biological spectrum.” Looking at the brain characteristics, if you look at all the data, there’s no clear distinction, reliably, aspect which distinguishes males and females. Certainly there are sex differences associated to hormone receptors, etc, but the role that might play in behavior and in society is probably been overemphasized, definitely been overemphasized. And similarly the idea that you have a gender which is associated with your role in the world, the relationships you have, etc., now that we’re starting to unpack this link, gender could indeed be a spectrum. And I think that’s what we’re seeing now where people are saying, “Actually just because you’re born a boy or you’re born a girl doesn’t mean you necessarily have to be masculine or feminine.” This comes back to the language issue as well. So I think the transgender issue is part of that. I think one of the problems is the remnants of this idea, or the fixation on this idea that your biological sex is inextricably linked to your gender. So that if you feel some kind of disconnect that you don’t fit—you are assigned a male, you are assigned a female at birth, you actually don’t feel male or female—very often people assume that there is something wrong with the biology, and that if you change the biology, that will resolve the puzzle, as it were. And there is evidence that that is not a wholly successful solution. But I think what we can do is just, if you say, “Actually there is no connection. Yes, you’re born a male or a female, but then you can be anything you like in terms of who you feel you wish to associate with or the role you feel you should play in life.” I think that’s an issue there. But I would say that I get into trouble because one of the aspects of individuals, particularly who want to transition, and I don’t want to trivialize this, but there’s a sort of claim that you know, “I’ve got a female brain in a male body or a male brain in a female body.” And then, of course, I come along and say, “Well actually there’s no such thing as a female brain or a male brain.” And I have had individuals who want to transition to say, “Could you scan my brain to show that it’s actually a female brain,” if it’s a man, and I say, “I’ve got no template to say this is what it’s like.” Sorry, that was a long answer to the question. Great question. Thank you.
Taken from here: https://townhallseattle.org/event_transcript/gina-rippon-the-myth-of-the-gendered-brain/