I've only read one of them [1] in full, so it's hard to say with any depth my opinions of the others. Some of the findings listed in the abstracts have varying

I've only read one of them [1] in full, so it's hard to say with any depth my opinions of the others. Some of the findings listed in the abstracts have varying mentions of biological involvement. The larger point they were trying to make is that there are differences _now_, and given some of the research that's influenced as far back as at least middle school for the cultural part of it. Where the ratio is for nature/nurture they leave open for a future post (which they claim to be working on). 1) http://sci-hub.io/10.1111/j.1751-9004.2010.00320.x http://sci-hub.io/10.1111/j.1751-9004.2010.00320.x