First, the rat experiment that you want has actually been done. In rats, testosterone improves spatial reasoning. See https://www.ncbi.nlm.nih.gov/pmc/article

First, the rat experiment that you want has actually been done. In rats, testosterone improves spatial reasoning. See https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3081396/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3081396/ for verification. Secondly an inability at spatial reasoning definitely is going to make engineering courses much, much harder. So your claim that there is no effect on getting to entry level engineer is overstating your case by a lot. That said, there is a documented difference between men and women that affects a first hire. And that difference is that the whole "fake it until you make it" attitude is more commonly found among men than women. So there is actually a significant difference between nervous women and nervous men talking to recruiters about their first job. Not sure how important it is, but it should not be discounted. Do you have followup questions?