Not being double blind doesn't make it scientifically worthless.
Not does it invalidate male/female roles being consistent across over 200 cultures.
If you accept that men build muscle different from women, and have different hormones, could you not also accept that the differences in gray/white matter proportions, size etc are not 'cultural'?
Not does it invalidate male/female roles being consistent across over 200 cultures.
If you accept that men build muscle different from women, and have different hormones, could you not also accept that the differences in gray/white matter proportions, size etc are not 'cultural'?