I referenced this over at MAP in a reply to someone, and that someone gave me a face palm emoji :hihi:
Obviously there is room for standardization... after all, we wouldn't be were we are as a civilization without some common understandings/standards. But when it comes to behavior, and especially trying to measure mental capacity, we definitely need to account for cultural differences.
Frankly, that should be very obvious... a graduate researcher from a major university should've known about this, and not be surprised by it.