Purposeful attempts to specifically induce spacial disorientation was never part of the exercise although spinning on limited panel `under the hood` was part of the military training syllabus and this certainly could cause disorientation
My next door neighbour now nearly 80, is a former RAF Canberra pilot. He learned to fly on Harvards. He told me instrument flying was done from the back seat with a cover over the complete cockpit so the student could not have a sneak look outside. I asked him did he have to close his eyes and put chin on chest?
He looked astonished and said what the hell for - I couldn't see outside. Spacial disorientation practice? He'd never heard of it...