I have no degree, and know nothing of the article that fostered this thread.
Part of my employment contract when I first started instructing at the Space Base in Cessnock in '86 was to read and be examined on a book about flight instruction.
The book's name has long been forgotten but it was written by a couple of academics from Newcastle University, who were associated with Jim Spark. The basic premise of the book was that to be an effective instructor, one had to be able to communicate, in a common language with the student.
Given that the book had a significant emphasis on communication, I was some what nonplussed when in the final chapter I had to get a dictionary out, to determine what a word starting in X meant.
In the end, I figured that the authors had completely missed their own message, when they used a high-faluting word starting with X, instead of HAND.