Yes, I do mean that Johnson O'connor.

Have you ever seen his English Vocabulary Builder? A giant work in psychometrics conducted by O'connor at Steven's Institute of Technology in Hoboken, NJ, USA. He tested people's vocabularies, then arranged the results under the headings "100% of those tested knew these words...99%....98%..." All the way to "1% of the people tested knew these words..." It's a pretty cool study. Horseshoe was a word that 100% of the peope knew.
Along with each word, he gives the etymology and says stuff like "People may have gotten this wrong because..."
Anyway, I thought the book would interest the AWAD ilk.

(Did I just coin AWAD as an adjective?)