" 

 ::Yeah, that's what my original {{clarify}} was really about.  So, I've restored the {{clarify}} and added others where Q-IV and Q-I sensitivity is addressed.  I understood that Q-IV is the least sensitive and the generic definition of ""less sensitive"" (which is why I edited that from the article) but why Q-IV is the least sensitive (and Q-I is most sensitive) isn't explained in the article."