Sorry about not attaching my name to my last post. I should reveal that I have a PhD in experimental psychology and have taught the principles of learning to well over a 1000 students. Using the conventional abbreviation CR in Pavlovian conditioning and then as an abbreviation for a "conditioned reinforcer" would simply lead to mass confusion in students. I sampled the index in a few textbooks. Several listed CR under the topic of conditioned response, but no index listed CR as conditioned reinforcer. I was attempting to help people understand the topic, not to offend a falconer.

-- Scott