http://www.clickertraining.com/taxonomy/term/236/9 (NRM) Intended to be a signal to say, “No, that isn’t what I want—try again.” From the OC perspective, it’s intended to add a verbal cue to extinction. However, once something has been added to the situation, it’s impossible to know whether a change occurred through extinction or punishment. No reward markers usually represent an unnecessary level of complexity in a training program. en