When a "Q" on which someone is dependent does not occur, it will cause a withdrawal, a characteristic set of signs and symptoms. A lack of a "Q" can cause an increase in certain behaviors such as a return to training foundation skills, increased grumbling, pointing blame at other factors, increased video purchasing, overt optimism, higher internet surfing, putting for sale signs on ones dogs, saying they should quit (we know they won't), or locking oneself in their home saying they'll never "Q" again.
Addiction is generally associated with increased "No Q" tolerance. As one gets more and more addicted, the lack of "Q's" becoming more common place, a resistance to no Q's is increased. Excuses replace "Q's". True addiction can be identified by the person that doesn't "Q," but can point out where the run went well.
One "Q" will make the person giddy and over the top and generally can keep that person "high" for many runs. Enablers will allow a "Q" every once in a while to keep that person hooked. Many enablers are truly masters at timing when the "Q" will be most unexpected and keep that person hooked for a long time to come.