Editing Operant conditioning (section)

===Gambling – variable ratio scheduling===
{{Main|Gambling}}
As stated earlier in this article, a variable ratio schedule yields reinforcement after the emission of an unpredictable number of responses.  This schedule typically generates rapid, persistent responding. Slot machines pay off on a variable ratio schedule, and they produce just this sort of persistent lever-pulling behavior in gamblers. The variable ratio payoff from slot machines and other forms of gambling has often been cited as a factor underlying gambling addiction.<ref>{{cite journal|last1=Bleda|first1=Miguel Ángel Pérez|last2=Nieto|first2=José Héctor Lozano|date=2012|title=Impulsivity, Intelligence, and Discriminating Reinforcement Contingencies in a Fixed-Ratio 3 Schedule|journal=The Spanish Journal of Psychology|volume=3|issue=15|pages=922–929|doi=10.5209/rev_SJOP.2012.v15.n3.39384|pmid=23156902|s2cid=144193503|id={{ProQuest|1439791203}}}}</ref>