Editing Operant conditioning (section)

===Operant hoarding===
Operant hoarding refers to the observation that rats reinforced in a certain way may allow food pellets to accumulate in a food tray instead of retrieving those pellets. In this procedure, retrieval of the pellets always instituted a one-minute period of [[Extinction (psychology)|extinction]] during which no additional food pellets were available but those that had been accumulated earlier could be consumed. This finding appears to contradict the usual finding that rats behave impulsively in situations in which there is a choice between a smaller food object right away and a larger food object after some delay. See [[schedules of reinforcement]].<ref>{{cite journal|last1=Cole|first1=M.R.|year=1990|title=Operant hoarding: A new paradigm for the study of self-control|journal=Journal of the Experimental Analysis of Behavior|volume=53|issue=2|pages=247–262|doi=10.1901/jeab.1990.53-247|pmid=2324665|pmc=1323010}}</ref>