We previously reported that. in male. Long Evans rats. instrumental lever pressing that had been reinforced during limited training under a variable interval (VI) schedule by oral self-administration of a 10% sucrose/10% ethanol (10S10E) solution was insensitive to devaluation of 10S10E. https://www.markbroyard.com/great-pick-ego-sebitar-solution-500ml-supply-limited-choice/