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.bekindtopets.com/top-super-Etatron-E128-Medicator-Pump-1-128-mega-choice/