A researcher has designed a study in which rats receive a pellet of food when they press a lever, but only after a set amount of time has passed since the last time they received a pellet of food. Which kind of reinforcement schedule is this researcher using

Aly! italy! entirely and universally fascist! the italy of the blackshirt revolution, rise to your feet; let the cry of your determination rise to the skies and reach our soldiers in east africa. let it be a comfort to those who are about to fight. let it be an encouragement to our friends and a warning to our enemies. it is the cry of italy which goes beyond the mountains and the seas out into the great world. it is the cry of justice and of victory. this excerpt could best be used to support a document-based essay on mussolini’s fall from power. mussolini’s role as a charismatic dictator. italy’s high unemployment rates. italy’s alliance with nazi germany.