Progressive ratio as a measure of reward strength.
Four rats were trained to press a lever on a ratio schedule of reinforcement in which the number of lever presses required on each consecutive run increased by a fixed increment. Both concentration and volume of the reward were varied. Relationships were obtained between reward and deprivation variables and the size of the final completed ratio run.
D000818:Animals; D007858:Learning; D009042:Motivation; D051381:Rats; D012054:Reinforcement, Psychology; D012201:Reward
LEARNING; MOTIVATION