Mellgren, R L Reward magnitude in differential conditioning: effects of sequential variables in acquisition and extinction. [electronic resource] - Journal of comparative and physiological psychology Jun 1974 - 1141-8 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0021-9940 Standard No.: 10.1037/h0037640 doi Subjects--Topical Terms: AnimalsConditioning, PsychologicalExtinction, PsychologicalFood DeprivationMaleRatsRewardTime Factors