HILL, W F Resistance to extinction as a joint function of reward magnitude and the spacing of extinction trials. [electronic resource] - Journal of experimental psychology Dec 1962 - 636-9 p. digital Publication Type: Journal Article ISSN: 0022-1015 Standard No.: 10.1037/h0043597 doi Subjects--Topical Terms: Extinction, PsychologicalHumansLearningMotivationReward