HILL, W F Extinction in a runway as a function of acquisition level and reinforcement percentage. [electronic resource] - Journal of experimental psychology May 1963 - 495-500 p. digital Publication Type: Journal Article ISSN: 0022-1015 Standard No.: 10.1037/h0046941 doi Subjects--Topical Terms: Extinction, PsychologicalHumansLearningReinforcement, Psychology