BRUSH, E S Traumatic avoidance learning: the effects of conditioned stimulus length in a free-responding situation. [electronic resource] - Journal of comparative and physiological psychology Dec 1957 - 541-6 p. digital Publication Type: Journal Article ISSN: 0021-9940 Standard No.: 10.1037/h0042498 doi Subjects--Topical Terms: Avoidance LearningConditioning, PsychologicalHumansLearning