Hug, J J Frustration theory and partial reinforcement effects: the acquisition-extinction paradox. [electronic resource] - Psychological review Jul 1969 - 419-21 p. digital Publication Type: Journal Article ISSN: 0033-295X Standard No.: 10.1037/h0027419 doi Subjects--Topical Terms: Extinction, PsychologicalFrustrationReinforcement Schedule