1. Partial reinforcement effects on vigor and persistence: Advances in frustration theory derived from a variety of eithin-subjects experiments;Amsel,1967
2. Inhibition and mediation in classical and instrumental learning;Amsel,1972
3. Behavioral habituation, counterconditioning and a general theory of persistence;Amsel,1972
4. Comparisons of different populations: Resistance to extinction and transfer;Anderson;Psychological Review,1963
5. Extinction following delayed reward: A review;Campbell;Psychonomic Monograph Supplements,1972