1. Frustration theory;Amsel,1992
2. The psychology of fear and stress;Gray,1987
3. On the dual nature of learning—a re-interpretation of “conditioning” and “problem solving”;Mowrer;Harvard Educ. Rev.,1947
4. Frustrative non-reward: a variety of punishment?;Wagner,1969
5. Resistance to punishment and extinction following training with shock or non-reinforcement;Brown;J. Exp. Psychol.,1964