1. The strength of conditioned reinforcers as a function of frequency and probability of reinforcement;Autor,1969
2. Curiosity and exploration.;Berlyne;Science,1966
3. Reinforcement values of visual patterns compared through concurrent performances.;Berlyne;Journal of the Experimental Analysis of Behavior,1972
4. Free will and determinism.;Berofsky,1966
5. Variability of response location on fixed-ratio and fixed-interval schedules of reinforcement.;Boren;Journal of the Experimental Analysis of Behavior,1978