1. Effects of trial-to-trial variation in magnitude of reward upon an instrumental running response;Beier,1958
2. On the combination of drive and incentive motivation;Black;Psychological Review,1965
3. Conditioning acceptance or rejection of information;Bugelski;Journal of Experimental Psychology,1966
4. Physics, the elements.;Campbell,1920
5. Ascendent-submissive behaviour in pairs of human subjects as a function of their emotional responsiveness and opinion-strength;Carment;Canadian Journal of Psychology,1961