Are expectancies based upon different positive reinforcing events discriminably different?

Hull, 1943 Hull, 1952 Hyde, 1968, Facilitative effect of a CS for reinforcement as a function of reinforcement magnitude: a test of incentive motivation theory, Journal of Experimental Psychology, 73, 423, 10.1037/h0026477 Konorski, 1964, Some problems concerning the mechanism of instrumental conditioning, Acta Biologiae Experimentalis, 24, 59 Konorski, 1967 Rescorla, 1967, Two process learning theory: Relationships between Pavlovian conditioning and instrumental learning, Psychological Review, 74, 151, 10.1037/h0024475 Spence, 1956 Trapold, 1962, The effect of incentive motivation on an unrelated startle reflex, Journal of Comparative and Physiological Psychology, 55, 1034, 10.1037/h0048179 Trapold, M. A., & Overmier, J. B. The second learning process in instrumental learning In W. Prokasy & A. Black (Eds.), Classical conditioning: A symposium, in press.