Effects of CSs for food and water upon rats barpressing for different magnitudes of food reinforcement
Forty-eight albino rats were first exposed to randomly intermixed, noncontingent presentations of one pellet, six pellets, and water. For each of three groups, a CS+ was paired with one of the reinforcers, while the other two reinforcers and a CS− were presented alone. Then half the subjects experienced a six-pellet reward and half experienced a one-pellet reward for leverpresses during a light SD. Finally, on test trials, the CS+ or CS− was compounded with the light. Latencies on test trials indicated that responding for the one-pellet reward was significantly more disrupted by a CS+ for six pellets than by the CS+ for one pellet or the CS+ for water. Responding for the six-pellet reward was disrupted by the CS+ for one pellet somewhat more than by the CS+ for six pellets or water, but not significantly so. This pattern of results is partially consistent with an associative model of transfer and appears to contradict a motivational account of such effects.
Wielkiewicz, R. M. (1979). Effects of CSs for food and water upon rats barpressing for different magnitudes of food reinforcement. Animal Learning and Behavior, 7(2), 246-250. doi:10.3758/BF03209279