Paper in Learning & Behavior
  • Kwok, D. W. S., Livesey, E. J. & Boakes, R. A. (2012). Serial overshadowing of taste aversion learning by stimuli preceding the target taste. Learning & Behavior, DOI: 10.3758/s13420-011-0064-0.

    Three experiments tested whether events taking place before a rat has access to a target taste, sucrose, can proactively interfere with the acquisition of a sucrose aversion when sucrose is followed by a lithium chloride injection. Using a serial overshadowing procedure with various delays before lithium injection, proactive interference by a taste (Experiments 1 and 3) and by a novel context (Experiment 2) was found following two conditioning sessions, but not after a single conditioning session. Conversely, overshadowing by a taste given after the target was detectable after a single conditioning trial (Experiment 3) and, thus, indicated that retroactive interference involves a process different from that producing proactive interference. A simulation confirmed that the results are consistent with a modified Rescorla and Wagner (1972) interpretation of Revusky's (1971) concurrent interference theory of delay learning.