Serial overshadowing of taste aversion learning by stimuli preceding the target taste |
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| Authors: | Dorothy W S Kwok Evan J Livesey Robert A Boakes |
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| Institution: | 1. University of Sydney, Sydney, Australia
2. School of Psychology (A18), University of Sydney, Sydney, NSW, 2006, Australia
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| Abstract: | 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. |
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