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- Title
Timing of interfering events in one-trial serial overshadowing of a taste aversion.
- Authors
Kwok, Dorothy; Harris, Justin; Boakes, Robert
- Abstract
This set of experiments examined the question of when a stimulus would be most effective in overshadowing the acquisition of long-delay taste aversion learning. In Experiment 1 rats drank sucrose, the target solution, followed by a hydrochloric acid (HCl) solution before lithium injection some time later; HCl was presented either early or late in the interval. The late condition produced greater overshadowing than the early condition. The importance of the HCl-injection interval was confirmed by Experiment 2, in which the sucrose-injection interval was varied. Experiment 3 found that even placement in a different context - an event that normally produces little overshadowing of a CTA - produced one-trial overshadowing of a sucrose aversion as long as the context was novel and exposure to it occurred immediately before lithium injection. No current theoretical account of one-trial overshadowing predicts that a late event produces more overshadowing than an early event. This result can, however, be accommodated within a modified version of the Rescorla-Wagner model.
- Subjects
TASTE aversion; HYDROCHLORIC acid; RETROACTIVE interference (Psychology); LABORATORY rats; PHYSIOLOGY; ANIMAL behavior
- Publication
Learning & Behavior, 2017, Vol 45, Issue 2, p124
- ISSN
1543-4494
- Publication type
Article
- DOI
10.3758/s13420-016-0246-x