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Published on: August 24, 2012
Olfactory stimuli and the "pseudo-extinction" effect
Science (New York, N.Y.)
|December 5, 1969
Summary
Rats reduce running speed when encountering odors from rats that underwent extinction training. These "pseudo-extinction" odors can confound experiments using aversive stimuli.
Area of Science:
- Behavioral neuroscience
- Animal behavior research
Background:
- Experimental extinction is a key paradigm in behavioral science.
- Odor cues can significantly influence animal behavior and experimental outcomes.
Purpose of the Study:
- To investigate the impact of odors from extinction-trained rats on the behavior of continuously rewarded rats.
- To identify potential confounding variables in animal studies.
Main Methods:
- Rats were continuously rewarded for running on a runway.
- The runway was subsequently traversed by rats undergoing experimental extinction.
- Running speed was measured to assess behavioral changes.
Main Results:
- Continuously rewarded rats exhibited a significant decrease in running speed on the runway previously occupied by extinction subjects.
- This effect was attributed to discriminable olfactory cues (odors) from the extinction subjects.
Conclusions:
- Olfactory cues from extinction-trained animals can induce a "pseudo-extinction" effect in naive subjects.
- Researchers must consider olfactory confounds in studies involving aversive stimulation or extinction paradigms.
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