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Updated: Jul 15, 2026
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Published on: August 21, 2015
Extinction of conditioned flavor preferences
1Brooklyn College of the City University of New York, Brooklyn, NY, USA. andrewd@brooklyn.cuny.edu
Summary
Extinction learning weakens flavor preferences in rats. However, devaluation of the nutrient reward can reverse or attenuate this effect, suggesting complex associations influence taste memory.
Area of Science:
- Behavioral neuroscience
- Learning and memory
- Sensory science
Background:
- Flavor preferences are learned through associations between tastes and their consequences.
- Extinction learning is a process where a learned association is weakened by repeated exposure without reinforcement.
Purpose of the Study:
- To investigate the impact of extinction on flavor preferences conditioned by nutrient association.
- To explore how nutrient devaluation affects these extinction-modified preferences in rats.
Main Methods:
- Four experiments involving rats were conducted.
- Rats were trained to associate flavor cues with nutrient rewards.
- Extinction procedures were applied to some flavor cues.
- Nutrient devaluation was used to test the strength of learned associations.
Main Results:
- Rats consistently preferred flavor cues that had not undergone extinction.
- Preference was reversed in thirsty rats if the nutrient was devalued.
- Preference was attenuated in hungry rats when the non-extinguished cue's nutrient was devalued.
Conclusions:
- Extinction weakens the association between a flavor cue and the sensory properties of its associated nutrient.
- For hungry rats, extinction also appears to weaken the link between flavor and the motivational aspects of the nutrient.
- These findings highlight the multifaceted nature of learned flavor preferences and the impact of associative learning.
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