Experience Modulates Vicarious Freezing in Rats: A Model for Empathy
Author Information
Author(s): Atsak Piray, Orre Marie, Bakker Petra, Cerliani Leonardo, Roozendaal Benno, Gazzola Valeria, Moita Marta, Keysers Christian
Primary Institution: Department of Neuroscience, University Medical Center Groningen, Groningen, The Netherlands
Hypothesis
Does prior experience with footshocks modulate the vicarious freezing behavior in rats observing a conspecific receiving footshocks?
Conclusion
Rats that have previously experienced footshocks display more vicarious freezing behavior when witnessing another rat receive footshocks.
Supporting Evidence
- Experienced witness rats displayed significantly higher freezing levels than naïve witnesses during the empathy test.
- Demonstrators paired with experienced witnesses showed more freezing behavior than those paired with naïve witnesses.
- Ultrasonic vocalizations were emitted more frequently by experienced witness-demonstrator pairs compared to naïve pairs.
Takeaway
Rats can feel what their friends feel, and if they have been hurt before, they react more strongly when they see their friend in pain.
Methodology
The study involved observing interactions between witness and demonstrator rats during footshock exposure, measuring freezing behavior and ultrasonic vocalizations.
Potential Biases
Potential biases may arise from the handling and habituation of the rats prior to the experiments.
Limitations
The study did not examine the effects of the estrous cycle on vicarious freezing behavior.
Participant Demographics
Adult female Long-Evans rats were used in the study.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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