Rhesus Monkeys and Cross-Modal Memory for Familiar Faces
Author Information
Author(s): Ikuma Adachi, Robert R. Hampton
Primary Institution: Yerkes National Primate Research Center
Hypothesis
Do rhesus monkeys have cross-modal access to visual memory for familiar conspecifics?
Conclusion
Rhesus monkeys can recognize familiar individuals through both visual and auditory cues, demonstrating spontaneous cross-modal recognition.
Supporting Evidence
- Monkeys performed significantly better than chance when matching videos to still images.
- Errors were more likely to occur when the voice heard did not match the video seen.
- Monkeys showed spontaneous recognition of familiar individuals through both visual and auditory stimuli.
Takeaway
Rhesus monkeys can remember their friends' faces and voices, even if they only see a video of them.
Methodology
Monkeys were trained to match video clips of familiar individuals to photographs, with auditory cues introduced in later trials to test cross-modal recognition.
Potential Biases
Potential bias due to the specific social environment and training conditions of the monkeys.
Limitations
The study's findings may not generalize to all primate species or contexts, and the sample size was small.
Participant Demographics
Five 4-year-old male rhesus monkeys raised in semi-natural social groups.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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