Infant Vervet Monkeys Can Match Faces and Voices of Other Species
Author Information
Author(s): Shahin Zangenehpour, Asif A. Ghazanfar, David J. Lewkowicz, Robert J. Zatorre
Primary Institution: Montreal Neurological Institute, McGill University
Hypothesis
Do infant vervet monkeys exhibit cross-species intersensory matching despite having no prior experience with the species?
Conclusion
Infant vervet monkeys can recognize the correspondence between the faces and voices of another species, and they do so at ages when human infants already show perceptual narrowing.
Supporting Evidence
- Infant vervets spent more time looking at the non-matching face, indicating they recognized the correspondence between faces and voices.
- Both younger and older vervet infants showed evidence of intersensory matching despite being beyond the age of perceptual narrowing in humans.
- Pupillary responses indicated greater dilation when looking at matching face/voice combinations, suggesting increased salience.
Takeaway
Baby vervet monkeys can tell when a face and a voice belong together, even if they've never seen that type of monkey before.
Methodology
Infant vervet monkeys were tested for their ability to match faces and voices of rhesus monkeys using a preferential looking method.
Potential Biases
The vervets were raised in captivity and may have had atypical exposure to human faces and voices.
Limitations
The study was conducted in a controlled environment, which may not reflect natural conditions.
Participant Demographics
Infant vervet monkeys aged 23 to 65 weeks.
Statistical Information
P-Value
p=0.021
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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