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Monkeys 'understand' rules underlying language musicality
Date:11/13/2013

calls and hearing predispositions, the researchers designed a sort of "musical system" for monkeys. These "musical patterns" had overall acoustic features similar to monkeys' calls, while their structural features mimicked syntactic or phonological patterns like those found in Turkish and many human languages.

Monkeys were first presented with "phrases" containing structural dependencies, and later tested using stimuli either with or without dependencies. Their reactions were measured using the "violation of expectations" paradigm. "Show up at work in your pyjamas, people will turn around and stare at you, while at a slumber party nobody will notice", explains Ravignani: In other words, one looks longer at something that breaks the "standard" pattern. "This is not about absolute perception, rather how something is categorized and contrasted within a broader system." Using this paradigm, the scientists found that monkeys reacted more to the "ungrammatical" patterns, demonstrating perception of dependencies. "This kind of experiment is usually done by presenting monkeys with human speech: Designing species-specific, music-like stimuli may have helped the squirrel monkeys' perception", argues primatologist and co-author Ruth Sonnweber.

"Our ancestors may have already acquired this simple dependency-detection ability some 30 million years ago, and modern humans would thus share it with many other living primates. Mastering basic phonological patterns and syntactic rules is not an issue for squirrel monkeys: the bar for human uniqueness has to be raised", says Ravignani: "This is only a tiny step: we will keep working hard to unveil the evolutionary origins and potential connections between language and music".


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Contact: Andrea Ravignani
andrea.ravignani@univie.ac.at
43-142-777-6101
University of Vienna
Source:Eurekalert  

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