Of Human Language: Fast or Slow to Develop?

One thing most fun about science is a debate between researchers about conflicting theories. 

Take the human ability to communicate often quite complex ideas through language.  The generally accepted idea is that our human precursors had a limited ability to speak based on the size of the hole in our skulls through which a nerve passed.  This nerve communicates between the speech center of our brain and the muscles in the throat and tongue that allows us to form words and create sounds.

Physical anthropologists tell us that in more primitive human species this hole was quite small, limiting the size of the nerve and therefore limiting the complexity of words we could say.  When Jean Auele wrote her Earth's Children series, the Neandertals in her books used some words but more gestures and facial expressions to get ideas across.

This wasn't a plot device.  It was based on the fact that this hole in Neandertal skulls is smaller than in fully modern humans like you and I.  The lesson for any author or screenwriter is the value of research in creating plot, setting and character.

The question becomes, did modern humans have fully developed language from our first appearance?  Remember, our predecessors did communicate well-enough to survive.  Or, as many researchers feel, did our modern languages evolve over time, which is the most commonly held view.

Here's a dissenting view from Shigeru Miyagawa, Professor of Linguistics and the Kochi Prefecture-John Manjiro Professor in Japanese Language and Culture at MIT that is creating a stir in research and academic circles.  Professor Miyagawa's position is explained best as:

"human language likely developed
quite rapidly into a sophisticated system."

For writers of prehistoric fiction, this argument might add interesting depth and conflict in your works.

Here's the report:
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The rapid rise of human language
Human language likely developed quite rapidly into a sophisticated system, a linguist contends. Instead of mumbles and grunts, people deployed syntax and structures resembling the ones we use today, this expert suggests.

At some point, probably 50,000 to 100,000 years ago, humans began talking to one another in a uniquely complex form. It is easy to imagine this epochal change as cavemen grunting, or hunter-gatherers mumbling and pointing. But in a new paper, an MIT linguist contends that human language likely developed quite rapidly into a sophisticated system: Instead of mumbles and grunts, people deployed syntax and structures resembling the ones we use today.

"The hierarchical complexity found in present-day language is likely to have been present in human language since its emergence," says Shigeru Miyagawa, Professor of Linguistics and the Kochi Prefecture-John Manjiro Professor in Japanese Language and Culture at MIT, and a co-author of the new paper on the subject.

To be clear, this is not a universally accepted claim: Many scholars believe that humans first started using a kind of "proto-language" -- a rudimentary, primitive kind of communication with only a gradual development of words and syntax. But Miyagawa thinks this is not the case. Single words, he believes, bear traces of syntax showing that they must be descended from an older, syntax-laden system, rather than from simple, primal utterances.

"Since we can find syntax within words, there is no reason to consider them as 'linguistic fossils' of a prior, presyntax stage," Miyagawa adds.

Becoming Human:
 The Development of
Language, Self and
Self-Consciousness
by John V. Canfield

Click on image to order
Miyagawa has an alternate hypothesis about what created human language: Humans alone, as he has asserted in papers published in recent years, have combined an "expressive" layer of language, as seen in birdsong, with a "lexical" layer, as seen in monkeys who utter isolated sounds with real-world meaning, such as alarm calls. Miyagawa's "integration hypothesis" holds that whatever first caused them, these layers of language blended quickly and successfully.

Word to the wise
Miyagawa's paper is published this month in the peer-reviewed journal Frontiers in Psychology. Vitor A. Nobrega of the University of Sao Paulo co-authored the paper.

In the paper, Nobrega and Miyagawa write that a single word can be "internally complex, often as complex as an entire phrase," making it less likely that words we use today are descended from a presyntax mode of speech.

To see a straightforward example of this in English, take "nationalization," Miyagawa suggests. It starts with "nation," a noun; adds "-al" to create an adjective; adds "-iz(a)" to form a verb; and ends with "-tion," to form another noun, albeit with a new meaning.

"Hierarchical structure is present not only in single words, but also in compounds, which, contrary to the claims of some, are not the structureless fossilized form of a prior stage," Miyagawa says.
In their paper, Nobrega and Miyagawa hold that the same analysis applies to words in Romance languages that have been described elsewhere as remnants of formless proto-languages. In Brazilian Portuguese, "porta asciuga-mani" -- literally "carry dry-hands," but today colloquially meaning "towel holder" -- is one such case, they contend, where a compound derived from old words has a clear internal structure. (In this case, "dry hands" is a complement to the verb.)

Miyagawa's integration hypothesis is connected intellectually to the work of other MIT scholars, such as Noam Chomsky, who have contended that human languages are universally connected and derive from our capacity for using syntax. In forming, this school of thought holds, languages have blended expressive and lexical layers through a system Chomsky has called "Merge."

"Once Merge has applied integrating these two layers, we have essentially all the features of a full-fledged human language," Miyagawa says.

Related stories:
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Story Source:  Materials provided by Massachusetts Institute of Technology.  Vitor A. Nóbrega, Shigeru Miyagawa. The precedence of syntax in the rapid emergence of human language in evolution as defined by the integration hypothesis. Frontiers in Psychology, 2015

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