Re: John has been assimilated
From: David Hanig
Message: 1392
Date: 2000-02-06
As a rank amateur, I am always a bit hesitant to voice my ideas on this
forum, but here goes:
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About 25 years ago, I wrote a college paper (which I can't put my hands
on) on the subject of when language originated. I took a somewhat
different tack:
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The literature on early childhood development indicates that
infants/toddlers have an innate linguistic ability which, through
interaction with speakers in child's environment, leads to the rapid
development of language. This native tendency is found in deaf infants
who will articulate many sounds of speech in the early months of life.
Over time, this ability diminishes due to the lack of reinforcing
feedback. This innate ability is also reflected in the construction of
our brains. The left temporal regions of the brain (e.g., Broca's
area, Wierneke's (sp?) area, etc.) are unique to our species. When
comparing humans to chimpanzees, researchers have found that chimps
have sufficient intellect to manipulate linguistic symbols, including
visual keys and sign language. The difference between chimp and human
is not the cognitive ability to use symbols; it's the accretion of new
cortical areas in the left temporal lobe, as well as neurological
changes to allow very fine motor activity in the mouth, tongue and
throat.
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We are "hard-wired" to acquire language. Given the evidence for this
innate ability (what Noam Chomsky called "Language Acquisition Device),
it is unlikely that language arose as a cultural artifact in H. Sapiens
history; it was probably already present when our species emerged.
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So, if we already had the physiological traits necessary for language,
when and how did it develop?
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One approach is to examine brain cases of H. Erectus, H. Habilis,
specimens to look for evidence of left temporal lobe expansion. (I
believe that some work has been done in this regard - but can no longer
recall the specific findings.)
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Another avenue to explore is _behavioral_ evidence of language
acquisition. Language is a key component of cognitive development.
Piaget and later researchers observed how children use language to link
a sequence of activities to achieve a desired result. A child building
with blocks says things like, "First I put this here; then I can put
that one there . . . ". Language appears to be a helpful, perhaps
necessary, component for manipulative activities which require a
sequence of steps. It appears that language serves to bridge the gap
between now and the future. Perhaps it is difficult for us to "hold"
the idea of a future outcome without symbols to mediate.
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This is supported by the fact that deaf children who are pre-linguistic
have great difficulty accomplishing developmental cognitive tasks, such
as building a complex block structure. Once they acquire a language,
such as sign language, they are often able to catch up to the cognitive
developmental phase of their peers.
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If a symbolic system is necessary to complete a complex sequence of
manipulations, early hominid tools may reveal something about the
linguistic abilities of our predecessors. Refinements in hominid
tool-making may parallel and reflect growing linguistic ability.
Futhermore, it may be possible to triangulate the evidence from two
sources: the morphological changes in hominid brain cases, AND the
develpment of more complex tools which would have required language.
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If this hypothesis is true, then the evolution of language may have
been gradual, growing in sophistication as certain areas of the brain
evolved.
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As for pre-sapiens human species having language - sure, but probably
not language in the "modern" sense. This, I think, was invented very
approximately 50,000 years ago. Before this time cultural change was
glacially slow (the Acheulean culture lasted more than 1,000,000
years!)and there is little if any evidence of art, personal adornment,
use of symbols or religion, either for H. sapiens and other human
species.
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Tommy, H.sapiens was in Australia and making art 60,000 years ago, a
feat only possible with libguistic skills. Whilst Acheulian had lasted
1 million years and Mousterian had lasted at least 150,000, it seems
that there was a greater variety in non-lithic cultures than the
uniformity that appears in Stone tools.
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All this changes rather abruptly about midway through the last
glaciation, and only for H. sapiens. Up to this time H. sapiens does
not seem to have been competitively superior to neandertalers (who
displaced sapiens in the Near East when climate grew colder), but by
30,000 BP neandertalers were extinct, also cultural change became at
least an order of magnitude faster (most late Paleolithic cultures only
last a few thousand years). Many archaeologists think that this "change
of tempo" marks the invention of fully modern language and I must say
it seems very likely.
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Language may have been invented once or several times in different
places, e. g. in Greater Australia which was populated by 40,000 BP at
the latest, and which has always been rather isolated from the rest of
the World. There is really no way of telling, though it might
conceivably be possible in the future to trace the spread of Upper
Paleolithic cultures in enough detail to see if it happened from one or
several centra.