The
Features Of Human Language
Hockett isolated 13 features that characterize human language and
which distinguish it from other communication systems. The following diagram
graphically represents each of the thirteen features. Each feature is numbered
and listed below the diagram, along with a more developed discussion of the
feature.
1. Vocal-auditory channel -- This means that the standard human language occurs as a vocal
(making sounds with the mouth) type of communication which is perceived by
hearing it. There are obvious exceptions: writing and sign language are
examples of communication in the manual-visual channel. However, the vast
majority of human languages occur in the vocal-auditory channel as their basic
mode of expression. Writing is a secondary, and somewhat marginal form of
language, while sign languages are in limited use, mostly among deaf people who
are limited in their ability to use the auditory part of the vocal-auditory
channel.
2. Broadcast transmission and directional reception -- This means that the human language signal is
sent out in all directions, while it is perceived in a limited direction. For
spoken language, the sound perpetuates as a waveform that expands from the
point of origin (the mouth) in all directions. This is why a person can stand in
the middle of a room and be heard by everyone (assuming they are speaking
loudly enough). However, the listener hears the sound as coming from a
particular direction and is notably better at hearing sounds that are coming
from in front of the them than from behind them.
3. Rapid fading (transitoriness) -- This means that the human language signal
does not persist over time. Speech waveforms fade rapidly and cannot be heard
after they fade. This is why it is not possible to simply say "hello"
and have someone hear it hours later. Writing and audio-recordings can be used
to record human language so that it can be recreated at a later time, either by
reading the written form, or by playing the audio-record.
4. Interchangeability -- This means that the speaker can both receive and broadcast the
same signal. This is distinctive from some animal communications such as that
of the sticklefish. The sticklefish make auditory signals based on gender
(basically, the males say "I'm a boy" and the females say "I'm a
girl"). However, male fish cannot say "I'm a girl," although
they can perceive it. Thus, sticklefish signals are not interchangeable.
5. Total feedback -- this means that the speaker can hear themself
speak and can monitor their language performance as they go. This differs from
some other simple communication systems, such as traffic signals. Traffic signs
are not normally capable of monitor their own functions (a red light can't tell
when the bulb is burned out, i.e.).
6. Specialization -- This means that the organs used for producing
speech are specially adapted to that task. The human lips, tongue, throat, etc.
have been specialized into speech apparati instead of being merely the eating
apparati they are in many other animals. Dogs, for example, are not physically
capable of all of the speech sounds that humans produce, because they lack the
necessary specialized organs.
7. Semanticity -- This means that specific signals can be
matched with specific meanings. This is a fundamental aspect of all
communication systems. For example, in French, the word selmeans a white, crystalline substance consisting of sodium and
chlorine atoms. The same substance is matched with the English word salt. Anyone speaker of these languages will recognize that the signal sel or salt refers to the substance sodium chloride.
8. Arbitrariness -- This means that there is no necessary
connection between the form of the signal and the thing being referred to. For
example, something as large as a whale can be referred to by a very short word.
Similarly, there is no reason that a four-legged domestic canine should be
called a dog and not a chien or a perro or an anjing (all words for 'dog' in other languages).
Onomatopoeic words such as "meow" or "bark" are often cited
as counter-examples, based on the argument that they are pronounced like the
sound they refer to. However, the similarity if very loose (a dog that actually
said "bark" would be very surprising) and does not always hold up
across languages (Spanish dogs, for example, say "guau"). So, even
onomatopoeic words are, to some extent, arbitrary.
9. Discreteness -- This means that the basic units of speech
(such as sounds) can be categorized as belonging to distinct categories. There
is no gradual, continuous shading from one sound to another in the linguistics
system, although there may be a continuum in the real physical world. Thus
speakers will perceive a sound as either a [p] or a [b], but not as blend, even if physically it falls somewhere
between the two sounds.
10. Displacement -- This means that the speaker can talk about
things which are not present, either spatially or temporally. For example,
human language allows speakers to talk about the past and the future, as well
as the present. Speakers can also talk about things that are physically distant
(such as other countries, the moon, etc.). They can even refer to things and
events that do not actually exist (they are not present in reality) such as the
Easter Bunny, the Earth having an emperor, or the destruction of Tara in Gone with the Wind.
11. Productivity -- This means that human languages allow
speakers to create novel, never-before-heard utterances that others can
understand. For example, the sentence "The little lavender men who live in
my socks drawer told me that Elvis will come back from Mars on the 10th to do a
benefit concert for unemployed Pekingese dogs" is a novel and
never-before-heard sentence (at least, I hope it is!), but any fluent speaker
of English would be able to understand it (and realize that the speaker was not
completely sane, in all probability).
12. Traditional Transmission -- This means that human language is not something inborn.
Although humans are probably born with an ability to do language, they must
learn, or acquire, their native language from other speakers. This is different
from many animal communication systems where the animal is born knowing their
entire system, e.g. bees are born knowing how to dance and some birds are born
knowing their species of bird-songs (this is not true of all birds).
13. Duality of patterning -- This means that the discrete parts of a language can be
recombined in a systematic way to create new forms. This idea is similar to
Productivity (Feature 11). However, Productivity refers to the ability to
generate novel meanings, while Duality of patterning refers to the ability to
recombine small units in different orders.
