In all spoken languages, concepts - objects, ideas, events,
feelings - are symbolized by words, each language having a set of words
which makes up its vocabulary. The words directly represent the concepts
and we use these words in an accepted linguistic system precisely to
convey concepts. This is the principal function of language.
The concepts symbolized in a particular language depend on the needs
of the users. What is important in one culture may not be important in
another. For example, whether the snow covering the ground is wet or
dry, powdery or packed is crucial information in the daily lives of the
Eskimos. Their language reflects this: they have several different words
for snow.
A difficulty thus arises when ASL is criticized for being "conceptual" rather
than word-based." ASL is in this respect no different from spoken
languages, since the principal function of language is to convey concepts.
However, in a sign language, concepts are represented by signs rather
than words, the signs of a sign language being the equivalents of words
in a spoken langauge. The individual signs are made by combining simultaneously
handshapes, movements of the hand(s), and their locations on or near
the body. Words are made by combining certain vocal sounds in a particular
way.
The assumption that signs should refer to words rather than concepts
is based on a serious misconception regarding the nature of ASL. ASL
is not a code for English. It is an independent language in which the
signs directly represent the concepts. The signs of ASL are the equivalent
of the words in English. In effect, the expectation that ASL should be
word-based indicates a misunderstanding according to which spoken language
is the only legitimate way to symbolize our conception of reality.
The word apple (whether in spoken
or printed form) and the sign
(in American Sign Language) directly represent the fruit illustrated.
The letters "DM" which follow some of the illustrations
in the text are an abbreviation for "double movement" and indicate
that the movement shown by the arrow(s) is to be made twice.