Using Sign Language with Your Baby

A sign language (also signed language) is a language which, instead of acoustically conveyed sound patterns, uses visually transmitted sign patterns (manual communication, body language and lip patterns) to convey meaning—simultaneously combining hand shapes, orientation and movement of the hands, arms or body, and facial expressions to fluidly express a speaker's thoughts. Sign languages commonly develop in deaf communities, which can include interpreters, friends and families of deaf people as well as people who are deaf or hard of hearing themselves.

Wherever communities of deaf people exist, sign languages develop. In fact, their complex spatial grammars are markedly different from the grammars of spoken languages. Hundreds of sign languages are in use around the world and are at the cores of local Deaf cultures. Some sign languages have obtained some form of legal recognition, while others have no status at all.

In addition to sign languages, various signed codes of spoken languages have been developed, such as Signed English and Warlpiri Sign Language.This inclusion of the Warlpiri Sign Language (and other aboriginal sign languages) among the Manually Coded Languages, based on the presumption that natural sign languages can only develop in deaf communities, is now widely disputed (Madell 1998, O'Reilly 2005). As to their use in deaf communities, the 2008 version of the 15th edition of Ethnologue reports that "several such sign languages are also used by deaf persons."[http://www.ethnologue.com/show_language.asp?code=asw] These are not to be confused with languages, oral or signed; a signed code of an oral language is simply a signed mode of the language it carries, just as a writing system is a written mode. Signed codes of oral languages can be useful for learning oral languages or for expressing and discussing literal quotations from those languages, but they are generally too awkward and unwieldy for normal discourse. For example, a teacher and deaf student of English in the United States might use Signed English to cite examples of English usage, but the discussion of those examples would be in American Sign Language.

Several culturally well developed sign languages are a medium for stage performances such as sign-language poetry. Many of the poetic mechanisms available to signing poets are not available to a speaking poet.

American Sign Language (or ASL, Ameslan) is the dominant sign language of the Deaf community in the United States, in the English-speaking parts of Canada, and in some regions of Mexico. Although the United Kingdom and the United States share English as a spoken and written language, British Sign Language (BSL) is quite different from ASL, and the two sign languages are not mutually intelligible.

ASL is also used (sometimes alongside indigenous sign languages) in the Philippines, Malaysia, Singapore, Hong Kong, Dominican Republic, El Salvador, Haiti, Puerto Rico, Côte d'Ivoire, Burkina Faso, Ghana, Togo, Benin, Nigeria, Chad, Gabon, Democratic Republic of the Congo, Central African Republic, Mauritania, Kenya, Madagascar, and Zimbabwe. Like other sign languages, its grammar and syntax are distinct from any spoken language in its area of influence. While there has been no reliable survey of the number of people who use ASL as their primary language, estimates range from 500,000 to 2 million in the United States alone .