Sign language is a language consisting of hand, face and facial expressions used by the hearing impaired to communicate with each other.

Sign language is the mother tongue for hearing impaired individuals. Therefore, the best way for hearing impaired individuals to access information and to ensure communication is through the use of the sign language.



According to the statistics provided by the World Health Organization, there are 466 million hearing impaired individuals in the world and this number is expected to be 900 million by 2050.

There are many sign languages in the world and Turkish Sign Language (TID) is used in Turkey. The grammar of Turkish Sign Language is different from the formal language. Formal language includes suffixes whereas in sign language suffixes do not exist. For instance, in Turkish, "I'm going home." and the sign language equivalent of the sentence is translated as "I go home".

Although there is a difference between official dictionaries, there are 2500 words in Turkish Sign Language and vocabulary is very weak compared to formal language. Hearing impaired individuals use plain and simple words as possible when communicating with sign language.

approximately 50% of the hearing impaired individuals who are literate have difficulty in understanding what they read because the difference due that formal language and sign language structures are different and the low vocabulary rate exist for sign language.

Sign language is the mother tongue for hearing impaired individuals. Therefore, the best way for hearing impaired individuals to access information and to ensure communication is through the use of the sign language.