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The term developmental language disorder (DLD) was endorsed in a consensus study involving a panel of experts (CATALISE Consortium) in 2017. [3] The study was conducted in response to concerns that a wide range of terminology was used in this area, with the consequence that there was poor communication, lack of public recognition, and in some cases children were denied access to services.
The following is a list of language disorders. A language disorder is a condition defined as a condition that limits or altogether stops natural speech . A language disorder may be neurological, physical, or psychological in origin.
Dyslexia is a common language-based learning disability. Dyslexia can affect reading fluency, decoding, reading comprehension, recall, writing, spelling, and sometimes speech and can exist along with other related disorders. [15] The greatest difficult those with the disorder have is with spoken and the written word.
A primary language disorder is one that cannot be attributed to an underlying disorder and is solely responsible for the language disturbance while a secondary language disorder is the result of another disorder. [12] Language disorders can also be categorized as developmental or acquired.
Specific language impairment (SLI) (the term developmental language disorder is preferred by some) [1] is diagnosed when a child's language does not develop normally and the difficulties cannot be accounted for by generally slow development, physical abnormality of the speech apparatus, autism spectrum disorder, apraxia, acquired brain damage or hearing loss.
For example, Chinese, which is a fully logographic orthography, has comparable rates of dyslexia (3.9%) to that of shallow alphabetic orthographies such as Italian (3.2%) while English, which is a deep alphabetic orthography, has much higher rates of up to 10%. [20]
A language disorder is an impairment in the ability to understand and/or use words in context, both verbally and nonverbally. Some characteristics of language disorders include improper use of words and their meanings, inability to express ideas, inappropriate grammatical patterns, reduced vocabulary and inability to follow directions. One or a ...
Many observations suggest a genetic cause of DVD, as many with the disorder have a family history of communication disorders. [ 1 ] [ 3 ] [ 4 ] [ 5 ] The gene FOXP2 has been implicated in many studies of the condition, and when this is the cause, the condition is inherited in an autosomal dominant manner, however roughly 75% of these cases are ...