Statistics on Speech & Language Disorders
- Approximately 18.5 million individuals have a speech, voice, or language disorder. [Source: National Institute on Deafness and Other Communication Disorders (2010)].
- Selective mutism is a rare, complex childhood anxiety disorder that affects a child's inability to speak and communicate in certain social settings. Selective mutism is said to affect less than 1% of school-aged children. It is slightly more common in girls than in boys. Most children are diagnosed between 3 and 8 years old. [Source: Selective Mutism Anxiety Research & Treatment Center (2014)].
- Approximately 11% of children 4-17 years of age (6.4 million) have been diagnosed with ADHD as of 2011. The average age of ADHD diagnosis is 7 years. Intelligence is normal or even gifted. Boys are 2 to 3 times more likely to be affected by the disorder than girls. ADHD often continues into adolescence, and sometimes into adulthood. The specific cause of ADHD is still unknown. [Source: Centers for Disease Control & Prevention (2013)].
- According to the International Dyslexia Association: "About 13–14% of the school population nationwide has a handicapping condition that qualifies them for special education. Current studies indicate that one half of all the students who qualify for special education are classified as having a learning disability (LD) (6–7%). About 85% of those students have a primary learning disability in reading and language processing. Nevertheless, many more people— perhaps as many as 15–20% of the population as a whole—have some of the symptoms of dyslexia, including slow or inaccurate reading, poor spelling, poor writing, or mixing up similar words".
- According to the National Stuttering Association: Nearly 3 million adults in the U.S. stutter. Stuttering is a genetically-influenced condition, meaning that it arises from a complex interaction involving childhood development, particularly language skills and motor skills, as well as the temperament of the child.
- According to the Stuttering foundation of America: About 5% of all children go through a period of stuttering that lasts six months or more. Three-quarters of those who begin to stutter will recover by late childhood, leaving about 1% of the population with a long-term problem. Stuttering affects four times as many males as females.
- According to ASHA (February 2004): data collected from July 2003 states that the average charge for speech-language treatment is $117.66
- Currently according to ASHA, there are 158,000 nationally certified SLPs.
- Biliteracy: June 2004, ASHA Leader: “developing children’s native language and literacy does promote the learning of the English language and literacy.” Also, literacy in English does not necessarily mean literacy in the home language.