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Wikipedia

Stuttering

Stuttering, also known as stammering, is a speech disorder characterized externally by involuntary repetitions and prolongations of sounds, syllables, words, or phrases as well as involuntary silent pauses or blocks in which the person who stutters is unable to produce sounds.[2][3]

Stuttering
Other namesStammering, alalia syllabaris, alalia literalis, anarthria literalis, dysphemia[1]
SpecialtySpeech–language pathology
SymptomsInvoluntary sound repetition and disruption or blocking of speech
Usual onset2–5 years
DurationLong term
CausesNeurological and genetics
Differential diagnosisDysphonia[1]
TreatmentSpeech therapy, support
Prognosis75-80% developmental resolves by late childhood; 15-20% of cases last into adulthood
FrequencyAbout 1%

The term stuttering as defined by listeners is most commonly associated with involuntary sound repetition, but it also encompasses the abnormal hesitation or pausing before speech, referred to by people who stutter as blocks, and the prolongation of certain sounds, usually vowels or semivowels. According to adults who stutter, stuttering is defined as a "constellation of experiences" expanding beyond the external disfluencies that are apparent to the listener. In fact, most of the experience of stuttering is internal and encompasses more experiences beyond the external speech disfluencies that are not observable by the listener. The moment of stuttering often begins before the disfluency is produced, described as a moment of anticipation - where the person who stutters knows which word they are going to stutter on.[4] The sensation of losing control and anticipation of a stutter can lead people who stutter to react in different ways including behavioral and cognitive reactions. Some behavioral reactions can manifest outwardly and be observed as physical tension or struggle anywhere in the body.[4] Almost 80 million people worldwide stutter, about 1% of the world's population.[5]

Stuttering is not connected to the physical production of speech sounds or putting thoughts into words. Acute nervousness and stress are not thought to cause stuttering, but they can trigger stuttering in people who have the speech disorder, and living with a stigmatized disability can result in anxiety and high allostatic stress load (chronic nervousness and stress). Neither acute nor chronic stress, however, itself creates any predisposition to stuttering.

The disorder is variable, which means that in certain situations, such as talking on the telephone or in a large group, the stuttering might be more or less noticeable. People who stutter often find that their stuttering fluctuates, sometimes at random.[6]

Characteristics edit

Audible disfluencies edit

Common stuttering behaviors are observable signs of speech disfluencies, for example: repeating sounds, syllables, words or phrases, silent blocks and prolongation of sounds.

  • Repeated movements
    • Syllable repetition—a single syllable word is repeated (for example: on—on—on a chair) or a part of a word which is still a full syllable such as "un—un—under the ..." and "o—o—open".
    • Incomplete syllable repetition—an incomplete syllable is repeated, such as a consonant without a vowel, for example, "c—c—c—cold".
    • Multi-syllable repetition—more than one syllable such as a whole word, or more than one word is repeated, such as "I know—I know—I know a lot of information."
  • Prolongations
    • With audible airflow—prolongation of a sound occurs such as "mmmmmmmmmom".
    • Without audible airflow—such as a block of speech or a tense pause where no airflow occurs and no phonation occurs.

Outward physical behaviors edit

People who stutter may have reactions, avoidance behaviors, or secondary behaviors related to their stuttering that may look like struggle and tension in the body. These could range anywhere from tension in the head and neck, behaviors such as snapping or tapping, or facial grimacing.

Behavioral reactions edit

These behavioral reactions are those that might not be apparent to listeners and only be perceptible to people who stutter. Some people who stutter exhibit covert behaviors such as avoiding speaking situations, substituting words/phrases when they know they are going to stutter, or use other methods to hide their stutter.[4]

Feelings and attitudes edit

Stuttering could have a significant negative cognitive and affective impact on the person who stutters. Joseph Sheehan described this in terms of the analogy to an iceberg, with the immediately visible and audible symptoms of stuttering above the waterline and a broader set of symptoms such as negative emotions hidden below the surface.[7] Feelings of embarrassment, shame, frustration, fear, anger, and guilt are frequent in people who stutter, and may increase tension and effort.[8] With time, continued negative experiences may crystallize into a negative self-concept and self-image. People who stutter may project their own attitudes onto others, believing that the others think them nervous or stupid. Such negative feelings and attitudes may need to be a major focus of a treatment program.[8]

The impact of discrimination against stuttering can be severe. This may result in fears of stuttering in social situations, self-imposed isolation, anxiety, stress, shame, low self-esteem, being a possible target of bullying or discrimination, or feeling pressured to hide stuttering. In popular media, stuttering is sometimes seen as a symptom of anxiety, but there is no direct correlation in that direction.[9]

Alternatively, there are those who embrace stuttering pride and encourage other stutterers to take pride in their stutter and to find how it has been beneficial for them.

Associated conditions edit

Stuttering can co-occur with other disabilities. These associated disabilities include:

Causes edit

The cause of developmental stuttering is complex and thought to be neurological with a genetic factor.[24][25]

A variety of hypotheses and theories suggest multiple factors contributing to stuttering. There is strong evidence that stuttering has a genetic basis.[26] Children who have first-degree relatives who stutter are three times as likely to develop a stutter.[27] In a 2010 article, three genes were found by Dennis Drayna and team to correlate with stuttering: GNPTAB, GNPTG, and NAGPA. Researchers estimated that alterations in these three genes were present in 9% of those who have a family history of stuttering.[28][29][30]

There is evidence that stuttering is more common in children who also have concurrent speech, language, learning or motor difficulties. For some people who stutter, congenital factors may play a role. In others, there could be added impact due to stressful situations.[26]

There is evidence for structural and functional differences in the brains of stutterers. Research is complicated by the possibility that such differences could be the consequences of stuttering rather than a cause.[31][32][obsolete source]

Other much less common causes of stuttering include neurogenic stuttering (stuttering that occurs secondary to brain damage, such as after a stroke) and psychogenic stuttering (stuttering related to a psychological condition).[33]

History of causes edit

Auditory processing deficits have also been proposed as a cause of stuttering. Stuttering is possibly less prevalent in deaf and hard-of-hearing individuals,[34] and stuttering is occasionally reduced when auditory feedback is altered, such as by masking, delayed auditory feedback (DAF), or frequency altered feedback.[35]

There is evidence of differences in linguistic processing between people who stutter and people who do not.[36] Brain scans of adult stutterers have found greater activation of the right hemisphere, which is associated with emotions, than of the left hemisphere, which is associated with speech. In addition, reduced activation in the left auditory cortex has been observed.[37]

The capacities and demands model has been proposed to account for the heterogeneity of the disorder. In this approach, speech performance varies depending on the capacity that the individual has for producing fluent speech, and the demands placed upon the person by the speaking situation. Demands may be increased by internal factors or inadequate language skills or external factors. In stuttering, the severity of the disorder is seen as likely to increase when demands placed on the person's speech and language system exceed their capacity to deal with these pressures.[38] However, the precise nature of the capacity or incapacity has not been delineated.

Another theory is that adults who stutter have elevated levels of the neurotransmitter dopamine, and have thus found dopamine antagonists that reduce stuttering.[24] Overactivity of the midbrain has been found at the level of the substantia nigra extended to the red nucleus and subthalamic nucleus, which all contribute to the production of dopamine.[31] However, increased dopamine does not imply increased excitatory function since dopamine's effect can be both excitatory or inhibitory depending upon which dopamine receptors have been stimulated.

It was once thought that forcing a left-handed student to write with their right-hand caused stuttering due to bias against left-handed people, but this myth died out.[39][40][41]

Diagnosis edit

Some characteristics of stuttered speech are not as easy for listeners to detect. As a result, diagnosing stuttering requires the skills of a licensed speech–language pathologist (SLP). Diagnosis of stuttering employs information both from direct observation of the individual and information about the individual's background, through a case history.[42] The SLP may collect a case history on the individual through a detailed interview or conversation with the parents (if client is a child). They may also observe parent-child interactions and observe the speech patterns of the child's parents.[43] The overall goal of assessment for the SLP will be (1) to determine whether a speech disfluency exists, and (2) assess if its severity warrants concern for further treatment.

During direct observation of the client, the SLP will observe various aspects of the individual's speech behaviors. In particular, the therapist might test for factors including the types of disfluencies present (using a test such as the Disfluency Type Index (DTI)), their frequency and duration (number of iterations, percentage of syllables stuttered (%SS)), and speaking rate (syllables per minute (SPM), words per minute (WPM)). They may also test for naturalness and fluency in speaking (naturalness rating scale (NAT), test of childhood stuttering (TOCS)) and physical concomitants during speech (Riley's Stuttering Severity Instrument Fourth Edition (SSI-4)).[43] They might also employ a test to evaluate the severity of the stuttering and predictions for its course. One such test includes the stuttering prediction instrument for young children (SPI), which analyzes the child's case history, and stuttering frequency in order to determine the severity of the disfluency and its prognosis for chronicity for the future.[44]

Stuttering is a multifaceted, complex disorder that can impact an individual's life in a variety of ways. Children and adults are monitored and evaluated for evidence of possible social, psychological or emotional signs of stress related to their disorder. Some common assessments of this type measure factors including: anxiety (Endler multidimensional anxiety scales (EMAS)), attitudes (personal report of communication apprehension (PRCA)), perceptions of self (self-rating of reactions to speech situations (SSRSS)), quality of life (overall assessment of the speaker's experience of stuttering (OASES)), behaviors (older adult self-report (OASR)), and mental health (composite international diagnostic interview (CIDI)).[45]

Clinical psychologists with adequate expertise can also diagnose stuttering per the DSM-5 diagnostic codes.[46] The DSM-5 describes "Childhood-Onset Fluency Disorder (Stuttering)" for developmental stuttering, and "Adult-onset Fluency Disorder". However, the specific rationale for this change from the DSM-IV is ill-documented in the APA's published literature, and is felt by some to promote confusion between the very different terms fluency and disfluency.[citation needed]

Normal disfluency edit

Preschool aged children often have difficulties with speech concerning motor planning and execution; this often manifests as disfluencies related to speech development (referred to as normal dysfluency or "other disfluencies").[33] This type of disfluency is a normal part of speech development and temporarily present in preschool-aged children who are learning to speak.[33][47]

Classification edit

Developmental stuttering is stuttering that originates when a child is learning to speak and may persist as the child matures into adulthood. Stuttering that persists after the age of seven is classified as persistent stuttering.[33]

Neurogenic stuttering (stuttering that occurs secondary to brain damage, such as after a stroke) and psychogenic stuttering (stuttering related to a psychological condition) are less common and classified separately from developmental.[33]

Developmental edit

Stuttering usually begins in early childhood.[37][48] The mean onset of stuttering is 30 months.[49] With young stutterers, disfluency may be episodic, and periods of stuttering are followed by periods of relatively decreased disfluency.[50]

With time a young person who stutters might transition from easy, relaxed repetition to more tense and effortful stuttering, including blocks and prolongations. Some propose that parental reactions may affect this development. With time, secondary stuttering, including escape behaviours such as eye blinking and lip movements, may be used, as well as fear and avoidance of sounds, words, people, or speaking situations. Eventually, some become fully aware of their disorder and begin to identify themselves as stutterers. Depending on the situation, this may come with deeper frustration, embarrassment and shame.[51]

Other patterns of stuttering development have been described, including sudden onset, with the child being unable to speak, despite attempts to do so. The child usually is unable to utter the first sound of a sentence, and shows high levels of awareness and frustration. Another variety also begins suddenly with frequent word and phrase repetition, and does not include the development of secondary stuttering behaviours.

Neurogenic stuttering edit

Some stuttering is also believed to be caused by neurophysiology. Neurogenic stuttering typically appears following some sort of injury or disease to the central nervous system. Injuries to the brain and spinal cord, including cortex, subcortex, cerebellum, and even the neural pathway regions.[5]

Acquired stuttering edit

In some cases, stuttering may be acquired in adulthood as the result of a neurological event such as a head injury, tumour, stroke, or drug use. This stuttering has different characteristics from its developmental equivalent: it tends to be limited to part-word or sound repetitions, and is associated with a relative lack of anxiety and secondary stuttering behaviors. Techniques such as altered auditory feedback are not effective with the acquired type.[37][48][52]

Additionally, psychogenic stuttering may also arise after a traumatic experience such as a death, the breakup of a relationship or as the psychological reaction to physical trauma. Its symptoms tend to be homogeneous: the stuttering is of sudden onset and associated with a significant event, it is constant and uninfluenced by different speaking situations, and there is little awareness or concern shown by the speaker.[53]

Differential diagnosis edit

Other disorders with symptoms resembling stuttering, or associated disorders include autism, cluttering, Parkinson's disease, essential tremor, palilalia, spasmodic dysphonia, and selective mutism.

Treatment edit

While there is no cure for stuttering, several treatment options exist and the best option is dependent on the individual.[54] Therapy should be individualized and tailored to the specific and unique needs of the client. The speech–language pathologist and the client typically work together to create achievable and realistic goals that target communication confidence, autonomy, managing emotions and stress related to their stutter, and working on disclosure.

Fluency shaping therapy
Fluency shaping therapy trains people who stutter to speak less disfluently by controlling their breathing, phonation, and articulation (lips, jaw, and tongue). It is based on operant conditioning techniques.[55] This type of therapy is not considered best practice in the field of speech and language pathology and is potentially harmful and traumatic for clients.[56][57]
Stuttering modification therapy
The goal of stuttering modification therapy is not to eliminate stuttering but to modify it so that stuttering is easier and less effortful.[58] The most widely known approach was published by Charles Van Riper in 1973 and is also known as block modification therapy.[59] Stuttering modification therapy should not be used to promote fluent speech or presented as a cure for stuttering.
Avoidance Reduction Therapy for Stuttering (ARTS) is an effective form of modification therapy. It is a framework based on theories developed by professor Joseph Sheehan and his wife Vivian Sheehan. This framework focuses on self-acceptance as someone who stutters, and efficient, spontaneous and joyful communication, essentially, minimizing quality-of-life impact due to stuttering.[60]
Electronic fluency device
Altered auditory feedback effect can be produced by speaking in chorus with another person, by blocking out the voice of the person who stutters while they are talking (masking), by delaying slightly the voice of the person who stutters (delayed auditory feedback) or by altering the frequency of the feedback (frequency altered feedback). Studies of these techniques have had mixed results.
Medications
No medication is FDA-approved for stuttering.

Support edit

Self-help groups provide people who stutter a shared forum within which they can access resources and support from others facing the same challenges of stuttering.

Prognosis edit

Among ages 3–5, the prognosis for spontaneously recovery is about 65% to 87.5%. By 7 years of age or within the first two years of stuttering,[33][49][61] and about 74% recover by their early teens. In particular, girls are shown to recover more often.[62][63]

Prognosis is guarded with later age of onset: children who start stuttering at age 3½ years or later,[64] and/or duration of greater than 6–12 months since onset, that is, once stuttering has become established, about 18% of children who stutter after five years recover spontaneously.[65] Stuttering that persists after the age of seven is classified as persistent stuttering, and is associated with a much lower chance of recovery.[33]

Epidemiology edit

The lifetime prevalence, or the proportion of individuals expected to stutter at one time in their lives, is about 5–6%,[66] and overall males are affected two to five times more often than females.[67][68]As seen in children who have just begun stuttering, there is an equivalent number of boys and girls who stutter. Still, the sex ratio appears to widen as children grow: among preschoolers, boys who stutter outnumber girls who stutter by about a two to one ratio, or less.[68] This ratio widens to three to one during first grade, and five to one during fifth grade,[69] as girls have higher recovery rates.[62] [70] the overall prevalence of stuttering is generally considered to be approximately 1%.[71]

Cross cultural edit

Cross-cultural studies of stuttering prevalence were very active in early and mid-20th century, particularly under the influence of the works of Wendell Johnson, who claimed that the onset of stuttering was connected to the cultural expectations and the pressure put on young children by anxious parents, which has since been debunked. Later studies found that this claim was not supported by the facts, so the influence of cultural factors in stuttering research declined. It is generally accepted by contemporary scholars that stuttering is present in every culture and in every race, although the attitude towards the actual prevalence differs. Some believe stuttering occurs in all cultures and races at similar rates, about 1% of general population (and is about 5% among young children) all around the world.[26][48] A US-based study indicated that there were no racial or ethnic differences in the incidence of stuttering in preschool children.[72][64]

Different regions of the world are researched unevenly. The largest number of studies has been conducted in European countries and in North America, where the experts agree on the mean estimate to be about 1% of the general population.[73][obsolete source] African populations, particularly from West Africa, might have the highest stuttering prevalence in the world—reaching in some populations 5%, 6% and even over 9%.[74] Many regions of the world are not researched sufficiently, and for some major regions there are no prevalence studies at all.[75]

Bilingual stuttering edit

Identification edit

Bilingualism is the ability to speak two languages. Many bilingual people have been exposed to more than one language since birth and throughout childhood. Since language and culture are relatively fluid factors in a person's understanding and production of language, bilingualism may be a feature that impacts speech fluency. There are several ways during which stuttering may be noticed in bilingual children including the following.

  • The child is mixing vocabulary (code-mixing) from both languages in one sentence. This is a normal process that helps the child increase their skills in the weaker language, but may trigger a temporary increase in disfluency.[76]
  • The child is having difficulty finding the correct word to express ideas resulting in an increase in normal speech disfluency.[76]
  • The child is having difficulty using grammatically complex sentences in one or both languages as compared to other children of the same age. Also, the child may make grammatical mistakes. Developing proficiency in both languages may be gradual, so development may be uneven between the two languages.[76]

It was once believed that being bilingual would 'confuse' a child and cause stuttering, but research has debunked this myth.[77]

Stuttering may present differently depending on the languages the individual uses. For example, morphological and other linguistic differences between languages may make presentation of disfluency appear to be more or less depending on the individual case.[78]

History edit

 
Lewis Carroll, the well-known author of Alice's Adventures in Wonderland, had a stammer, as did his siblings.

Because of the unusual-sounding speech that is produced and the behaviors and attitudes that accompany a stutter, it has long been a subject of scientific interest and speculation as well as discrimination and ridicule. People who stutter can be traced back centuries to Demosthenes, who tried to control his disfluency by speaking with pebbles in his mouth.[79] The Talmud interprets Bible passages to indicate that Moses also stuttered, and that placing a burning coal in his mouth had caused him to be "slow and hesitant of speech" (Exodus 4, v.10).[79]

Galen's humoral theories were influential in Europe in the Middle Ages for centuries afterward. In this theory, stuttering was attributed to an imbalance of the four bodily humors—yellow bile, blood, black bile, and phlegm. Hieronymus Mercurialis, writing in the sixteenth century, proposed to redress the imbalance by changes in diet, reduced libido (in men only), and purging. Believing that fear aggravated stuttering, he suggested techniques to overcome this. Humoral manipulation continued to be a dominant treatment for stuttering until the eighteenth century.[80] Partly due to a perceived lack of intelligence because of his stutter, the man who became the Roman emperor Claudius was initially shunned from the public eye and excluded from public office.[79]

In and around eighteenth and nineteenth century Europe, surgical interventions for stuttering were recommended, including cutting the tongue with scissors, removing a triangular wedge from the posterior tongue, and cutting nerves, or neck and lip muscles. Others recommended shortening the uvula or removing the tonsils. All were abandoned due to the danger of bleeding to death and their failure to stop stuttering. Less drastically, Jean Marc Gaspard Itard placed a small forked golden plate under the tongue in order to support "weak" muscles.[79]

 
Notker Balbulus, from a medieval manuscript

Italian pathologist Giovanni Morgagni attributed stuttering to deviations in the hyoid bone, a conclusion he came to via autopsy.[80] Blessed Notker of St. Gall (c. 840 – 912), called Balbulus ("The Stutterer") and described by his biographer as being "delicate of body but not of mind, stuttering of tongue but not of intellect, pushing boldly forward in things Divine," was invoked against stammering.[81]

A royal Briton who stammered was King George VI. He went through years of speech therapy, most successfully under Australian speech therapist Lionel Logue, for his stammer. The Academy Award-winning film The King's Speech (2010) in which Colin Firth plays George VI, tells his story. The film is based on an original screenplay by David Seidler, who also stuttered until age 16.

Another British case was that of Prime Minister Winston Churchill. Churchill claimed, perhaps not directly discussing himself, that "[s]ometimes a slight and not unpleasing stammer or impediment has been of some assistance in securing the attention of the audience ..."[82] However, those who knew Churchill and commented on his stutter believed that it was or had been a significant problem for him.[83] His secretary Phyllis Moir commented that "Winston Churchill was born and grew up with a stutter" in her 1941 book I was Winston Churchill's Private Secretary. She related one example, "'It's s-s-simply s-s-splendid,' he stuttered—as he always did when excited." Louis J. Alber, who helped to arrange a lecture tour of the United States, wrote in Volume 55 of The American Mercury (1942) that "Churchill struggled to express his feelings but his stutter caught him in the throat and his face turned purple" and that "born with a stutter and a lisp, both caused in large measure by a defect in his palate, Churchill was at first seriously hampered in his public speaking. It is characteristic of the man's perseverance that, despite his staggering handicap, he made himself one of the greatest orators of our time."

For centuries "cures" such as consistently drinking water from a snail shell for the rest of one's life, "hitting a stutterer in the face when the weather is cloudy", strengthening the tongue as a muscle, and various herbal remedies were tried.[84] Similarly, in the past people subscribed to odd theories about the causes of stuttering, such as tickling an infant too much, eating improperly during breastfeeding, allowing an infant to look in the mirror, cutting a child's hair before the child spoke his or her first words, having too small a tongue, or the "work of the devil".[84]

Society, culture, and community edit

In popular culture edit

Stuttering community edit

Many counties have regular events and activities to get people who stutter together in mutual support. These events take place at regional, national, and international level. At a regional level, there are often stuttering support or chapter groups that look to provide a place for people who stutter in the local area to meet, discuss and learn from each other.[85][86]

At a national level, stuttering charities or groups host conferences. Conferences can vary in their focus and scope, some focus on the latest research developments, some on stuttering and the arts and others still look to provide a space for stutterers simply to come together.

There are two different international meetings of stutterers. The International Stuttering Association World Congress is primarily focused on people who stutter. There is also Joint World Congress on Stuttering and Cluttering that brings together academics, researchers, speech-language pathologists, people who stutter, and people who clutter for a focus more on research, viewpoints, and treatments for stuttering.

Historic advocacy and self-help edit

Self-help and advocacy organisations for people who stammer have reportedly been in existence since the 1920s. In 1921, a Philadelphia-based attorney who stammered, J. Stanley Smith, established the Kingsley Club. [87] Designed to support people with a stammer in the Philadelphia area, the club took inspiration for its name from Charles Kingsley. Kingsley, a nineteenth-century English social reformer and author of Westward Ho! and The Water Babies, had a stammer himself.[88]  

Whilst Kingsley himself did not appear to recommend self-help or advocacy groups for people who stammer, the Kingsley Club promoted a positive mental attitude to support its members in becoming confident speakers, in a similar way discussed by Charles Kingsley in Irrationale of Speech.

Other support groups for people who stammer began to emerge in the first half of the twentieth century. In 1935 a Stammerer's Club was established in Melbourne, Australia, by a Mr H. Collin of Thornbury.[89] At the time of its formation it had 68 members. The club was formed in response to the tragic case of a man from Sydney who "sought relief from the effects of stammering in suicide". As well as providing self-help, this club adopted an advocacy role with the intention of appealing to the Government to provide special education and to fund research into the causes of stammering.[90][91]

Disability rights movement edit

Some people who stutter, and are part of the disability rights movement, have begun to embrace their stuttering voices as an important part of their identity.[92][93] In July 2015 the UK Ministry of Defence (MOD) announced the launch of the Defence Stammering Network to support and champion the interests of British military personnel and MOD civil servants who stammer and to raise awareness of the condition.[94]

Stuttering pride edit

 
The Stuttering Pride flag symbolises the waves of stuttering pride rippling through the community.

Stuttering pride (or stuttering advocacy) is a social movement repositioning stuttering as a valuable and respectable way of speaking. The movement seeks to counter the societal narratives in which temporal and societal expectations dictate how communication takes place.[95] In this sense, the stuttering pride movement challenges the pervasive societal narrative of stuttering as a defect and instead positions stuttering as a valuable and respectable way of speaking in its own right. The movement encourages stutterers to take pride in their unique speech patterns and in what stuttering can tell us about the world. It also advocates for societal adjustments to allow stutterers equal access to education and employment opportunities, and addresses how this may impact stuttering therapy.[95]

Associations edit

See also edit

Notes edit

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Further reading edit

Listen to this article
(3 parts, 52 minutes)
 
These audio files were created from a revision of this article dated 16 January 2006 (2006-01-16), and do not reflect subsequent edits.

* Rockey, D., Speech Disorder in Nineteenth Century Britain: The History of Stuttering, Croom Helm, (London), 1980. ISBN 0-85664-809-4

  • Goldmark, Daniel. "Stuttering in American Popular Song, 1890–1930." In Lerner N (2006). Sounding Off: Theorizing Disability in Music. New York, London: Routledge. pp. 91–105. ISBN 978-0-415-97906-1.
  • Ward D (2006). Stuttering and Cluttering: Frameworks for understanding treatment. Hove and New York City: Psychology Press. ISBN 978-1-84169-334-7.

stuttering, several, terms, redirect, here, other, uses, stutter, disambiguation, stammer, disambiguation, film, stutterer, film, also, known, stammering, speech, disorder, characterized, externally, involuntary, repetitions, prolongations, sounds, syllables, . Several terms redirect here For other uses see Stutter disambiguation and Stammer disambiguation For the film see Stutterer film Stuttering also known as stammering is a speech disorder characterized externally by involuntary repetitions and prolongations of sounds syllables words or phrases as well as involuntary silent pauses or blocks in which the person who stutters is unable to produce sounds 2 3 StutteringOther namesStammering alalia syllabaris alalia literalis anarthria literalis dysphemia 1 SpecialtySpeech language pathologySymptomsInvoluntary sound repetition and disruption or blocking of speechUsual onset2 5 yearsDurationLong termCausesNeurological and geneticsDifferential diagnosisDysphonia 1 TreatmentSpeech therapy supportPrognosis75 80 developmental resolves by late childhood 15 20 of cases last into adulthoodFrequencyAbout 1 The term stuttering as defined by listeners is most commonly associated with involuntary sound repetition but it also encompasses the abnormal hesitation or pausing before speech referred to by people who stutter as blocks and the prolongation of certain sounds usually vowels or semivowels According to adults who stutter stuttering is defined as a constellation of experiences expanding beyond the external disfluencies that are apparent to the listener In fact most of the experience of stuttering is internal and encompasses more experiences beyond the external speech disfluencies that are not observable by the listener The moment of stuttering often begins before the disfluency is produced described as a moment of anticipation where the person who stutters knows which word they are going to stutter on 4 The sensation of losing control and anticipation of a stutter can lead people who stutter to react in different ways including behavioral and cognitive reactions Some behavioral reactions can manifest outwardly and be observed as physical tension or struggle anywhere in the body 4 Almost 80 million people worldwide stutter about 1 of the world s population 5 Stuttering is not connected to the physical production of speech sounds or putting thoughts into words Acute nervousness and stress are not thought to cause stuttering but they can trigger stuttering in people who have the speech disorder and living with a stigmatized disability can result in anxiety and high allostatic stress load chronic nervousness and stress Neither acute nor chronic stress however itself creates any predisposition to stuttering The disorder is variable which means that in certain situations such as talking on the telephone or in a large group the stuttering might be more or less noticeable People who stutter often find that their stuttering fluctuates sometimes at random 6 Contents 1 Characteristics 1 1 Audible disfluencies 1 2 Outward physical behaviors 1 3 Behavioral reactions 1 4 Feelings and attitudes 1 5 Associated conditions 2 Causes 2 1 History of causes 3 Diagnosis 3 1 Normal disfluency 3 2 Classification 3 2 1 Developmental 3 2 1 1 Neurogenic stuttering 3 2 2 Acquired stuttering 3 3 Differential diagnosis 4 Treatment 4 1 Support 4 2 Prognosis 5 Epidemiology 5 1 Cross cultural 5 2 Bilingual stuttering 5 2 1 Identification 6 History 7 Society culture and community 7 1 In popular culture 7 2 Stuttering community 7 3 Historic advocacy and self help 7 4 Disability rights movement 7 5 Stuttering pride 8 Associations 9 See also 10 Notes 11 Further readingCharacteristics editAudible disfluencies edit Common stuttering behaviors are observable signs of speech disfluencies for example repeating sounds syllables words or phrases silent blocks and prolongation of sounds Repeated movements Syllable repetition a single syllable word is repeated for example on on on a chair or a part of a word which is still a full syllable such as un un under the and o o open Incomplete syllable repetition an incomplete syllable is repeated such as a consonant without a vowel for example c c c cold Multi syllable repetition more than one syllable such as a whole word or more than one word is repeated such as I know I know I know a lot of information Prolongations With audible airflow prolongation of a sound occurs such as mmmmmmmmmom Without audible airflow such as a block of speech or a tense pause where no airflow occurs and no phonation occurs Outward physical behaviors edit People who stutter may have reactions avoidance behaviors or secondary behaviors related to their stuttering that may look like struggle and tension in the body These could range anywhere from tension in the head and neck behaviors such as snapping or tapping or facial grimacing Behavioral reactions edit These behavioral reactions are those that might not be apparent to listeners and only be perceptible to people who stutter Some people who stutter exhibit covert behaviors such as avoiding speaking situations substituting words phrases when they know they are going to stutter or use other methods to hide their stutter 4 Feelings and attitudes edit Stuttering could have a significant negative cognitive and affective impact on the person who stutters Joseph Sheehan described this in terms of the analogy to an iceberg with the immediately visible and audible symptoms of stuttering above the waterline and a broader set of symptoms such as negative emotions hidden below the surface 7 Feelings of embarrassment shame frustration fear anger and guilt are frequent in people who stutter and may increase tension and effort 8 With time continued negative experiences may crystallize into a negative self concept and self image People who stutter may project their own attitudes onto others believing that the others think them nervous or stupid Such negative feelings and attitudes may need to be a major focus of a treatment program 8 The impact of discrimination against stuttering can be severe This may result in fears of stuttering in social situations self imposed isolation anxiety stress shame low self esteem being a possible target of bullying or discrimination or feeling pressured to hide stuttering In popular media stuttering is sometimes seen as a symptom of anxiety but there is no direct correlation in that direction 9 Alternatively there are those who embrace stuttering pride and encourage other stutterers to take pride in their stutter and to find how it has been beneficial for them Associated conditions edit Stuttering can co occur with other disabilities These associated disabilities include attention deficit hyperactivity disorder ADHD 10 the prevalence of ADHD in school aged children who stutter is around 4 50 clarify 11 12 13 14 dyslexia 15 the prevalence rate of childhood stuttering in dyslexia is around 30 40 while in adults the prevalence of dyslexia in adults who stutter is around 30 50 16 17 18 autism 19 intellectual disability 20 language or learning disability 21 seizure disorders 19 social anxiety disorder 22 speech sound disorders 23 other developmental disorders 19 Causes editThe cause of developmental stuttering is complex and thought to be neurological with a genetic factor 24 25 A variety of hypotheses and theories suggest multiple factors contributing to stuttering There is strong evidence that stuttering has a genetic basis 26 Children who have first degree relatives who stutter are three times as likely to develop a stutter 27 In a 2010 article three genes were found by Dennis Drayna and team to correlate with stuttering GNPTAB GNPTG and NAGPA Researchers estimated that alterations in these three genes were present in 9 of those who have a family history of stuttering 28 29 30 There is evidence that stuttering is more common in children who also have concurrent speech language learning or motor difficulties For some people who stutter congenital factors may play a role In others there could be added impact due to stressful situations 26 There is evidence for structural and functional differences in the brains of stutterers Research is complicated by the possibility that such differences could be the consequences of stuttering rather than a cause 31 32 obsolete source Other much less common causes of stuttering include neurogenic stuttering stuttering that occurs secondary to brain damage such as after a stroke and psychogenic stuttering stuttering related to a psychological condition 33 History of causes edit Auditory processing deficits have also been proposed as a cause of stuttering Stuttering is possibly less prevalent in deaf and hard of hearing individuals 34 and stuttering is occasionally reduced when auditory feedback is altered such as by masking delayed auditory feedback DAF or frequency altered feedback 35 There is evidence of differences in linguistic processing between people who stutter and people who do not 36 Brain scans of adult stutterers have found greater activation of the right hemisphere which is associated with emotions than of the left hemisphere which is associated with speech In addition reduced activation in the left auditory cortex has been observed 37 The capacities and demands model has been proposed to account for the heterogeneity of the disorder In this approach speech performance varies depending on the capacity that the individual has for producing fluent speech and the demands placed upon the person by the speaking situation Demands may be increased by internal factors or inadequate language skills or external factors In stuttering the severity of the disorder is seen as likely to increase when demands placed on the person s speech and language system exceed their capacity to deal with these pressures 38 However the precise nature of the capacity or incapacity has not been delineated Another theory is that adults who stutter have elevated levels of the neurotransmitter dopamine and have thus found dopamine antagonists that reduce stuttering 24 Overactivity of the midbrain has been found at the level of the substantia nigra extended to the red nucleus and subthalamic nucleus which all contribute to the production of dopamine 31 However increased dopamine does not imply increased excitatory function since dopamine s effect can be both excitatory or inhibitory depending upon which dopamine receptors have been stimulated Main article Dopamine hypothesis of stuttering It was once thought that forcing a left handed student to write with their right hand caused stuttering due to bias against left handed people but this myth died out 39 40 41 Diagnosis editSome characteristics of stuttered speech are not as easy for listeners to detect As a result diagnosing stuttering requires the skills of a licensed speech language pathologist SLP Diagnosis of stuttering employs information both from direct observation of the individual and information about the individual s background through a case history 42 The SLP may collect a case history on the individual through a detailed interview or conversation with the parents if client is a child They may also observe parent child interactions and observe the speech patterns of the child s parents 43 The overall goal of assessment for the SLP will be 1 to determine whether a speech disfluency exists and 2 assess if its severity warrants concern for further treatment During direct observation of the client the SLP will observe various aspects of the individual s speech behaviors In particular the therapist might test for factors including the types of disfluencies present using a test such as the Disfluency Type Index DTI their frequency and duration number of iterations percentage of syllables stuttered SS and speaking rate syllables per minute SPM words per minute WPM They may also test for naturalness and fluency in speaking naturalness rating scale NAT test of childhood stuttering TOCS and physical concomitants during speech Riley s Stuttering Severity Instrument Fourth Edition SSI 4 43 They might also employ a test to evaluate the severity of the stuttering and predictions for its course One such test includes the stuttering prediction instrument for young children SPI which analyzes the child s case history and stuttering frequency in order to determine the severity of the disfluency and its prognosis for chronicity for the future 44 Stuttering is a multifaceted complex disorder that can impact an individual s life in a variety of ways Children and adults are monitored and evaluated for evidence of possible social psychological or emotional signs of stress related to their disorder Some common assessments of this type measure factors including anxiety Endler multidimensional anxiety scales EMAS attitudes personal report of communication apprehension PRCA perceptions of self self rating of reactions to speech situations SSRSS quality of life overall assessment of the speaker s experience of stuttering OASES behaviors older adult self report OASR and mental health composite international diagnostic interview CIDI 45 Clinical psychologists with adequate expertise can also diagnose stuttering per the DSM 5 diagnostic codes 46 The DSM 5 describes Childhood Onset Fluency Disorder Stuttering for developmental stuttering and Adult onset Fluency Disorder However the specific rationale for this change from the DSM IV is ill documented in the APA s published literature and is felt by some to promote confusion between the very different terms fluency and disfluency citation needed Normal disfluency edit Preschool aged children often have difficulties with speech concerning motor planning and execution this often manifests as disfluencies related to speech development referred to as normal dysfluency or other disfluencies 33 This type of disfluency is a normal part of speech development and temporarily present in preschool aged children who are learning to speak 33 47 Classification edit Developmental stuttering is stuttering that originates when a child is learning to speak and may persist as the child matures into adulthood Stuttering that persists after the age of seven is classified as persistent stuttering 33 Neurogenic stuttering stuttering that occurs secondary to brain damage such as after a stroke and psychogenic stuttering stuttering related to a psychological condition are less common and classified separately from developmental 33 Developmental edit Stuttering usually begins in early childhood 37 48 The mean onset of stuttering is 30 months 49 With young stutterers disfluency may be episodic and periods of stuttering are followed by periods of relatively decreased disfluency 50 With time a young person who stutters might transition from easy relaxed repetition to more tense and effortful stuttering including blocks and prolongations Some propose that parental reactions may affect this development With time secondary stuttering including escape behaviours such as eye blinking and lip movements may be used as well as fear and avoidance of sounds words people or speaking situations Eventually some become fully aware of their disorder and begin to identify themselves as stutterers Depending on the situation this may come with deeper frustration embarrassment and shame 51 Other patterns of stuttering development have been described including sudden onset with the child being unable to speak despite attempts to do so The child usually is unable to utter the first sound of a sentence and shows high levels of awareness and frustration Another variety also begins suddenly with frequent word and phrase repetition and does not include the development of secondary stuttering behaviours Neurogenic stuttering edit Some stuttering is also believed to be caused by neurophysiology Neurogenic stuttering typically appears following some sort of injury or disease to the central nervous system Injuries to the brain and spinal cord including cortex subcortex cerebellum and even the neural pathway regions 5 Acquired stuttering edit In some cases stuttering may be acquired in adulthood as the result of a neurological event such as a head injury tumour stroke or drug use This stuttering has different characteristics from its developmental equivalent it tends to be limited to part word or sound repetitions and is associated with a relative lack of anxiety and secondary stuttering behaviors Techniques such as altered auditory feedback are not effective with the acquired type 37 48 52 Additionally psychogenic stuttering may also arise after a traumatic experience such as a death the breakup of a relationship or as the psychological reaction to physical trauma Its symptoms tend to be homogeneous the stuttering is of sudden onset and associated with a significant event it is constant and uninfluenced by different speaking situations and there is little awareness or concern shown by the speaker 53 Differential diagnosis edit Other disorders with symptoms resembling stuttering or associated disorders include autism cluttering Parkinson s disease essential tremor palilalia spasmodic dysphonia and selective mutism Treatment editMain article Stuttering therapy While there is no cure for stuttering several treatment options exist and the best option is dependent on the individual 54 Therapy should be individualized and tailored to the specific and unique needs of the client The speech language pathologist and the client typically work together to create achievable and realistic goals that target communication confidence autonomy managing emotions and stress related to their stutter and working on disclosure Fluency shaping therapy Fluency shaping therapy trains people who stutter to speak less disfluently by controlling their breathing phonation and articulation lips jaw and tongue It is based on operant conditioning techniques 55 This type of therapy is not considered best practice in the field of speech and language pathology and is potentially harmful and traumatic for clients 56 57 Stuttering modification therapy The goal of stuttering modification therapy is not to eliminate stuttering but to modify it so that stuttering is easier and less effortful 58 The most widely known approach was published by Charles Van Riper in 1973 and is also known as block modification therapy 59 Stuttering modification therapy should not be used to promote fluent speech or presented as a cure for stuttering Avoidance Reduction Therapy for Stuttering ARTS is an effective form of modification therapy It is a framework based on theories developed by professor Joseph Sheehan and his wife Vivian Sheehan This framework focuses on self acceptance as someone who stutters and efficient spontaneous and joyful communication essentially minimizing quality of life impact due to stuttering 60 Electronic fluency deviceMain article Electronic fluency device Altered auditory feedback effect can be produced by speaking in chorus with another person by blocking out the voice of the person who stutters while they are talking masking by delaying slightly the voice of the person who stutters delayed auditory feedback or by altering the frequency of the feedback frequency altered feedback Studies of these techniques have had mixed results Medications No medication is FDA approved for stuttering Support edit Self help groups provide people who stutter a shared forum within which they can access resources and support from others facing the same challenges of stuttering Prognosis edit Among ages 3 5 the prognosis for spontaneously recovery is about 65 to 87 5 By 7 years of age or within the first two years of stuttering 33 49 61 and about 74 recover by their early teens In particular girls are shown to recover more often 62 63 Prognosis is guarded with later age of onset children who start stuttering at age 3 years or later 64 and or duration of greater than 6 12 months since onset that is once stuttering has become established about 18 of children who stutter after five years recover spontaneously 65 Stuttering that persists after the age of seven is classified as persistent stuttering and is associated with a much lower chance of recovery 33 Epidemiology editThe lifetime prevalence or the proportion of individuals expected to stutter at one time in their lives is about 5 6 66 and overall males are affected two to five times more often than females 67 68 As seen in children who have just begun stuttering there is an equivalent number of boys and girls who stutter Still the sex ratio appears to widen as children grow among preschoolers boys who stutter outnumber girls who stutter by about a two to one ratio or less 68 This ratio widens to three to one during first grade and five to one during fifth grade 69 as girls have higher recovery rates 62 70 the overall prevalence of stuttering is generally considered to be approximately 1 71 Cross cultural edit Cross cultural studies of stuttering prevalence were very active in early and mid 20th century particularly under the influence of the works of Wendell Johnson who claimed that the onset of stuttering was connected to the cultural expectations and the pressure put on young children by anxious parents which has since been debunked Later studies found that this claim was not supported by the facts so the influence of cultural factors in stuttering research declined It is generally accepted by contemporary scholars that stuttering is present in every culture and in every race although the attitude towards the actual prevalence differs Some believe stuttering occurs in all cultures and races at similar rates about 1 of general population and is about 5 among young children all around the world 26 48 A US based study indicated that there were no racial or ethnic differences in the incidence of stuttering in preschool children 72 64 Different regions of the world are researched unevenly The largest number of studies has been conducted in European countries and in North America where the experts agree on the mean estimate to be about 1 of the general population 73 obsolete source African populations particularly from West Africa might have the highest stuttering prevalence in the world reaching in some populations 5 6 and even over 9 74 Many regions of the world are not researched sufficiently and for some major regions there are no prevalence studies at all 75 Bilingual stuttering edit Identification edit Bilingualism is the ability to speak two languages Many bilingual people have been exposed to more than one language since birth and throughout childhood Since language and culture are relatively fluid factors in a person s understanding and production of language bilingualism may be a feature that impacts speech fluency There are several ways during which stuttering may be noticed in bilingual children including the following The child is mixing vocabulary code mixing from both languages in one sentence This is a normal process that helps the child increase their skills in the weaker language but may trigger a temporary increase in disfluency 76 The child is having difficulty finding the correct word to express ideas resulting in an increase in normal speech disfluency 76 The child is having difficulty using grammatically complex sentences in one or both languages as compared to other children of the same age Also the child may make grammatical mistakes Developing proficiency in both languages may be gradual so development may be uneven between the two languages 76 It was once believed that being bilingual would confuse a child and cause stuttering but research has debunked this myth 77 Stuttering may present differently depending on the languages the individual uses For example morphological and other linguistic differences between languages may make presentation of disfluency appear to be more or less depending on the individual case 78 History edit nbsp Lewis Carroll the well known author ofAlice s Adventures in Wonderland had a stammer as did his siblings Because of the unusual sounding speech that is produced and the behaviors and attitudes that accompany a stutter it has long been a subject of scientific interest and speculation as well as discrimination and ridicule People who stutter can be traced back centuries to Demosthenes who tried to control his disfluency by speaking with pebbles in his mouth 79 The Talmud interprets Bible passages to indicate that Moses also stuttered and that placing a burning coal in his mouth had caused him to be slow and hesitant of speech Exodus 4 v 10 79 Galen s humoral theories were influential in Europe in the Middle Ages for centuries afterward In this theory stuttering was attributed to an imbalance of the four bodily humors yellow bile blood black bile and phlegm Hieronymus Mercurialis writing in the sixteenth century proposed to redress the imbalance by changes in diet reduced libido in men only and purging Believing that fear aggravated stuttering he suggested techniques to overcome this Humoral manipulation continued to be a dominant treatment for stuttering until the eighteenth century 80 Partly due to a perceived lack of intelligence because of his stutter the man who became the Roman emperor Claudius was initially shunned from the public eye and excluded from public office 79 In and around eighteenth and nineteenth century Europe surgical interventions for stuttering were recommended including cutting the tongue with scissors removing a triangular wedge from the posterior tongue and cutting nerves or neck and lip muscles Others recommended shortening the uvula or removing the tonsils All were abandoned due to the danger of bleeding to death and their failure to stop stuttering Less drastically Jean Marc Gaspard Itard placed a small forked golden plate under the tongue in order to support weak muscles 79 nbsp Notker Balbulus from a medieval manuscriptItalian pathologist Giovanni Morgagni attributed stuttering to deviations in the hyoid bone a conclusion he came to via autopsy 80 Blessed Notker of St Gall c 840 912 called Balbulus The Stutterer and described by his biographer as being delicate of body but not of mind stuttering of tongue but not of intellect pushing boldly forward in things Divine was invoked against stammering 81 A royal Briton who stammered was King George VI He went through years of speech therapy most successfully under Australian speech therapist Lionel Logue for his stammer The Academy Award winning film The King s Speech 2010 in which Colin Firth plays George VI tells his story The film is based on an original screenplay by David Seidler who also stuttered until age 16 Another British case was that of Prime Minister Winston Churchill Churchill claimed perhaps not directly discussing himself that s ometimes a slight and not unpleasing stammer or impediment has been of some assistance in securing the attention of the audience 82 However those who knew Churchill and commented on his stutter believed that it was or had been a significant problem for him 83 His secretary Phyllis Moir commented that Winston Churchill was born and grew up with a stutter in her 1941 book I was Winston Churchill s Private Secretary She related one example It s s s simply s s splendid he stuttered as he always did when excited Louis J Alber who helped to arrange a lecture tour of the United States wrote in Volume 55 of The American Mercury 1942 that Churchill struggled to express his feelings but his stutter caught him in the throat and his face turned purple and that born with a stutter and a lisp both caused in large measure by a defect in his palate Churchill was at first seriously hampered in his public speaking It is characteristic of the man s perseverance that despite his staggering handicap he made himself one of the greatest orators of our time For centuries cures such as consistently drinking water from a snail shell for the rest of one s life hitting a stutterer in the face when the weather is cloudy strengthening the tongue as a muscle and various herbal remedies were tried 84 Similarly in the past people subscribed to odd theories about the causes of stuttering such as tickling an infant too much eating improperly during breastfeeding allowing an infant to look in the mirror cutting a child s hair before the child spoke his or her first words having too small a tongue or the work of the devil 84 Society culture and community editIn popular culture edit See also Stuttering in popular culture See also List of stutterers Stuttering community edit Many counties have regular events and activities to get people who stutter together in mutual support These events take place at regional national and international level At a regional level there are often stuttering support or chapter groups that look to provide a place for people who stutter in the local area to meet discuss and learn from each other 85 86 At a national level stuttering charities or groups host conferences Conferences can vary in their focus and scope some focus on the latest research developments some on stuttering and the arts and others still look to provide a space for stutterers simply to come together There are two different international meetings of stutterers The International Stuttering Association World Congress is primarily focused on people who stutter There is also Joint World Congress on Stuttering and Cluttering that brings together academics researchers speech language pathologists people who stutter and people who clutter for a focus more on research viewpoints and treatments for stuttering Historic advocacy and self help edit Self help and advocacy organisations for people who stammer have reportedly been in existence since the 1920s In 1921 a Philadelphia based attorney who stammered J Stanley Smith established the Kingsley Club 87 Designed to support people with a stammer in the Philadelphia area the club took inspiration for its name from Charles Kingsley Kingsley a nineteenth century English social reformer and author of Westward Ho and The Water Babies had a stammer himself 88 Whilst Kingsley himself did not appear to recommend self help or advocacy groups for people who stammer the Kingsley Club promoted a positive mental attitude to support its members in becoming confident speakers in a similar way discussed by Charles Kingsley in Irrationale of Speech Other support groups for people who stammer began to emerge in the first half of the twentieth century In 1935 a Stammerer s Club was established in Melbourne Australia by a Mr H Collin of Thornbury 89 At the time of its formation it had 68 members The club was formed in response to the tragic case of a man from Sydney who sought relief from the effects of stammering in suicide As well as providing self help this club adopted an advocacy role with the intention of appealing to the Government to provide special education and to fund research into the causes of stammering 90 91 Disability rights movement edit Some people who stutter and are part of the disability rights movement have begun to embrace their stuttering voices as an important part of their identity 92 93 In July 2015 the UK Ministry of Defence MOD announced the launch of the Defence Stammering Network to support and champion the interests of British military personnel and MOD civil servants who stammer and to raise awareness of the condition 94 Stuttering pride edit Main article Stuttering pride nbsp The Stuttering Pride flag symbolises the waves of stuttering pride rippling through the community Stuttering pride or stuttering advocacy is a social movement repositioning stuttering as a valuable and respectable way of speaking The movement seeks to counter the societal narratives in which temporal and societal expectations dictate how communication takes place 95 In this sense the stuttering pride movement challenges the pervasive societal narrative of stuttering as a defect and instead positions stuttering as a valuable and respectable way of speaking in its own right The movement encourages stutterers to take pride in their unique speech patterns and in what stuttering can tell us about the world It also advocates for societal adjustments to allow stutterers equal access to education and employment opportunities and addresses how this may impact stuttering therapy 95 Associations editAll India Institute of Speech and Hearing American Institute for Stuttering British Stammering Association European League of Stuttering Associations International Stuttering Association Israel Stuttering Association Michael Palin Centre for Stammering Children National Stuttering Association United States Philippine Stuttering Association Stuttering Foundation of America The Indian Stammering AssociationSee also editAmerican Speech Language Hearing Association Cluttering Developmental dysfluency Dyscravia Fluency International Stuttering Awareness Day Lists of language disorders List of stutterers Monster Study National Stuttering Awareness Week Neurodevelopmental disorder Speech and language impairment Speech disorder Speech disfluency Speech language pathology Speech processing Stuttering in popular culture Stuttering therapyNotes edit a b GREENE JS 1937 07 01 Dysphemia and Dysphonia Cardinal Features of Three Types of Functional Syndrome Stuttering Aphonia and Falsetto Male Archives of Otolaryngology Head amp Neck Surgery 26 1 American Medical Association AMA 74 82 doi 10 1001 archotol 1937 00650020080011 ISSN 0886 4470 World Health Organization ICD 10 F95 8 Stuttering Archived 2014 11 02 at the Wayback Machine Stuttering a b c Tichenor SE Yaruss JS 2019 12 18 Stuttering as Defined by Adults Who Stutter Journal of Speech Language and Hearing Research 62 12 4356 4369 doi 10 1044 2019 JSLHR 19 00137 ISSN 1092 4388 PMID 31830837 S2CID 209340288 a b Carlson N 2013 Human Communication In Physiology of behavior 11th ed pp 497 500 Boston Allyn and Bacon Bowen C Information for Families Stuttering What can be done about it speech language therapy dot com Archived from the original on April 2 2015 Retrieved June 19 2013 Kalinowski amp Saltuklaroglu 2006 p 17harvnb error no target CITEREFKalinowskiSaltuklaroglu2006 help a b Guitar 2005 pp 16 7harvnb error no target CITEREFGuitar2005 help Constantino CD Campbell P Simpson S March April 2022 Stuttering and the social model Journal of Communication Disorders 96 106200 doi 10 1016 j jcomdis 2022 106200 ISSN 0021 9924 PMID 35248920 S2CID 247096437 Sroubek A Kelly M Li X 2013 02 01 Inattentiveness in attention deficit hyperactivity disorder Neuroscience Bulletin 29 1 103 110 doi 10 1007 s12264 012 1295 6 ISSN 1995 8218 PMC 4440572 PMID 23299717 Druker K Hennessey N Mazzucchelli T Beilby J 2019 03 01 Elevated attention deficit hyperactivity disorder symptoms in children who stutter Journal of Fluency Disorders 59 80 90 doi 10 1016 j jfludis 2018 11 002 ISSN 0094 730X PMID 30477807 S2CID 53733731 Donaher J Richels C 2012 12 01 Traits of attention deficit hyperactivity disorder in school age children who stutter Journal of Fluency 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2015 10 06 Retrieved 2015 10 05 How To Stutter More stuttermore tumblr com Archived from the original on 2015 10 29 Retrieved 2015 10 05 Defence Stammering Network launched Archived from the original on 2015 08 25 Retrieved 2015 07 25 a b Stammering pride and prejudice difference not defect Patrick Campbell Christopher Constantino Sam Simpson Albury 2019 ISBN 978 1 907826 36 8 OCLC 1121135480 a href Template Cite book html title Template Cite book cite book a CS1 maint location missing publisher link CS1 maint others link Further reading editListen to this article 3 parts 52 minutes source source source source source source nbsp These audio files were created from a revision of this article dated 16 January 2006 2006 01 16 and do not reflect subsequent edits Audio help More spoken articles nbsp Look up stammering or stuttering in Wiktionary the free dictionary Rockey D Speech Disorder in Nineteenth Century Britain The History of Stuttering Croom Helm London 1980 ISBN 0 85664 809 4Goldmark Daniel Stuttering in American Popular Song 1890 1930 In Lerner N 2006 Sounding Off Theorizing Disability in Music New York London Routledge pp 91 105 ISBN 978 0 415 97906 1 Ward D 2006 Stuttering and Cluttering Frameworks for understanding treatment Hove and New York City Psychology Press ISBN 978 1 84169 334 7 Retrieved from https en wikipedia org w index php title Stuttering amp oldid 1216356758, wikipedia, wiki, book, books, library,

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