ADHD and Stuttering, Autism and Other Conditions

ADHD and stuttering occur together more often than chance would predict, and so do stuttering and autism, speech sound difficulties and language difficulties. Having both does not mean one caused the other, and it does not stop a child from being treated for the stutter: it changes how treatment is planned.

This guide takes each pairing on its own, says how strong the research is, and ends with the question most parents bring: what do we work on first?

Pairing	What research shows	How strong the evidence is
ADHD and stuttering	ADHD and ADHD symptoms are more common in children who stutter, and may mean treatment takes longer	Large surveys and studies, plus Australian research
Autism and stuttering	Stuttering is more common in autistic children, and some disfluencies look different	Survey data and small studies
Apraxia and stuttering	The two can occur together and are easy to confuse	Very little research
Speech sound or language difficulty and stuttering	Common together; both can be treated at the same time	Small Australian treatment studies
Two languages and stuttering	Speaking two languages does not appear to raise the risk of persistent stuttering	Reviews of mixed studies

Do ADHD and stuttering go together?

Yes. In a United States health survey of more than 62,000 children, children who stutter had about three times the odds of an ADHD diagnosis compared with children who do not stutter (Briley and Ellis, 2018). A 2025 study of 204 children and teenagers who stutter found that 17.2% had an ADHD diagnosis reported by their parents. Over 40% of the rest had symptom scores high enough to warrant a closer look (Walsh and colleagues).

Australian research found the same pattern earlier in childhood. In a study of 185 preschool children who stutter, half had elevated ADHD symptoms, and those children needed about 25% more clinical time to reach their fluency goals (Druker and colleagues, 2019).

Two points help keep this in proportion. ADHD symptoms in the 2025 study were not linked to how severe the stutter was, although inattention was modestly linked to how much stuttering affected the child. And none of this research shows that ADHD causes stuttering. The guide to what causes stuttering covers what does.

How is stuttering treatment adjusted for a child with ADHD?

Treatment for stuttering stays the same in substance; the speech pathologist changes how it is run. Most early stuttering treatment, including the Lidcombe Program, includes short, regular practice at home, where a parent notices and comments on smooth speech in the way the speech pathologist has shown them. Attention, impulsivity and a busy household make that routine harder to keep.

The same Australian research group tested adding parent support for self-regulation to standard stuttering treatment for preschool children with elevated ADHD symptoms. In that trial of 76 children, the group that had the added support reduced stuttering more and needed less treatment time than the group without it (Druker and colleagues, 2020). It is one trial, but it points to the support around the home practice as a place the speech pathologist can adjust.

Fast, jumbled speech in a child with ADHD is sometimes cluttering rather than stuttering, or both. The guide to cluttering explains the difference.

Is stuttering common in autistic children?

Stuttering is more common in autistic children (children with autism spectrum disorder, or ASD) than in other children. In the same national survey, children who stutter had about five times the odds of an autism diagnosis (Briley and Ellis, 2018). The research on treatment is thin: studies of autistic children who stutter are small, and no large trial has tested a stuttering treatment in this group.

With so little research, treatment for an autistic child who stutters has to be fitted to the child rather than lifted from a trial: how they communicate, what holds their attention and how much the stutter bothers them. Dr Lauren Crumlish works with autistic children as well as children who stutter, so both sides are looked at together.

What are atypical disfluencies?

Atypical disfluencies are breaks in speech that do not follow the usual pattern of stuttering. The most studied are word-final disfluencies, where the end of a word repeats or stretches (“ball-all-all”), rather than the start. Typical stuttering happens at the beginning of words and sentences.

In a small study of 11 school-aged autistic children, word-final disfluencies were common. Four of the children also met common criteria for a fluency disorder (Scaler Scott and colleagues, 2014). Atypical disfluencies are not a reason to worry on their own, but they are a reason for an assessment by someone who looks at the whole pattern.

Can a child have apraxia and stutter?

Yes, a child can have childhood apraxia of speech and also stutter, but there is very little research on the two together. Childhood apraxia of speech is a difficulty planning the movements for speech, which shows as inconsistent errors, groping for sounds and choppy rhythm. Some of that can look like stuttering to a parent, and ASHA notes there are still no validated features that reliably separate apraxia from other speech sound disorders.

So the honest answer is that assessment does the sorting. A speech pathologist listens for what stuttering looks like (repeated sounds, stretched sounds and blocks, often with effort) and for what apraxia looks like, and decides whether one, the other or both are present. Dr Lauren works with children who have apraxia and with children who stutter.

Can a child stutter and have a speech sound or language difficulty?

Yes, and it is common. ASHA lists speech sound and language difficulties among the conditions that often occur with stuttering, and notes that a co-occurring speech or language difficulty is one of the factors linked with stuttering that persists.

Not every break in a child’s speech is stuttering. Children with a language delay, or who are searching for words, tend to add fillers (“um”, “like”) and repeat phrases while they plan. Those disfluencies usually come without the stretched sounds, blocks and physical effort of a stutter. Telling the two apart is part of any assessment.

Australian researchers have tested treating stuttering and a speech sound disorder at the same time. In a case series of five preschool children who had the Lidcombe Program alongside treatment for their speech sounds, the children improved in both (Unicomb and colleagues, 2017). A later follow-up suggested these children may be more prone to the stutter returning, so check-ins over time matter.

Does speaking two languages cause stuttering?

Research does not show that it does. Being bilingual does not appear to cause stuttering, and research suggests persistent stuttering is not more common in children who speak more than one language. ASHA’s summary of the research makes four points a family can use:

A child who stutters usually stutters in every language they speak.
Learning a new language can bring a temporary rise in disfluencies. The American Speech-Language-Hearing Association (ASHA) also cautions that stuttering can be over-identified in children who speak more than one language, because normal disfluencies while switching languages can look like stuttering.
Assessment looks at each language the child uses, with an interpreter where the clinician and child do not share a language.
Treatment outcomes for multilingual children do not appear to differ from those of children who speak one language, and gains can carry over to a language that was not treated.

Nothing in this research suggests a family should stop using its home language.

What do we work on first?

Start with an assessment that looks at everything, not with therapy for one part. Treating the stutter while an apraxia goes unnoticed, or the reverse, loses time that matters most when a child is young.

After that, the order is a decision made for each child, and it rests on three questions:

What gets in the way of talking most right now? If people cannot understand your child, that is pressing. If your child understands and is understood but is stuck on words and starting to avoid talking, the stutter is.
How old is your child? The evidence for stuttering treatment is strongest before age 6, so a preschool child’s stutter is not usually left to wait behind other work.
Can the family carry two lots of practice? The Australian studies show stuttering and speech sound treatment can run side by side. Where home practice for two is too much, one is chosen to lead.

Clinicians have traditionally treated these one after the other, often stuttering first; the newer research adds a second option.

Getting help for both

A stuttering assessment is the first step: it measures the stutter, looks at speech and language around it, and asks about any other diagnosis your child has. Dr Lauren Crumlish (PhD) is a Certified Practising Speech Pathologist who works by video, Australia wide, with children and teenagers who stutter. She also works with autistic children, speech sound and language difficulties and childhood apraxia of speech. A parent or guardian can apply to work with Dr Lauren.