Stammering, or stuttering, the terms are interchangeable, affects around 5% of children at some point, most commonly between the ages of 2 and 5. For most, it resolves naturally. For some, it persists into adulthood. The challenge for parents is knowing which group their child is in, and what to do.
This article explains what stammering actually is, what causes it, when to seek help, and what therapy involves.
Key takeaways
Stammering affects around 5% of pre-school children at some point
Around 75-80% recover naturally, often within 1-2 years
Early therapy is highly effective and reduces the risk of persistence
Stammering is not caused by parenting, anxiety, or trauma
Modern therapy approaches can help children speak more fluently or speak with confidence even when they stammer
What stammering looks like
Stammering can show up in different ways:
Repetitions: "I-I-I want", "ba-ba-ball"
Prolongations: "ssssseven"
Blocks: silence where the word seems stuck before it comes out
Physical tension: eye blinking, jaw tightening, breathing irregularities during speech
Avoidance: substituting easier words, refusing to speak
Children often go through periods of more and less fluency. This is normal. What matters is the overall pattern over weeks and months.
Normal disfluency vs stammering
All children have moments of disfluency, especially between ages 2 and 4. Distinguishing typical disfluency from stammering:
Likely normal:
Whole-word repetitions ("I I I want")
Phrase repetitions ("Can I, can I have")
Brief, infrequent
No physical tension
Child seems unaware
Likely stammering:
Sound or syllable repetitions ("b-b-ball")
Prolongations of sounds
Blocks where speech gets stuck
Frequent (in most utterances)
Physical tension visible
Child may show frustration or awareness
If you're unsure, an SLT assessment can clarify.
What causes stammering?
The honest answer: we know more than we used to, but not everything.
What we know:
Genetic component: stammering runs in families. Around 60% of people who stammer have a family member who does too.
Neurological differences: brain imaging shows subtle differences in how language and motor planning regions communicate in people who stammer.
Onset typically 2-5 years: when language is developing rapidly.
What it's NOT caused by:
Parenting style or family environment
Anxiety (although anxiety can make stammering harder; it doesn't cause it)
Trauma or stress (though these can sometimes coincide with onset)
Bilingual upbringing
Imitation of other people who stammer
Watching too much screen time
If you're a parent of a child who stammers and you've been blaming yourself, please stop. The science is clear: this isn't your fault.
Predicting who recovers naturally
Research has identified some factors that suggest higher likelihood of natural recovery:
Female (girls recover more often than boys, though both can)
Stammering for less than 12 months
No family history of persistent stammering
Mild or fluctuating severity
Child shows little awareness or frustration
Factors that suggest higher risk of persistence:
Male
Stammering for more than 12 months
Family history of stammering that persisted
Severe disfluency
Visible physical tension or struggle
Onset after age 4
These are guidelines, not certainties. Individual children vary widely.
When should you seek help?
The advice has shifted significantly over the past decade. Older guidance was to "wait and see." Current evidence supports earlier intervention.
Speak to a speech and language therapist if:
Stammering has been present for more than 6-12 months
The stammering is moderate to severe
Your child is showing frustration or awareness
There's family history of persistent stammering
The pattern includes blocks, prolongations, or physical tension
You're worried, that's reason enough
Early therapy when needed has a strong evidence base for preventing persistence.
What therapy looks like
Several evidence-based approaches exist:
The Lidcombe Programme: for children typically 3-6 years old. The parent provides specific positive feedback during play sessions at home, guided by the therapist. Strong evidence base, particularly for younger children. Adapts well to online delivery.
Restart-DCM (Demands and Capacities Model): focuses on adjusting the child's environment to reduce demands on developing fluency. Often combined with direct therapy.
Camperdown Programme: for older children and adults. Teaches a smooth, slightly slowed speech pattern.
Acceptance and self-confidence approaches: for older children and adults, focusing on speaking confidently regardless of fluency. Particularly helpful for teenagers.
The right approach depends on age, severity, child's personality, and family circumstances. A specialist SLT will recommend.
Online therapy for stammering
Stammering therapy translates very well to online delivery. The work is largely verbal, talking, practising, and guided feedback, which doesn't lose anything online.
For programmes like Lidcombe that involve parent-led home practice, online therapy actually tends to fit naturally because the therapist coaches the parent in their actual home setting.
What you can do at home
Whether or not your child is in therapy:
Helpful:
Slow your own speech rate
Pause more between sentences
Reduce questions, increase comments
Make eye contact when your child speaks
Wait until they finish before responding
Let them complete their words without finishing for them
Less helpful:
Telling them to "slow down" or "take a breath"
Finishing their sentences
Showing frustration or sympathy in your face
Discussing the stammer constantly
Avoiding talking about it entirely if your child wants to discuss it
The goal is a relaxed communication environment where your child doesn't feel rushed.
When stammering persists
Around 20-25% of children who stammer continue to do so into adulthood. This isn't a failure of therapy, for some, the underlying neurological difference doesn't change, and the goal shifts.
The good news: adults who stammer can lead full, successful lives. Many become confident, accomplished communicators. Sometimes more effective than fluent speakers because they've thought hard about communication. Some choose to continue speaking openly with their stammer rather than hide it.
Source
https://stamma.org/This article is based on current peer-reviewed research and clinical guidelines. It is intended for informational purposes and does not replace professional clinical advice.