Developing communication in children with Down syndrome:
practical guide for families and caregivers
Understanding the communicational specificities of Down syndrome, learning language development strategies, and discovering tools that transform each interaction into a learning opportunity
Communication is the area in which individuals with Down syndrome progress most spectacularly with appropriate support — and in which families and professionals can have the most impact. Between ages 0 and 10 in particular, each well-conducted interaction is a building block of language development. This guide presents the most effective strategies for developing communication in your child with Down syndrome — and the DYNSEO training that teaches them to you comprehensively.
1. The communicational specificities of Down syndrome: what you need to know
💬 The "understanding/expression dissociation" — the fundamental principle
In Down syndrome, understanding language always develops ahead of expression. A child with Down syndrome often understands much more than they can say. This reality has a major practical implication: never adapt the richness of conversations and interactions to what the child can express — but to what they can understand. Speak to your child as if they understand more than they show.
1.1 The specific challenges of language development
Articulatory difficulties and reduced intelligibility
Hypotonia (reduced muscle tone) of the oro-facial muscles, a relatively large tongue compared to the oral cavity, and speech motor coordination disorders — all factors that make speech less intelligible, especially outside the close circle. This is not a lack of language but a motor production disorder of speech.
Reduced verbal working memory
Verbal working memory — which temporarily stores sound information during processing — is particularly affected in Down syndrome. Direct consequence: long sentences, multiple instructions, and complex verbal sequences are difficult to retain. Use short, repeated instructions associated with visual supports.
Extended processing time
A child with Down syndrome needs more time to process auditory information and formulate their response. This delay — 10 to 20 seconds is common — is neurological, not behavioral. Do not fill the silence, do not repeat the question, do not suggest the answer. Wait.
2. Strategies for developing communication in daily life
Create communication opportunities
Do not anticipate all of the child's needs. Sometimes, wait for them to express a desire rather than satisfying it before they formulate it. "Do you want water?" (while showing two glasses) is better than automatically giving water. Every request is a language learning opportunity.
Use expansive reformulation
The child says "lolo" — you respond "yes, the lolo, you want milk!" You do not correct, you enrich. This technique of expansive reformulation is one of the most documented for stimulating language acquisition in Down syndrome.
Systematically associate gesture and speech
The visual channel is the strong point of Down syndrome. Signing important words at the same time as pronouncing them (simplified Makaton or personalized gestures) doubles the mnemonic anchoring and facilitates access to vocabulary.
Create a personalized illustrated word book
A book with important words from the child's life — illustrated with real photos of THEIR environment (their home, their toys, their loved ones) — is a more effective lexical development tool than any generic book.
Read together every day
15 minutes of shared daily reading — where the child actively participates (pointing at images, completing repetitive phrases, turning pages) — is one of the most powerful activities for vocabulary development and narrative understanding.
Developing communication in children with Down syndrome
Online training at your own pace for families and professionals. Master the specific mechanisms of language development in Down syndrome, learn daily stimulation strategies, and discover AAC tools and concrete activities for each stage of development.
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3. When to introduce AAC and how
📱 AAC does not replace speech — it develops it
A persistent myth suggests that introducing Augmentative and Alternative Communication (pictograms, signs, applications) hinders the development of spoken language. Studies are clear: it is the opposite. AAC develops speech in children with Down syndrome — it gives them words before speech is available, and these words gradually become spoken. The MON DICO DYNSEO application is the reference digital tool for AAC in children with Down syndrome.
Simplified Makaton: Even without formal training in Makaton, associating simple and consistent gestures with the 20-30 most frequent words in your child's daily life (eat, drink, sleep, play, more, no, yes) has a measurable impact on language acquisition. Start with 5 gestures and gradually add more.
4. DYNSEO Resources
📚 DYNSEO Resources — Communication and Down syndrome
MON DICO Application
MON DICO is the reference digital AAC tool for children with Down syndrome — customizable pictograms, adapted interface.
COCO Application
COCO enhances vocabulary and cognitive skills of children with Down syndrome aged 5-10 in a playful setting.
CLINT Application
CLINT for teenagers and adults with Down syndrome — age-appropriate cognitive development.
Cognitive tests
The DYNSEO cognitive tests allow tracking the development of language skills in Down syndrome.
“My son was 4 years old and had very few words. After the DYNSEO training and the introduction of MON DICO, in 6 months he doubled his active vocabulary. AAC did not prevent him from speaking — on the contrary.”
— Father of a 5-year-old child with Down syndromeEvery word learned is a door opened to the world
Developing communication in a child with Down syndrome is the greatest gift you can give them — because communication is the link with others, participation in social life, and expression of their unique personality. The DYNSEO training gives you the tools to be an active participant in this development every day.
Access the Qualiopi training →FAQ — Developing Communication in Down Syndrome
At what age should language stimulation begin for a child with Down syndrome?
From birth — well before the first words. Early interactions (eye contact, reciprocal vocalizations, reading aloud from the first months, constant language exposure) build the neurological foundations of language. Speech therapy can begin as early as 6-12 months to prepare oro-motor functions and stimulate pre-verbal communication. The earlier the work begins, the better the long-term trajectories.
My 7-year-old child with Down syndrome still doesn't speak — is this normal?
A lack of functional speech at 7 years old in Down syndrome is unusual but possible, especially in the presence of significant oro-facial motor disorders or comorbidities. In this case, a thorough evaluation by a specialized speech therapist and an audiologist is essential (hearing problems, common in Down syndrome, may go unnoticed). AAC should be fully developed in the meantime — not as a definitive substitute for speech, but as a bridge to it.
Is the adapted DYNSEO communication sheet different from the communication training?
Yes — the adapted Down syndrome communication sheet from DYNSEO is a short, free reference document that summarizes the adaptation principles for all adults in the environment. The training "Developing Communication in Children with Down Syndrome" is a comprehensive course that goes much further: mechanisms of language development in Down syndrome, step-by-step intervention strategies, introduction to AAC, concrete activities with demonstrations. Both are complementary.
How to coordinate communication strategies between the speech therapist, school, and home?
Consistency across all contexts is the most important factor for effectiveness. Strategies: use the same AAC vocabulary (same pictograms, same gestures) in all contexts; keep a communication notebook that circulates between home and school with new words worked on in sessions; organize a quarterly synthesis meeting bringing together parents, speech therapist, teacher, and AVS/AESH; and designate a "coordinator" (often the speech therapist) who maintains consistency among all stakeholders.
Do children with Down syndrome always develop reading and writing skills?
The majority of children with Down syndrome learn to read with adapted teaching — often through a global approach rather than a phonetic one. Writing is more variable depending on fine motor skills. Reading is particularly valuable as it bypasses verbal memory difficulties (visually memorizing words) and significantly enhances vocabulary. Specific early reading programs for Down syndrome (such as those developed by the Jérôme Lejeune Foundation) have shown excellent results.
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