Child development

The Early Start Denver Model, Explained

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If your toddler was recently diagnosed, ESDM is one of the names you will hear. It is a comprehensive early-intervention approach built for the youngest children, combining warm, child-led play with structured teaching. Here is what the Early Start Denver Model is, what the evidence actually shows, why it starts so young, and how families reach it through early-intervention services.

Last updated: July 2026

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What is the Early Start Denver Model?

The Early Start Denver Model is a comprehensive early-intervention approach for toddlers and preschoolers with autism. It blends two traditions: developmental, relationship-based methods that follow the child's lead in play, and the teaching principles of applied behavior analysis. The federal overview places approaches like this among the developmental and behavioral interventions used in autism 3.

ESDM was developed by psychologists Sally Rogers and Geraldine Dawson. Rather than drilling skills at a table, it embeds a child's learning goals — communication, imitation, play, social engagement — into ordinary activities and games, so teaching happens inside moments the child is already enjoying. ESDM can be delivered by trained therapists in a clinic or at home, and a version is taught to parents to use in daily life.

What the research shows

ESDM is one of the better-studied early autism interventions. In a landmark randomized trial, 48 toddlers aged 18 to 30 months received either ESDM or referral to community services; after two years, the ESDM group showed significant gains in IQ, adaptive behavior, and, for some children, diagnostic status compared with the community group 1. That two-year trial is a large part of why ESDM is so widely recommended 1.

Honesty matters here too. That study was conducted at a single site with a small sample, and later replications have been more mixed, with some finding smaller or less consistent effects. So the fair reading is that ESDM has real, meaningful evidence behind it — stronger than many autism therapies — while not being a guaranteed outcome for any individual child. It is a well-supported option, not a promise.

Why it starts so young

ESDM targets toddlers because the very young brain is especially changeable, and because autism can be identified early. Research consensus holds that the earliest behavioral signs are often detectable by around 24 months, which is part of the case for acting early on autism rather than adopting a 'wait and see' stance 2. Catching differences in a baby's social attention, gestures, and communication opens a window when intervention may do the most good.

This is why clinicians push against delay. Watching for early signs in babies — reduced eye contact, not responding to their name, few gestures — and starting support promptly is the logic behind ESDM's early age range. The point is not alarm; it is that early, ordinary, play-based support is easier to weave in during the toddler years than to add on later.

How a session actually looks

An ESDM session looks like joyful, purposeful play. The adult follows the child's interest — bubbles, a toy, a song — and turns it into repeated chances to practice a specific goal, like requesting, imitating, or taking turns. Learning targets are planned carefully in the background, but to the child it feels like play with a favorite person, not therapy at a desk.

Behind that warmth is structure. The therapist tracks a detailed set of objectives across communication, social, play, motor, and self-care domains, and uses prompting and reinforcement drawn from applied behavior analysis to build them. A defining feature is the parent role: caregivers are coached to fold the same techniques into meals, baths, and playtime, which multiplies the hours of learning far beyond the formal sessions.

ESDM among the naturalistic developmental behavioral interventions

ESDM belongs to a family of approaches called naturalistic developmental behavioral interventions — methods that teach within natural play and routines rather than through repetitive drills. Others in this family include pivotal response treatment, and they share ESDM's blend of developmental warmth and behavioral technique. Families weighing options often meet these as aba alternatives, though it is more accurate to call ESDM a fusion that includes behavioral principles rather than a rejection of them.

That distinction matters when you read the evidence. Traditional ABA has a mixed research picture — a meta-analysis found gains in some areas such as socialization and communication, with effects on other outcomes not reaching statistical significance 6. ESDM was designed to keep the structured teaching while making it more developmental and child-led. Where a program sits on that spectrum is part of why some families prefer it and others prefer more, or less, behavioral approaches.

How to access ESDM and who pays

For the youngest children, the usual route is early intervention. Under federal law, Part C provides early-intervention services to children from birth to age two with developmental delays or disabilities, delivered in everyday settings 5. Accessing it follows a defined process: a referral, a free evaluation, and — if the child qualifies — an individualized family service plan, or IFSP, built together with you 4. You do not need a completed medical diagnosis to begin.

That Part C early intervention free evaluation is one of the most useful doors available, and cost should not stop a family from knocking on it. Availability of ESDM by name varies by area, because not every program offers it, so it is worth asking your early-intervention program and providers directly. At age three, services transition from Part C to the school system's Part B preschool supports, and planning that handoff early keeps support continuous.

Is ESDM right for my child?

There is no single best therapy for every autistic child, and ESDM is a strong option rather than a required one. It tends to fit families of very young children who want an intensive, play-based, relationship-centered approach and who can take part in the parent-coaching piece. Like any therapy, it works best when chosen with your child's clinicians, matched to your child's profile and your family's real capacity.

ESDM also does not have to stand alone; many toddlers receive it alongside speech and occupational therapy. Judge it the way you would judge any approach — by steady, real progress in your particular child over months, not by a program's reputation or a brochure's claims. And be cautious of anyone promising recovery or a cure; the honest evidence supports meaningful help, not guarantees.

Common questions

ESDM is designed for very young children — toddlers and preschoolers with autism or signs of it. The landmark research trial enrolled children between 18 and 30 months, and the model is generally used across the toddler and early-preschool years. It targets this age because early development is highly changeable and because autism can be identified reliably in the second year of life.

Not quite. ESDM uses teaching principles drawn from applied behavior analysis, but it delivers them through child-led, naturalistic play rather than structured drills at a table. It is often grouped with naturalistic developmental behavioral interventions — a blend of developmental and behavioral methods. So it overlaps with ABA in its techniques while feeling more developmental and relationship-based in practice.

It has real evidence behind it, more than many autism therapies. A randomized trial found that toddlers who received ESDM for two years made gains in IQ and adaptive behavior compared with community services. But that was a single small study, and later research has been more mixed. ESDM is a well-supported option, not a guaranteed result for any individual child.

There is no universal number, and intensity is set individually. The original research model used many hours a week of combined therapist and parent-delivered practice, but real-world programs vary widely based on the child, the family, and what services are available. Much of ESDM's value comes from parents weaving the techniques into everyday routines, which extends learning well beyond formal sessions.

Start by contacting your state's Part C early-intervention program for a referral; the evaluation is free and does not require a finished medical diagnosis. If your child qualifies, you build an IFSP together. Ask specifically whether ESDM or a similar naturalistic developmental approach is offered, since availability varies by area, and plan ahead for the transition to school services at age three.

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Choosing an early intervention safely

  • —Any provider or program that promises recovery, a cure, or a 'normal' child from ESDM or any single therapy
  • —Pressure to stop medical care or other recommended services in favor of one intensive program
  • —A new loss of skills your child had before — words, eye contact, play — that is appearing or getting worse
  • —A first seizure, such as staring spells, stiffening, or shaking, or new self-injury

A first seizure or a medical emergency needs 911 or an emergency room; a new loss of skills should be raised promptly with your pediatrician.

This article is general education, not medical advice or an endorsement of any specific therapy or provider. Decisions about your child's care should be made with clinicians who know your child.

References

  1. 1.Dawson G, Rogers S, Munson J, et al. (2010). Randomized, Controlled Trial of an Intervention for Toddlers With Autism: The Early Start Denver Model. Pediatrics. doi:10.1542/peds.2009-0958 ✓That a randomized trial of 48 toddlers (18-30 months) found ESDM produced gains in IQ, adaptive behavior, and diagnostic status versus community intervention over two years.
  2. 2.Zwaigenbaum L, Bauman ML, Stone WL, et al. (2015). Early Identification of Autism Spectrum Disorder: Recommendations for Practice and Research. Pediatrics (Supplement). doi:10.1542/peds.2014-3667C ✓That the earliest behavioral signs of autism are often detectable by around 24 months and that acting early is preferable to a wait-and-see approach.
  3. 3.Eunice Kennedy Shriver National Institute of Child Health and Human Development (2021). What are the treatments for autism?. NICHD (NIH). link ✓That autism interventions fall into developmental and behavioral categories and that early intervention can improve outcomes; used to place ESDM among them.
  4. 4.Center for Parent Information and Resources (OSEP-funded) (2023). Part C of IDEA: Early Intervention for Babies and Toddlers. Center for Parent Information and Resources. link ✓That families access Part C early intervention through referral, a free evaluation, and an individualized family service plan (IFSP).
  5. 5.U.S. Department of Education (2024). IDEA Early Intervention Program for Infants and Toddlers with Disabilities (Part C). U.S. Department of Education. link ✓That IDEA Part C provides early-intervention services to children from birth to age two with disabilities or developmental delay, in natural environments.
  6. 6.Yu Q, Li E, Li L, Liang W (2020). Efficacy of Interventions Based on Applied Behavior Analysis for Autism Spectrum Disorder: A Meta-Analysis. Psychiatry Investigation. PMID 32375461 ✓That ABA-based intervention improved some outcomes (socialization, communication) while effects on others were not statistically significant; used to contextualize ESDM's behavioral component.

6 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — every citation independently verified. Editorial policy

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