Play-Based vs. Structured: What ABA Therapy for Toddlers Really Looks Like
Ask a two-year-old to sit at a table and point to the red block, and you may get a hard no. Roll a toy truck across the floor and pause, and the same child might reach, look up, and babble for more. That small difference sits at the center of how ABA therapy for toddlers is designed.
ABA therapy for toddlers is applied behavior analysis adapted for children roughly 1 to 3 years old. It builds early skills such as communication, imitation, play, and joint attention, using methods that range from structured, adult-led teaching to play-based models like the Early Start Denver Model (ESDM). ESDM is not an alternative to ABA. It is a play-based form of ABA built for toddlers. So families are rarely choosing between two separate therapies. The real decision is the balance of play-based and structured teaching inside one program, and well-designed toddler ABA programs set that balance around each child's goals.
What ABA Therapy for Toddlers Looks Like Today
Applied behavior analysis studies how behavior changes in response to what happens before and after it. The CDC's treatment overview notes that behavioral approaches have the most evidence for treating autism symptoms. It names two ABA teaching styles: discrete trial training (DTT) and pivotal response training (PRT).
Both sit under the same umbrella. They differ in how teaching is arranged.
- Discrete trial training breaks a skill into small steps. The adult gives a clear instruction, the child responds, and a correct response earns a reward. Trials repeat in quick succession.
- Naturalistic teaching follows the child's interest. Learning happens during play, snack, or bath time, and the reward is usually the activity itself.
For toddlers, that choice carries weight. Children this age have short attention spans, learn largely through imitation, and are still laying the groundwork for language. ABA therapy for toddlers targets that groundwork: following a pointing finger, copying actions, requesting with words or gestures, and taking turns.
Timing plays a part too. The American Academy of Pediatrics recommends autism-specific screening at the 18- and 24-month checkups, so many children begin ABA therapy for toddlers within months of those visits.
Many families start looking into ABA after noticing early red flags, such as few words, limited eye contact, or not responding to their name. Those early concerns usually become the first goals in a toddler program.
Early Intensive Behavioral Intervention vs. Play-Based ABA Therapy
Early intensive behavioral intervention (EIBI) and play-based ABA therapy sit at opposite ends of the toddler ABA spectrum. Both use reinforcement, data collection, and individualized goals. Their day-to-day feel is very different.
EIBI: structured and high-intensity. EIBI traces back to the 1987 Lovaas study, which used discrete trial training for many hours each week. A later randomized trial delivered DTT-based intervention for 25 to 40 hours a week for more than two years. Sessions are adult-led, often at a table, and skills are taught in a planned sequence.
Play-based ABA: naturalistic and child-led. In 2015, a group of leading autism researchers, including ESDM co-creators Geraldine Dawson and Sally Rogers, published a consensus paper that grouped play-based ABA models under one name: Naturalistic Developmental Behavioral Interventions, or NDBIs. According to the authors, NDBIs:
- take place in natural settings
- share control between child and adult
- use natural rewards
- teach skills in developmental order
The Early Start Denver Model is the best-known NDBI built specifically for toddlers, designed by Rogers and Dawson for children 12 to 48 months old. Pivotal response training is another NDBI that many ABA programs already use.
Same goal, two setups. The difference is easiest to see in a single target, like teaching the word "cup." In a structured trial, the therapist holds up a cup, says "Say cup," and delivers praise or a small reward for a correct answer. The trial repeats several times in a row. In a naturalistic version, the cup holds juice the toddler wants. The therapist waits for an attempt to ask, and the juice itself is the reward. The target word is identical. The setup is not.
| EIBI (structured ABA) | ESDM and other NDBIs (play-based ABA) | |
|---|---|---|
| Who leads | The adult | Shared between child and adult |
| Typical setting | Table or defined workspace | Floor, home routines, play areas |
| Reward | Often separate from the task (praise, token, snack) | Built into the activity |
| Skill order | Skill-by-skill curriculum | Developmental sequence |
| Hours in key trials | 25 to 40 per week | About 15 per week from therapists in the 2010 ESDM trial |
| Parent role | Varies by program | Caregiver coaching built into the model |
What the NDBI and EIBI Research Actually Shows
Both ends of the ABA therapy for toddlers spectrum have research behind them. The evidence differs in strength and in which skills improve.
ESDM. The first randomized controlled trial of ESDM, published in Pediatrics in 2010, enrolled 48 toddlers diagnosed between 18 and 30 months. After two years, the ESDM group's cognitive scores rose by an average of 17.6 points, compared with 7.0 points in the community-care group. The ESDM group also kept pace on adaptive behavior, while the comparison group fell further behind. Children received about 15 hours a week from therapists, and parents reported using ESDM strategies for roughly 16 hours a week at home.
EIBI. A 2018 Cochrane systematic review found five studies, with 219 children, comparing EIBI to standard special education. It reported weak evidence that EIBI improved adaptive behavior, IQ, and language after about two years. No differences were found in autism symptom severity or problem behavior. Only one of the five studies randomly assigned children to groups.
Across approaches. The largest comparison to date is the Project AIM meta-analysis, published in The BMJ in 2023 by Micheal Sandbank and colleagues. It found that:
- behavioral interventions improved social-emotional and challenging behavior outcomes, but not social communication
- developmental interventions improved social communication
- NDBIs showed positive effects on adaptive behavior, language, play, and social communication
The same review noted that many studies in the field are low quality and called for more rigorous trials.
Taken together, these studies do not name a single winner. They show that structured and play-based teaching tend to move different skills, that results vary with study quality, and that parent involvement was a built-in ingredient in the strongest ESDM results. In the 2010 trial, parents' reported weekly use of ESDM strategies at home roughly matched the hours delivered by therapists.
One Toddler, Two Teaching Styles: A Real-World Scenario
The example below is a composite based on how blended programs of ABA therapy for toddlers commonly run. It does not describe a specific child.
Eli is 28 months old. He uses a handful of words, rarely turns when his name is called, and spends long stretches spinning the wheels on toy cars. His BCBA designs a program with two parts.
Most of the week is play-based. A therapist sits on the floor with Eli and the cars. She holds a car for a beat before handing it over, waiting for a look, a reach, or a sound. Each attempt earns the car. Over several weeks, the pauses turn into eye contact paired with the word "car." The same routine moves into bath time and snack, where his parents practice it through caregiver coaching sessions.
A smaller slice is structured. Handwashing ends in tears before every meal. That skill is broken into steps and taught with short, repeated practice, using prompts that fade as Eli succeeds.
Neither half replaces the other. Play-based teaching builds social communication. Structured teaching builds a self-care routine. That split mirrors the Project AIM findings, where each approach showed effects in different skill areas.
Questions that reveal a provider's approach. The AAP clinical report on autism calls for shared decision-making, meaning families help choose interventions alongside their child's care team. When vetting an ABA provider, these questions show where a program falls on the spectrum:
- What share of sessions happens on the floor versus at a table?
- Who chooses the activities, the child or the therapist?
- Are any clinicians formally trained in ESDM or another NDBI?
- How are parents coached to use strategies between sessions?
- How was the weekly hour recommendation decided?
That last question carries more weight than it seems. A 2024 JAMA Pediatrics meta-analysis of 144 studies and more than 9,000 children found no evidence that more intervention hours led to better outcomes. Its authors recommended an amount that is developmentally appropriate for the child and supportive of the family. For families in Colorado, Nevada, Nebraska, and Ohio weighing full-time ABA schedules for a toddler, that finding is worth raising directly with the care team.
Structured or play-based is less of a fork in the road than it first appears. Both are ABA. Both have research behind them. The differences live in the details: who leads, where teaching happens, and how many hours fill the week.
If your toddler lights up during floor play but shuts down at the table, or the reverse, that pattern is useful information for building a plan. Walk us through a typical day with your child, from breakfast to bedtime, and we will map out how much play-based and structured teaching would suit your toddler's goals. Connect with our clinical team and let's build that mix together.
Frequently Asked Questions
What is ABA therapy for toddlers?
ABA therapy for toddlers is applied behavior analysis adapted for children about 1 to 3 years old. It teaches communication, play, and daily skills through structured and play-based methods.
Is ESDM the same as ABA?
ESDM is a form of ABA. It uses behavioral teaching inside play and daily routines.
What is the difference between EIBI and ESDM?
EIBI is usually adult-led and structured, often at a table. ESDM is play-based, shares control with the child, and builds in parent coaching.
What age can a toddler start ABA therapy?
There is no set minimum age. ESDM was designed for children as young as 12 months.
How many hours of ABA does a toddler need?
There is no single number. A 2024 meta-analysis found that more hours did not reliably lead to better outcomes.
Is play-based ABA therapy effective?
Research on play-based models, known as NDBIs, shows positive effects on language, play, social communication, and adaptive behavior.
Sources:
- https://www.cdc.gov/autism/treatment/index.html
- https://pubmed.ncbi.nlm.nih.gov/10934569/
- https://pubmed.ncbi.nlm.nih.gov/25737021/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC4951085/
- https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD009260.pub3/
- https://www.bmj.com/content/383/bmj-2023-076733
- https://pubmed.ncbi.nlm.nih.gov/31843864/
- https://doi.org/10.1001/jamapediatrics.2024.1832
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