ABA, ESDM, Floortime, TEACCH and PECS: the main autism approaches compared

After a diagnosis, families in India can hear a string of names in a single week: ABA from one centre, Floortime from another, ESDM from a doctor, PECS from a speech therapist, TEACCH from a special school. They can sound like rival brands. In fact some are full programmes, some are teaching methods, and some are tools that sit inside other programmes.

It helps to sort them by where they come from. Behavioural approaches grew out of applied behaviour analysis. Developmental and relationship-based approaches grew out of child development and the bond between parent and child. Structured teaching grew out of special education. And a newer family, called naturalistic developmental behavioural interventions (NDBIs), deliberately blends behavioural and developmental methods.

Applied behaviour analysis looks at what happens before a behaviour and after it, and uses that to teach skills and reduce behaviours that get in the way. Goals are written in measurable terms, progress is recorded, and the plan changes when the data shows something is not working. Reinforcement, following a skill with something the child values, is central.

ABA covers a range of styles. At one end is discrete trial training: short, repeated teaching turns, often at a table. At the other is teaching inside play and everyday routines, following the child's interests. Many programmes today use both. The criticism of older, compliance-focused ABA, and how contemporary practice responds, is covered in is ABA therapy harmful?

Naturalistic developmental behavioural interventions combine ABA with developmental science. They teach in natural settings, share control of the activity between child and adult, and use natural rewards: the bubbles keep coming because the child asked for more bubbles, not because they earned a sticker.

• The Early Start Denver Model (ESDM) is a comprehensive early programme for young autistic children, covering communication, cognitive, motor and adaptive skills, delivered through play and everyday routines, often with parents closely involved.
• Pivotal response treatment (PRT) uses activities the child chooses and natural reinforcement to target 'pivotal' skills, such as motivation, that make many other skills easier to learn. Parents are often taught to use it in daily routines.
• JASPER is a focused intervention on joint attention, play, engagement and regulation, rather than a whole programme.

Because these approaches rest partly on behavioural principles, a play-based ABA session and an NDBI session can look much alike. What you see in the room tells you more than the name on the brochure.

The other names families most often meet come from different traditions, and two of them are tools rather than full programmes.

• DIR/Floortime is a relationship-based approach. The adult gets down to the child's level, joins their play and follows their interests, building back-and-forth interaction and emotional connection.
• SCERTS (Social Communication, Emotional Regulation, Transactional Support) is an educational framework rather than a single technique, planned around those three areas. Some researchers class it as an NDBI.
• TEACCH, founded at the University of North Carolina in 1972, is structured teaching. It organises the child's surroundings so they make sense, using visual schedules and work systems: organised tasks that show the child what to do and when they are finished.
• PECS, the Picture Exchange Communication System, was created in 1985 and is based on behavioural principles, so it is behavioural in origin. A child learns to hand a picture to a person to ask for something, and builds from single pictures towards short picture sentences. It is usually set up with the child's speech-language pathologist.

Floortime and SCERTS tend to appeal to families who want a relationship-first approach. TEACCH-style visual structure and PECS can sit alongside almost any other approach, at home, at school and in therapy.

The table summarises what each approach emphasises and what you might see in a session. It is a simplification: practitioners vary, and many borrow from more than one tradition.

The labels matter less than the skill of the person delivering the approach and how well it fits your child.

No approach has been shown to be best for every autistic child. A large 2023 review of autism intervention research, Project AIM, published in the BMJ, pooled 252 studies. It found some support from trials for behavioural, developmental and NDBI approaches, but the effects shrank when only the outcomes at low risk of bias were counted, and adverse events were poorly monitored. The guide to what the evidence on ABA says looks at this in more detail.

Indian professional bodies have written guidance too. The Indian Academy of Pediatrics' 2017 consensus statement names ABA as a behavioural model, calls ESDM and TEACCH effective, stresses parent involvement and advises against unproven alternative therapies. The Indian Psychiatric Society's 2019 guidelines call ABA 'probably the most widely used intervention', also cover Floortime, TEACCH and PECS, and warn against treatments such as stem cells and chelation.

In plain terms: several approaches have some support, none is a guaranteed winner, and you should be very wary of anyone selling a cure. Stem cell treatment, chelation and similar offers are not among the options this guidance supports.

Combining is common and often sensible. A child might have an ABA or NDBI programme, use PECS set up by their speech-language pathologist, and follow a TEACCH-style visual schedule at home and school. What matters is that the pieces fit: one communication system, one way of responding to difficult behaviour, and goals the whole team knows.

When choosing, start with your child and your family rather than the label:

• Age: ESDM is designed for young children; older children and teenagers need approaches that suit their age and give them a say in their goals.
• Communication: a child who does not yet speak needs a way to communicate now, whether pictures, signs or a device, whatever else you choose.
• What your child enjoys: a child who loves movement, routine or particular toys can be taught through them in almost any approach.
• Your family's time and energy: parent-led approaches need an adult who can practise daily, so be honest about what your household can sustain.
• Language: can the practitioner work in the languages your child hears at home, whether English with Hindi, Tamil, Bengali or another language?
• Who is actually available: a well-trained practitioner near you may serve your child better than a long commute across the city for a particular name.
• Training: ask what training the practitioner has in the approach and, for ABA, who the supervising behaviour analyst is and whether the credential can be checked on a public registry.

Your developmental paediatrician or psychologist can help you weigh these. It is reasonable to try an approach for an agreed period and then review it against goals you set together.

Special Minds provides ABA therapy in India, with every programme designed and supervised by a Board Certified Behavior Analyst and goals written with your family. We do not provide speech therapy, occupational therapy or diagnosis, so tools such as PECS are best set up with your child's speech-language pathologist and then carried into the ABA programme. See our ABA therapy guide for families, or ABA therapy for toddlers if your child is very young.