PDA and speech therapy: why traditional therapy backfires (and what works instead)

If your kid has been described as having a PDA profile — Persistent Drive for Autonomy (previously called Pathological Demand Avoidance) — you’ve probably already discovered that most therapy models don’t fit. The behaviour charts make things worse. The reward systems collapse. The “first/then” structures get refused. The well-meaning speech therapist who prepared a 30-minute structured session gets met with a kid who won’t enter the room.

This is the long version of the conversation we have most weeks with PDA families. It’s written for parents and caregivers who are exhausted, often blamed, and looking for a way forward that doesn’t involve breaking their kid’s autonomy to “improve” them.

What PDA actually is

PDA is a profile of autism — increasingly recognised in Australia and internationally — where the central feature isn’t difficulty with social communication or sensory processing (though those are usually present too). The central feature is extreme avoidance of everyday demands, driven by anxiety about loss of autonomy.

That’s a clinical sentence. In practice it looks like:

• A 4-year-old who can’t tolerate being told “it’s time for lunch” even when they’re hungry
• A 7-year-old who refuses tasks they enjoy if they’re framed as instructions
• A teen who shuts down completely when given a deadline, even for something they want to do
• An adult who can’t make themselves do basic admin (book a GP, reply to an email) despite wanting to

The avoidance isn’t laziness. It isn’t defiance. It isn’t a parenting failure. It’s a nervous system that experiences external demands as a genuine threat. The kid isn’t choosing to refuse — their body is choosing for them.

Note: the AU/UK term “PDA” is contested. Some clinicians prefer “PDA profile of autism”. “Persistent Drive for Autonomy” is the reframed name many self-advocates prefer because it’s descriptive, not pathologising. We use the autonomy framing throughout this site.

Why traditional speech therapy backfires for PDA kids

Most speech therapy is built on demand. Sit here, look at this picture, say this word, take a turn, finish this activity, earn this sticker. Even “affirming” therapy that doesn’t use formal reward systems still typically has an agenda — words to model, milestones to reach, activities to complete.

For a kid with a PDA profile, almost every element of this triggers the demand-avoidance response. The result is one of three patterns:

1. Refusal — the kid won’t engage at all. Therapy stops working. Parents are blamed for not “preparing” the kid properly.
2. Surface compliance + collapse later — the kid masks through the session, performs the expected behaviours, then has a meltdown at home for the rest of the afternoon.
3. Gradual withdrawal — the kid starts okay, then progressively shuts down as the relationship accumulates demand.

None of these are the kid being “difficult”. All of them are predictable, neurologically grounded responses to a therapy model that wasn’t built for this nervous system.

What works instead

PDA-informed speech therapy looks different. The core moves:

1. Drop the agenda

There’s no “session plan” we walk in with. There’s no curriculum. There’s no list of words to target this week. Instead, we follow what the kid is doing, comment on it, model language around it, and that’s the session.

This sounds passive. It isn’t — it requires more skill, not less, because the clinician is modelling rich language and tracking development while staying entirely outside the demand zone. But it’s invisible from outside. PDA families sometimes feel like nothing is happening for the first 4–6 sessions. That’s the point. The first job is to make the relationship safe.

2. Use declaratives, not directives

Instead of “say cookie”, “tell me what you want”, or “use your words” — we say things like:

• “Oh, the cookie is on the high shelf.”
• “I wonder where the cookie went.”
• “This is the cookie.”

Declarative language describes the world without demanding a response. It invites a kid to join in commenting on the world, rather than perform language for an adult. For PDA kids this is often the difference between speaking and not speaking.

This is also borrowed from RDI (Relationship Development Intervention) and from the wider declarative-language community, but the principle holds even outside any specific framework: describe, don’t direct.

3. Indirect framing for everything

Things that need to happen still happen — but framed so the kid retains autonomy.

• Not: “It’s time to clean up.” Instead: “I wonder how we’d ever get this room sorted.” (Kid may or may not join in. Either is fine.)
• Not: “Look at this book.” Instead: leaving the book open on the floor and starting to read it yourself.
• Not: “Tell me what happened at school.” Instead: telling your own day, leaving lots of space, treating any contribution from the kid as a gift, not a goal.

For some PDA families this feels strange at first because it can look like nothing is happening. What’s happening is the kid’s nervous system is registering that they’re not being demanded of. Over weeks and months that creates the conditions where language and engagement can grow.

4. Respect refusal

When a PDA kid says no — including non-verbally, by walking away, by becoming non-responsive, by escalating — the answer is almost always to accept the no. Not to push. Not to try a different angle. Not to “do it together”. Not to insist gently.

This is the part most professionals find hardest. We’re trained to “shape behaviour”, to “build tolerance”, to “fade prompts”. With PDA kids, all of that increases avoidance over time because it’s all variations of “you must do the thing”.

The actual move: accept the no, name what just happened (“you’re not up for that today”), move on. Tomorrow is a different day. The kid’s autonomy is the prerequisite for engagement, not the reward at the end.

5. Reduce the demand load across the day

Speech therapy is one hour a week. The other 167 hours shape the kid’s nervous system far more. So parent coaching is doing most of the work in PDA cases: helping parents identify the demands they didn’t realise were demands, reducing them where possible, and disguising or declarativising the ones that have to stay.

Common surprises here:

• Asking how school was = a demand
• Reminding them about homework = a demand
• Suggesting they put their shoes on for the walk they asked for = a demand
• “Can you…?” = a demand
• “Would you like to…?” = often still a demand
• Even praise (“good job!”) = a demand, because it implicitly sets up the kid to keep performing

The goal isn’t to eliminate all demands — that’s impossible and not the point. The goal is to reduce demand-load to a level the kid’s nervous system can carry, so there’s some bandwidth left for actually living.

What this looks like in our sessions

A PDA-informed session at Speech Sprout might be:

• Telehealth, kid lying on the floor, camera optionally on
• Kid doing something they chose (Minecraft, drawing, lining up cars, reading aloud)
• Clinician describing, commenting, modelling — never asking, never directing
• Lots of silence
• Kid sometimes engaging, sometimes not
• Parent in the room or not, depending on what’s safer

What we don’t do:

• Sit at a table
• Show flashcards
• Run programs
• Use reward systems
• Set “session goals” the kid is meant to meet
• Insist the kid says hello / goodbye / “please” / “thank you”
• Tell the parent the session didn’t work because the kid didn’t engage

”But how do you make progress?”

This is the question PDA parents are most worried about, often because previous professionals have told them their kid needs “structure” or “consistency” or “to learn to follow instructions”. The fear: if we drop demands, the kid will never learn anything.

The reality, based on a growing evidence base around autonomy-supportive therapy:

• PDA kids in low-demand environments show more spontaneous communication, not less, over time
• Language often grows through self-directed engagement (special interests, books, screens, scripts) rather than through targeted intervention
• The “milestones” model is less useful with PDA kids — language emerges in clumps, often triggered by interest-driven obsession with a topic
• Forcing compliance produces short-term performance and long-term withdrawal; backing off produces slower visible progress but more durable real-world communication

What we measure instead of milestones: engagement (is the kid showing up), autonomy (can they say no without it becoming a crisis), language richness (when they choose to communicate, is it more elaborate than before), and parent regulation (is the household calmer).

When to suspect a PDA profile

If your kid is autistic and:

• Strong drive to be in control
• Extreme reaction to even small demands
• Better with novelty and roleplay than with predictable structure
• Often appears socially adept but burns out from masking
• Anxiety and meltdowns are the dominant features
• Traditional autism interventions made things worse, not better
• Strategies that work for non-PDA autistic kids (visual schedules, reward charts, “first/then”) backfire

… then a PDA profile is worth considering. There’s no formal diagnostic category for PDA in the DSM-5 or in most AU diagnostic pathways yet, but plenty of clinicians (us included) recognise the profile and work with it.

Where this fits with the broader autism work

PDA isn’t separate from autism. It’s a profile within autism — a way of describing how demand-avoidance presents in some autistic people. A PDA-informed approach is, in our view, the strongest version of neurodiversity-affirming therapy for any autistic kid where compliance-based models have caused harm. Even autistic kids who don’t fit the PDA profile often benefit from lower-demand, declarative-rich, autonomy-respecting communication.

For the broader posture, see our approach — the “what we won’t do” list there is basically a PDA-informed list applied to the whole caseload.

Where to start

If you’ve been told your kid has a PDA profile, or you’re starting to suspect it yourself, or you’ve just had your fifth round of therapy fall apart for reasons that sound like the above — book a free 15-minute call. We’ll listen, talk through what’s actually been happening, and decide together what (if anything) we should try.

For parents specifically, parent coaching is often the highest-leverage starting point — sometimes the kid doesn’t need to be in the room at all for the work that needs to happen.

Further reading

• PDA Society (UK) — pdasociety.org.uk — the primary self-advocacy and clinical resource
• Kristy Forbes (AU) — autistic and PDA-er, AU-based educator with extensive parent resources
• Casey Ehrlich, PhD (US) — At Peace Parents, parent coaching specifically for PDA families
• Harry Thompson (UK) — adult PDA-er, writes from inside the experience

The most important sentence in this article: a kid with a PDA profile is not refusing to cooperate. Their nervous system is refusing on their behalf, because cooperation feels unsafe. Make it safe first; cooperation often follows on its own.