Pervasive Drive for Autonomy (PDA) is a nervous system response

You've tried the sticker charts. You've followed the advice. You've been consistent, firm, patient, and then firm again. And still, every morning feels like a negotiation that ends in tears. Yours and theirs. The professionals say your child is being oppositional. The grandparents say you're too soft. And somewhere underneath all of it, you have this quiet, persistent feeling that everyone is looking at the wrong thing.

What if they are? What if what looks like defiance is actually a nervous system asking for safety, and the strategies designed to address it are the very thing making it worse?

In Episode 39 of the Neurodivergent Pulse podcast, host Laetitia Andrac speaks with Sarah Middleton, a neurodivergent social worker, educator and parent, and the founder of Brilliant Little Gems, about what current behaviour-focused frameworks miss about PDA, and what becomes possible when we replace them with curiosity, compassion and genuine autonomy. Sarah is a late-identified autistic ADHDer who also identifies as PDA, and she brings both professional expertise and lived experience to a conversation that is, frankly, one of the most grounding things you can listen to if you are in the thick of it right now.

Is pervasive drive for autonomy (PDA) a nervous system response?

"Often it's not that they don't want to, it's that they can't." That line from Sarah Middleton is also the thing that most behaviour-focused approaches get exactly backwards.

Pervasive drive for autonomy, also known as the PDA profile, sits within the autistic spectrum. The full term is still the dominant way families and professionals search for and discuss this profile, though language within the community continues to evolve. Both "Persistent Drive for Autonomy" and "Pervasive Drive for Autonomy" are used as alternatives, and both are valid. What Sarah brings to the conversation is something the research alone cannot offer: the experience of living it, parenting it, and working professionally with families navigating the PDA profile autism lens every day.

Her path into this work began at eight years old, when she told her grade four teacher she wanted to be a primary school teacher, drawn to the possibility of helping children feel seen and understood. That thread ran through a teaching degree, a pivot to social work, and eventually to founding Brilliant Little Gems after her own family's journey into understanding neurodivergence. Along the way, she discovered that the frameworks she had been trained in, the ones most professionals still use, were not built to understand what PDA children are actually experiencing.

What behaviourist strategies miss about pervasive drive for autonomy

Behaviourist approaches focus on what is visible from the outside, and they assume a relatively simple chain of cause and effect. See the behaviour, identify the trigger, modify the response. For many children, this works well enough. For children with a PDA profile, it tends to make things worse.

Sarah describes the problem directly: "I feel like when we're focusing on the behaviors and then assuming what that means. Okay, well, if it's this, if it looks like this, it means this, based on our, I guess, really the paradigm we've been offered, um, in allied health and in education, which is founded in a behaviorist approach, essentially." The A-B-C model, she explains, misses the nervous system entirely. It treats the visible behaviour as the thing to address, when the behaviour is actually a signal of something happening underneath. Understanding behaviour as communication and co-regulation offers a different starting point entirely.

The emotional toll on families is real. Understanding Zoe's research on neurodivergent families found that 64% of parents raising neurodivergent children often feel exhausted and 64% feel overwhelmed, compared with 42% and 32% of parents raising neurotypical children. When the framework being used doesn't fit the child, everyone in the family pays the price.

Pervasive drive for autonomy is a nervous system experience. The drive for autonomy is not a personality trait or a parenting outcome. It is how a particular nervous system responds to perceived threat, and pressure, expectation and assumption are among the most reliable ways to activate that threat response. When professionals and families focus on the behaviour without understanding this, they often increase the very pressure that is driving the distress.

What Sarah offers instead is a different starting point:

The most important thing is unconditional positive regard for the child, and we can connect from a place of curiosity and compassion.

This is not a technique. It is a fundamental shift in how we understand the child in front of us. Yes, there are frameworks and tools that help, including the UK PDA Society's PDA pyramid, which Sarah references as a useful visual for understanding nervous system activation levels. But the frameworks serve the relationship, not the other way around.

How pressure and expectation trigger a PDA stress response

Pressure is the single most reliable trigger for a PDA stress response, and it arrives in more forms than most people realise. Direct questions, implied expectations, assumed routines, even well-meaning encouragement can register as pressure to a nervous system wired this way.

Sarah is direct about the mechanism: "One of the easiest ways to trigger PDA stress responses is pressure and expectation, and making assumptions." The inverse is equally true. When pressure is removed and genuine choice is offered, the nervous system can settle, and what looked like refusal often dissolves on its own.

This is where the practical shift begins. Rather than asking direct questions that add to the pressure load, Sarah recommends becoming a "nervous system detective" alongside the child. "Shifting the approach to 'I wonder', and joining them in almost being, like, a little bit of a detective, a nervous system detective, um, changes things."

In practice, this means moving away from interrogation and towards shared curiosity. Some things that tend to activate demand avoidance in autism, and some that create space instead:

• Direct questions like "what happened?" or "why did you do that?" add pressure, even when asked gently. Replace them with "I wonder" language that invites rather than demands.

• Fixed expectations and assumed routines signal threat to the PDA nervous system. Offering genuine choice, even within a structure, shifts the dynamic significantly.

• Praise and reward systems can backfire if they feel like performance pressure. Connection and curiosity tend to land better than evaluation.

• Transitions and demands that arrive without warning are harder to manage than those that come with lead time and options.

• A regulated adult nervous system matters more than any specific strategy. The child's system is reading yours constantly.

None of this means abandoning all structure or expectations. It means examining which expectations are genuinely necessary and which are being held out of habit or external pressure, a question Sarah returns to throughout the conversation.

What changes when a school gets on board: a story

Theory only goes so far. Sarah's example of a year seven student shows how quickly things can shift when the adults around a child are working from the same understanding.

The student was showing early signs of burnout: exhausted, overwhelmed, struggling to get to school. Understanding energy accounting to prevent neurodivergent burnout can help families and schools recognise this cycle before it becomes a crisis. The more fatigued they became, the less able they were to meet the demands of the school day. The more those demands pressed in, the more their capacity eroded. It was a cycle heading in one direction.

It is worth remembering what families are already carrying before a school crisis emerges. Research across more than a thousand Australian families found that parents of neurodivergent children spend around 10.5 hours every week on emotional regulation, advocacy and administration alone, alongside roughly 30 hours of caregiving overall. By the time a family reaches out to a school for help, they are rarely starting from a place of rest.

The intervention was not a new behaviour plan. It was a conversation between the family and the school, focused on one question: where can we create space? The student was given choice about when to attend, whether to sit end-of-semester tests, and which subjects to drop, including replacing one class with time on a special interest.

Within weeks, things shifted. "When we create this space, this young person could choose that they wanted to sit all of their tests. That was important to them. A week earlier, before we created the space and had these conversations, and gave the choice... it was like a weight lifted off the young person with PDA profile."

And then: "All of a sudden they're back in the driver's seat making their decisions about what they want."

This is the thing that behaviourist frameworks tend to miss. When a child with a PDA profile is given genuine choice, they often choose engagement. The student who was given the option to skip their tests chose to sit all of them. Not because they were required to, but because the choice was theirs. For educators and parents wanting to understand what neuroaffirming classrooms look like in practice, we have a dedicated guide.

When your school or family doesn't understand pervasive drive for autonomy

Shifting to a neuroaffirming approach is not a one-time decision. It is daily work, and it is significantly harder when the people around you are not on the same page.

Sarah describes the ongoing practice of examining her own expectations: "Are you holding yourself or your children to a standard that, you know, like, doesn't fit their neurotypes, doesn't work for you guys?" That question, she says, has to be asked again and again, because the pull of neuronormative expectations does not disappear once you have learned to name it.

What makes this harder is the judgement that often comes from outside the immediate family. Extended family, in-laws, old friends, sometimes even therapy teams, can respond to a shift in approach with confusion, criticism or opposition. Sarah does not soften this:

It is a very painful experience to have people saying you're getting it wrong.

That pain is not an outlier. In our survey of over a thousand families, 93% of parents of neurodivergent children said their experience feels misunderstood or invisible (see our full research report). You are not imagining it, and you are not alone in it.

She has heard from parents who are doing careful, thoughtful work to accommodate their child's needs, only to be told by people close to them that they are causing harm. That kind of pressure, coming from people you love and whose opinions matter to you, makes it genuinely difficult to maintain the open, spacious response that PDA children need.

The same dynamic can appear within a partnership. Sarah describes a pattern she sees often: one parent, frequently the mother, has done significant learning and processing and is ready to make changes, while the other parent is reluctant or has not yet engaged with the same material. Our conversation on navigating neurodivergent parenting across different neurotypes explores this dynamic in depth.

This is not, she emphasises, because the reluctant parent does not care. When she meets those parents, she sees "this, like, protective nature, this real love for the family." The reluctance usually comes from fear, from the ideas about good parenting they were raised with, and from not wanting to let their family down. As understanding grows, that protective instinct tends to shift into something more useful.

This is also where having support matters. Understanding Zoe's research, across more than a thousand families, found that relationships with extended family and friends are among the hardest parts of the neurodivergent parenting journey. Support workers and teachers consistently rated as the most supportive people in families' lives, while extended family (7.2 out of 10) and friends (7.4 out of 10) scored the lowest on support, reflecting a measurable gap between professional understanding and personal networks.

Building an ecosystem where your school, your therapy team and your close relationships are working from the same understanding of pervasive drive for autonomy is not a luxury. As Sarah puts it: "If your child's going to school, you need your school to be on board with that. You need your therapy team to be on board with that. Because if you adopt this shift, and you've got an external, like, pressure, or you're being told you're wrong somehow, um, it's very, very hard to have that genuinely open, spacious response."

Why the body holds information the mind can't reach

Talking through problems, identifying thought patterns, building insight through conversation: cognitive approaches alone often fall short for neurodivergent people. Sarah's own experience as a late-identified autistic ADHDer is instructive here.

Before her identification, she had accessed a range of supports, most of them cognitive in focus. "That cognitive mind is only a portion of it," she says, describing why those approaches did not produce lasting change. So much of what she had experienced was held in her body, not accessible through thinking alone. Real insight required someone skilled in working with the body, not just the mind.

She began bringing this into her mental health social work years before she had language for it. Clients would arrive each week telling the same story, stuck in loops, intellectualising brilliantly but not shifting. She started asking simple questions: "I would maybe just ask a question of, 'Well, where do you notice that in your body?' Or, 'What's happening in your body right now?'"

The response was often startled recognition. Many of her clients, she suspects now, were unidentified neurodivergent adults who had learned to manage life entirely from the neck up. When they were invited to drop into the body, new information arrived. A sensation, an image, something that had no words yet. And they would leave the session feeling genuinely different, not because they had worked harder, but because they had accessed something the cognitive mind could not reach on its own.

For late-identified adults in particular, somatic approaches can be a way back to themselves, a reconnection with an inner life that years of masking and managing may have made hard to access.

PDA autism strategies: where to start

Permission is the first step. Permission to question whether the strategies you have been given actually fit your child. Permission to let go of expectations that were never designed with your child's neurotype in mind. Permission to try something different, even if the people around you are not there yet. For a grounded look at what PDA parenting looks like in the everyday moments, including from a parent who is also PDA herself, listen to Laetitia's solo episode on this.

From there, Sarah's practical guidance is grounding and specific. A low demand parenting approach does not mean abandoning all structure; it means starting with the nervous system rather than the behaviour. Here are some places to begin:

• Notice when you are focused on the behaviour itself rather than what the nervous system might be communicating underneath it. The behaviour is a signal, not the problem.

• Replace direct questions like "what happened?" with "I wonder" language. Become a nervous system detective alongside your child rather than an investigator across from them.

• Ask yourself regularly: is this expectation actually essential, or am I holding my child to a standard that does not fit their neurotype? The answer will sometimes surprise you.

• Look for pockets of rest and choice within your child's day, especially at school. You do not need to overhaul everything at once. Small spaces of autonomy can shift a great deal.

• Build alignment across your child's ecosystem. Family, school and therapy team all working from the same understanding makes the shift sustainable. One person holding it alone is exhausting and fragile.

• Try simple body-awareness questions when conversations feel stuck: "Where do you notice that in your body?" can open up information that talking in circles cannot reach.

• Give yourself the same compassion you are learning to extend to your child. This is ongoing work, not a destination.

Sarah's resources at Brilliant Little Gems include A Story About My Brain, a children's picture book written to explore demand avoidance, and a toolkit for supporting PDA at school, designed for teachers, allied health clinicians and families who want to share practical frameworks with educators. If you are looking for somewhere to turn the insights from this episode into daily practice, you can also try Understanding Zoe free for 7 days, a platform built to help families turn every report, observation and hard moment into an actionable next step, so you are not holding the whole cognitive load alone.

Frequently asked questions

Is PDA the same as oppositional defiant disorder (ODD)?

No. Pervasive drive for autonomy and ODD may look similar from the outside, but they are fundamentally different. ODD is understood as a behavioural pattern, while PDA is a nervous system response rooted in the autistic profile. Children with a PDA profile are not choosing to be defiant; their nervous system is responding to perceived threat. This distinction matters enormously for how we support them, because strategies designed for ODD often make things significantly worse for PDA children. Connection-based approaches for neurodivergent young people offer a more effective starting point.

What neurological condition is pervasive drive for autonomy?

Pervasive drive for autonomy is understood as a profile within the autistic spectrum, not a separate neurological condition. The Pervasive drive for autonomy profile describes a particular way the nervous system responds to perceived pressure and loss of autonomy. Research is still evolving, and terminology within the community continues to shift, with many people now preferring "Persistent Drive for Autonomy" or "Pervasive Drive for Autonomy" as more affirming alternatives to the original clinical name.

Do children with a PDA profile have sensory issues?

Yes, sensory sensitivities are common in demand avoidance autism profiles, as they are across the autistic spectrum more broadly. Because PDA is a nervous system experience, sensory input can contribute to the overall pressure load a child is carrying. Something that seems minor, like a tag in a shirt or background noise, can tip a nervous system that is already close to its threshold. Reducing sensory load is one way to create more space in a child's day.

What is low demand parenting and does it work for PDA?

Low demand parenting is an approach that reduces unnecessary expectations and pressure to help a PDA child's nervous system feel safer. Rather than eliminating all structure, it involves examining which demands are genuinely essential and letting go of those that are not. For many families navigating Pervasive drive for autonomy, this approach creates the conditions for genuine engagement rather than constant conflict. It works best when the whole ecosystem around the child, family, school and therapy team, is aligned. You can try Understanding Zoe free for 7 days to explore how to put this into practice.

TL;DR

Pervasive drive for autonomy is a nervous system experience, not a behaviour problem, and that distinction changes everything about how we support PDA children. As Sarah Middleton puts it, "often it's not that they don't want to, it's that they can't." Pressure, expectation and assumption are among the easiest ways to trigger demand avoidance responses, while choice, autonomy and curiosity create space for real engagement. The shift from behaviourist frameworks to a nervous system lens is ongoing, daily work, and it goes better when family, school and therapy team are all working from the same understanding.

Connect with Sarah Middleton

• Website: brilliantlittlegems.com.au

• Instagram: @sarah.middleton.blg

• Children's picture book: A Story About My Brain, written to explore demand avoidance with children

• School toolkit: available at Brilliant Little Gems, for teachers, allied health clinicians and families wanting to support PDA children at school