Why Everyday Experiences Can Feel Overwhelming and What Parents Can Look for Instead
Supporting an Autistic child or young person with a Persistent Drive for Autonomy (PDA) profile often means trying to make sense of experiences that can appear inconsistent or unpredictable. Everyday activities may feel manageable one day yet overwhelming the next, even when the task itself has not changed. A routine that was completed with ease yesterday may feel impossible today, leaving families searching for explanations that extend beyond the activity immediately in front of them.
For many years, conversations about PDA have centred on the concept of demand avoidance. This has been an important shift in helping families recognise that distress is not a sign of defiance, laziness or a lack of motivation. Instead, it has encouraged a more compassionate understanding that everyday expectations can sometimes place (previously unrecognised from external viewers) extraordinary pressure and stress load on the systems of the PDA’er.
While this perspective remains valuable, demands alone do not always explain why participation fluctuates from one moment to the next. The same expectation may feel achievable in one situation but overwhelming in another. Understanding this variability requires us to look beyond the demand itself and consider the wider context in which it is experienced.
Increasingly, neuroaffirmative understandings of PDA encourage us to consider not simply what is being asked, but the wider experience of pressure and stress stacking surrounding the person. Everyday experiences are influenced by the cumulative interaction of sensory processing, uncertainty, communication, transitions, social expectations, relationships, physical wellbeing, internal body signals, opportunities for autonomy and agency, power dynamics, previous experiences and accumulated stress. Together, these factors continually shape how the PDA’er experiences the world and what feels possible in a particular moment.
Importantly, pressure and stressors cannot always be measured by looking at the apparent size of an expectation from the outside. An experience that appears minor to another person may carry significant sensory, cognitive, emotional, relational or autonomy-related meaning for the person experiencing it.
Rather than viewing distress as the direct result of a single request or expectation, it can be more helpful to understand it as the possible outcome of multiple interacting influences. The request that appears to precede distress may simply occur at a point where accumulated pressure and stressors is already high, available resources are reduced, autonomy feels constrained, or the person is managing far more than is visible from the outside.
This broader perspective does not diminish the importance of understanding demands. Instead, it recognises that demands are experienced within a much richer context. Exploring that context can provide a deeper understanding of why everyday experiences sometimes feel overwhelming and help us create environments that better support regulation, autonomy, agency, relational safety and meaningful participation.
Looking Beyond Demands
Understanding demands remains an important part of supporting Autistic people with a PDA profile. Everyday expectations, whether they arise from other people, the environment or ourselves, can require the person to process information, adapt and respond.
Long before a request is made, an individual may already have navigated sensory discomfort, uncertainty, transitions, communication demands, social interaction, waiting, decision-making, physical fatigue, internal body signals or unexpected changes. They may also be anticipating what is going to happen next, aware that something needs to be done, or experiencing reduced autonomy within a situation. Each experience may require only a small amount of additional effort, yet together they can gradually increase the overall level of stress being experienced.
The task itself may be unchanged, but the conditions surrounding it are not. Participation is influenced not only by what is being asked, but also by how, when, why, by whom and under what circumstances it is experienced.
There is also an important relational dimension to pressure and stress stacking. The same words may be experienced differently depending on who is speaking, what has happened previously within that relationship, whether the person trusts that their boundaries will be respected, whether saying no is available and how much meaningful influence they have over what happens next. Pressure experienced therefore cannot be understood solely by examining the wording of a request.
Recognising these interacting factors provides a more complete understanding of why participation may fluctuate and shifts our attention towards creating conditions that better support regulation, flexibility, agency and meaningful engagement.
What Do We Mean by Pressure?
When discussing PDA, pressure can be understood as the cumulative internal, external, environmental and relational experiences that increase protective responses activation, constrain autonomy or agency, or reduce the resources available for participation. It extends beyond being asked to complete a task and includes the many experiences that require ongoing processing, adaptation or response throughout the day.
Pressure is therefore not simply another word for demand. A demand may create pressure, through sensory discomfort, uncertainty, time pressure, transitions, internal body signals, anticipation, social expectations, previous experiences, decision-making, being observed, perceived power imbalance, reduced autonomy or simply knowing that something needs to happen.
For some people, putting on a pair of shoes before leaving the house may involve very little additional effort. For another person, that same moment may occur after a poor night's sleep, uncomfortable clothing, an unexpected change to the morning routine, multiple verbal reminders, uncertainty about the school day ahead and sensory discomfort. The person may also feel rushed, aware that other people are waiting, or experience little meaningful influence over whether they leave the house at all.
The physical task of putting on the shoes has not changed, but almost everything surrounding it may have.
The task itself may therefore not be the greatest source of difficulty. Instead, it is the interaction between the activity, the person's current resources, autonomy, relational context and everything their nervous system has already been managing that influences whether participation feels possible.
Pressure is therefore rarely created by one isolated event. It may emerge through the cumulative stress experience of adapting to multiple internal and external influences while also navigating expectations, relationships and autonomy. As these experiences accumulate, the resources available for managing something new may gradually reduce.
Why Pressure Can Change From Day to Day
One of the most common experiences reported by families is that participation appears inconsistent. An activity that felt achievable yesterday may feel overwhelming today, even though nothing obvious appears to have changed.
In reality, the context has almost certainly changed.
No two days are identical. Sleep quality, physical health, sensory experiences, social interaction, cognitive demands, emotional wellbeing, transitions, uncertainty, autonomy, internal body signals and previous experiences continually influence the resources available to us. These changing conditions mean that participation is naturally dynamic rather than fixed.
This is particularly important when thinking about capacity. Being able to do something yesterday does not establish that the same resources are available today. Likewise, being able to participate earlier in the day does not necessarily mean that participation remains accessible several hours later.
Throughout the day, seemingly small experiences often require ongoing adjustment. Waiting in traffic, coping with unexpected noise, navigating busy environments, processing conversations, making decisions, managing uncertainty or recovering from earlier stress all require energy. Individually these experiences may appear insignificant. Collectively, they can substantially influence how manageable later situations feel.
Stress Stacking
This cumulative process can be understood as stress stacking, where multiple sources of pressure gradually build over time. The final request or expectation may therefore appear to trigger distress when it actually occurs at a point where the individual's available resources have already been significantly reduced or pressure has already become difficult to accommodate.
Understanding this cumulative nature of pressure helps explain why distress can sometimes appear sudden or disproportionate to the situation from an outside perspective. Rather than assuming the individual has moved rapidly from being calm to overwhelmed, it may be more accurate to consider the possibility that pressure has been building over an extended period. The final situation may simply be the point at which those accumulated pressures become visible.
When someone appears to move from "0 to 100", what we could observe may have been at zero while internally they were already managing considerable pressure and stressors. The final event did not necessarily create the distress. It may simply have been the point at which accumulated stress stacking became visible to us.
Pressure Is Influenced by Many Interacting Factors
Although demands may contribute to feelings of pressure, they represent only one part of a much broader picture. Everyday participation is shaped by the continual interaction between the individual, their nervous system, their relationships and the environment around them.
No single factor acts in isolation. Instead, multiple experiences often combine to affect whether a situation feels manageable. Some sources of pressure may be immediately visible, while others remain largely unnoticed by the people providing support.
Understanding these different influences allows us to develop a richer picture of why participation may fluctuate across different environments and at different times.
Sensory Experiences
Sensory processing influences every aspect of daily life. Bright lighting, background noise, crowded environments, uncomfortable clothing, strong smells or fluctuating temperatures may all require additional cognitive and physiological resources to process. Although these experiences are not always obvious to others, they can significantly influence how much capacity remains for engaging in other activities.
Uncertainty and Predictability
Knowing what to expect can reduce the processing required to navigate an experience. In contrast, uncertainty about what will happen, changes to familiar routines or unclear expectations may increase pressure before an activity has even begun.
Predictability, however, should not be confused with autonomy. Something can be highly predictable and still feel coercive or pressurising. Knowing exactly what is going to happen does not necessarily make an experience manageable if the person has little meaningful influence over whether or how it happens.
Communication
Everyday communication involves far more than hearing words. Processing spoken language, interpreting meaning, responding to questions, managing conversations and shifting attention all require cognitive effort. Multiple reminders, repeated prompts or rapid questioning may unintentionally increase pressure when the nervous system is already working hard to manage other experiences.
Even communication intended to be supportive can sometimes add pressure. Questions such as "What's wrong?", "What do you need?" or "Would you like me to help?" still require processing, decision-making and responding. At times, support may involve fewer words, fewer questions, more time, quiet companionship or practical assistance rather than additional communication.
Transitions
Transitions require continual adjustment between people, places, activities and expectations. Moving from one environment to another often involves changes in sensory input, attention, emotional regulation and communication. Even positive transitions may require considerable effort and can influence participation long after the transition itself has occurred.
Transitions can also involve a loss of autonomy over attention. Stopping an absorbing or meaningful activity because something else needs to happen may itself create considerable pressure, particularly when the person's attention is deeply engaged.
Social Expectations
Many everyday environments involve complex social demands that often go unnoticed. Greeting people, interpreting body language, maintaining conversations, masking differences, responding appropriately and navigating social rules all require sustained cognitive effort. These hidden expectations can contribute significantly to the accumulation of stress stacking experienced throughout the day.
Internal and Interoceptive Pressure
Not all sources of stress stacking come from other people or the external environment. The body itself continually generates information that may require attention or action.
Hunger, thirst, fatigue, pain, temperature, needing the toilet, strong emotions or recognising the need to stop and rest can all create internal pressure. For some Autistic people, identifying, interpreting or responding to these interoceptive signals may itself require considerable processing.
There can also be stressors in simply knowing that something needs to happen, even when nobody else has mentioned it. The awareness that it is time to eat, shower, sleep, leave the house or complete something can create pressure independently of an externally imposed demand.
Internal expectations may also contribute. Perfectionism, fear of making mistakes, uncertainty about whether something has been completed correctly or concerns about disappointing others can become just as demanding as expectations originating from the outside world.
Autonomy, Agency and Power
Autonomy is central to understanding PDA, but autonomy involves considerably more than being offered choices.
Meaningful autonomy concerns having meaningful influence over what happens to us, including the possibility of expressing preferences, changing course, disagreeing, asking for something different or saying no.
Offering two predetermined options does not necessarily create autonomy. "Do you want to brush your teeth now or in five minutes?" still assumes that toothbrushing will happen. "Red shoes or blue shoes?" may offer little meaningful autonomy if the actual source of demand is leaving the house.
This does not mean that choices are inherently unhelpful. For some people they can reduce uncertainty and support participation. What matters is whether the choice meaningfully increases agency or simply presents an expectation in another form.
Power also matters. Children and young people naturally exist within relationships where adults hold considerable practical and social power. Pressure may increase when the person anticipates persuasion, consequences, disappointment or conflict if they do not participate.
Reducing relational pressure is therefore not simply about finding the "right words". Trust, previous experiences, power, autonomy and whether boundaries are respected all contribute to how communication is experienced.
Understanding and Supporting Participation
One of the most significant shifts that can occur when supporting an Autistic person with a PDA profile is moving away from viewing participation as something that must be achieved through increasing encouragement, persistence or motivation. Instead, participation can be understood as something that may become more accessible when the conditions around the individual support sufficient safety, autonomy, predictability and available resources.
Participation is not determined by willingness alone. It is influenced by the interaction between the individual, their nervous system, their autonomy, their relationships and the environment in which the activity takes place.
When participation feels difficult, it can be helpful to consider the wider conditions surrounding the situation rather than focusing solely on the task itself. Factors such as sensory comfort, predictability, communication, physical wellbeing, interoception, opportunities for autonomy, trusted relationships, power and accumulated stress all influence how achievable an activity may feel.
Importantly, these conditions are continually changing. An environment that supports participation one day may require adaptation the next because the individual's experiences, energy levels and available resources have also changed.
This means that support may need to fluctuate too.
At times, reducing unnecessary expectations may be appropriate. On a day when resources are particularly limited, an adult might provide more practical help with dressing, simplify a routine, allow food to be eaten somewhere more comfortable, reduce the number of decisions required, postpone something that does not need to happen or complete part of an activity alongside the person.
Providing more support when capacity is reduced is not a failure of independence. It is a responsive acknowledgement that human capacity fluctuates.
Difficulty participating is therefore information. It can invite us to look beyond the activity itself and consider what the person's experience may be telling us about pressure, resources, sensory experience, uncertainty, autonomy, relationships or the environment.
Creating supportive conditions is therefore not about removing every challenge or expectation. Nor is reducing pressure a technique for obtaining compliance. It is about recognising that adjustments to communication, predictability, sensory experiences, flexibility, relationships, power and opportunities for autonomy can collectively change how an experience feels.
When Support Itself Creates Pressure
An important part of understanding PDA is recognising that support offered with the best intentions can sometimes become another source of pressure.
Repeated offers of help, multiple questions, encouragement, praise, reminders or attempts to problem-solve can all add communication and relational demands at a moment when the person may already be managing considerable stress stacking.
Even offering choices can become difficult when choosing itself requires resources that are not currently available. Support therefore does not always mean doing more.
Sometimes support may mean reducing language, allowing additional processing time, removing unnecessary decisions, offering practical assistance without taking over, changing the environment, reducing steps, allowing something to wait or simply remaining alongside the person without requiring an immediate response.
Understanding Pressure in Everyday Life
Understanding pressure becomes easier when we consider how it may influence everyday experiences. The examples below are not intended to explain every situation, nor will every Autistic person with a PDA profile experience them in the same way. Instead, they illustrate how participation is often shaped by the interaction of multiple influences rather than one isolated demand.
Leaving the House
From the outside, putting on shoes and walking out the door may appear to be a straightforward request. However, by this stage of the morning an individual may already have navigated poor sleep, sensory discomfort from clothing, changes to their routine, multiple conversations, uncertainty about the day ahead and the pressure of time.
There may also be another dimension. The person may know that leaving the house means ending a preferred activity, entering an uncertain environment or relinquishing some influence over what happens next.
The request to leave the house may therefore occur at a point where the nervous system has already invested considerable effort adapting to everything that has come before it.
Attending School
The school day involves far more than academic learning. Navigating busy corridors, changing classrooms, managing social interactions, coping with sensory differences, responding to questions, following instructions and adapting to changing expectations all require ongoing cognitive and emotional effort.
School also involves significant relational and structural power. Timetables, movement, communication, clothing, breaks, access to preferred activities and opportunities to leave are often determined by adults and systems rather than by the student themselves. For some PDA students, this reduced autonomy may represent an important part of the stress stacking associated with school.
Even when learning itself is enjoyable, the broader school environment may therefore create significant cumulative activation that influences participation throughout the day.
Homework
Homework is often viewed as an extension of learning. However, it usually occurs after a full day of managing sensory experiences, social interaction, communication, transitions and sustained attention. The difficulty may therefore be less about the homework itself and more about the reduced resources available to engage with another cognitively demanding activity.
Family Outings
A visit to the supermarket, a family celebration or a trip into town may appear relatively simple from the outside. Yet these experiences often involve unfamiliar environments, noise, bright lighting, waiting, decision-making, changes to routine, social expectations and reduced opportunities for recovery.
They may also involve uncertainty about how long the experience will last, when the person can leave, what social interaction will be expected or how much influence they will have over what happens. These interacting experiences can increase stress stacking long before any visible signs of distress emerge.
Bedtime
Evening routines are often expected to be calming, yet bedtime arrives after an entire day of adapting to internal and external experiences. Fatigue, accumulated sensory experiences, emotional processing and the transition from activity to rest all require further adjustment from the nervous system.
Bedtime also contains internal demands. The body may be tired while the mind remains deeply engaged. The person may know they need to sleep while simultaneously experiencing the transition away from an absorbing activity as difficult.
What appears from the outside to be resistance to bedtime may therefore reflect a much more complex interaction between accumulated pressure, internal body signals, transition, autonomy and available resources.
Understanding the Bigger Picture
Understanding pressure in PDA is not about replacing one explanation with another. Demands remain an important part of understanding everyday experiences of PDA’ers, but they are only one piece of a much broader picture.
Participation is continually shaped by the interaction between the individual, their nervous system, their body, their relationships and the environment around them. Sensory experiences, uncertainty, communication, internal body signals, relationships, accumulated stress, autonomy and agency, power, physical wellbeing and previous experiences all influence how manageable a situation feels.
Stress stacking helps us understand one important part of this picture: pressure can accumulate. However, accumulated stress is not the only way pressure can arise. Pressure can also emerge when autonomy feels constrained, when relational dynamics feel unsafe, when internal body signals require action, when uncertainty is high or when previous experiences shape how the nervous system anticipates what may happen next.
Recognising these interacting influences provides a richer understanding of why participation may fluctuate from one moment to the next.
This broader perspective encourages us to move beyond asking why an activity was difficult and instead consider the conditions in which it occurred. Rather than searching for a single trigger, we begin to recognise that everyday participation emerges from many interconnected experiences that together influence what feels possible in that moment.
Supporting an Autistic person with a PDA profile is therefore not about eliminating every challenge or removing all expectations. It is about developing a deeper understanding of the factors that influence participation and creating environments that reduce unnecessary pressure while supporting autonomy, agency, regulation, connection and relational safety.
It also means recognising that capacity changes. What was possible yesterday may not be possible today. What required little support last week may require substantial support this week. Responding flexibly to those differences is not inconsistency. It is responsive support.
When we begin to understand pressure rather than simply identify demands, we move closer to understanding the conditions that allow participation to become possible.
A Note on the Evidence Base
Research specifically examining PDA remains in its relative infancy, and understandings of PDA continue to evolve. There remains considerable debate within research and clinical communities regarding its conceptualisation, terminology and relationship with Autism, and there is still much to learn directly from PDA people about the processes underlying their experiences and the forms of support they find helpful.
There is also not currently a robust evidence base specifically establishing strewing as an intervention for PDA. For that reason, I do not present strewing here as an evidence-based treatment, prescribed strategy or universally appropriate approach.
This article represents an evolving synthesis of my own lived experience as an Autistic PDA person and parent, together with emerging PDA research and theory, wider Autism research and neuroaffirmative understandings of autonomy, Monotropism, sensory experience, executive functioning, regulation, relational safety and person-centred support. Lived experience is particularly important within an emerging field, while also being recognised as experience rather than evidence that every PDA person will share the same needs or perspectives.
PDA people are not a homogeneous group. An approach that feels spacious, respectful and autonomy-supportive for one person may feel intrusive, uncertain or pressurising to another. The individual person's communication, preferences, boundaries and lived experience should therefore remain central to any support.
As the research base develops, and as knowledge generated by PDA people themselves continues to expand, this article will continue to be reviewed and updated. The intention is not to present a fixed or definitive model of PDA, but to reflect the best available understanding while remaining open to changing that understanding as we learn more.
