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Pathological Demand Avoidance

Pathological Demand Avoidance

Pathological Demand Avoidance (PDA) is currently considered a distinct profile of autism, or an Autism Spectrum Condition (ASC).

It was originally called PDA Syndrome by Elizabeth Newson who observed a phenomenon in children suspected of having autism, whose difficulties, strengths and behaviours deviated from "classic" autism in some fundamental ways that were consistent with each other. She viewed it at the time as a separate condition (like ADHD) that had similarities to autism, but it has now been more widely recognised as a profile within the autism spectrum. For my part, I am somewhat ambivalent on the topic of where PDA "sits" because I feel that there is more to learn by looking at neurodivergence more broadly, but I am very clear that PDA is a distinct form of neurodivergence that shares traits with other neurodivergences.

Gaining a little understanding of PDA

Demand avoidance is simply avoiding doing things when they are considered a demand. Sounds simple. We all do it right? We don't want to do what we are told, or to do the stuff we find unpleasant! The first tricky bit of this is considering what is actually a demand. You may imagine it is when someone tells or asks you to do something. Actually demands are more widespread than this, constituting things that are asked of us, things that are expected or hoped of us, things that we expect of ourselves, including things that are just the normal expectations of society, like washing yourself.

Here is where the pathological bit comes in. People who are pathologically demand avoidant cannot do things when (and because) they perceive them as a demand. They avoid not only unpleasant tasks, but things they actually want to do, simply because they are told to, expected to, or the expectation of certain behaviour whilst doing it is too high. They avoid normal, everyday tasks like washing themselves, getting dressed, expected social conventions, and going to bed. They avoid things that you wouldn't even see as a demand, because they demand them of themselves. PDAers can be paralysed by their expectations of what they believe they should be doing or achieving.

​From the PDA society website, "This extreme avoidance extends to the most basic demands of everyday living and is not limited to the avoidance of unpleasant, difficult, specific anxiety-provoking or unappealing tasks. Someone with a PDA profile will also have tremendous difficulty complying with their own self-imposed expectations and with doing things that they really want to do".

This distinction is important to understand because other neurodivergent people experience demand avoidance, but for different reasons, such as executive function difficulties, or anxiety. PDA avoidance is not triggered by fear of, or difficulty with, the activity, but by it being a demand. You can read more about the distinction between avoidances here.

Although this pathological demand avoidance is clearly a key behaviour of this neurotype, it is certainly not the only feature and it is important to understand the driver behind it and the other characteristics of PDA. It is a little sad to me that the profile is named after one of the biggest struggles that a PDA person faces. Labels and language are super important, and sometimes the name of this neurotype cause and increase misunderstanding. We need to increase the awareness and understanding of this neurotype in professional settings, in the community, through appropriate literature, and in the education system, so that we can  ensure that PDA is recognised, diagnosed more consistently, and support systems are put in place.

The PDA neurotype in detail

From my perspective, the overriding feature of this neurotype is an intense and pervasive need for personal freedom and self-determination, also known as autonomy. The PDAer needs to live their life according to their own rules, their own code and compass, and would really prefer the world changed to fit that. This can make PDAers great activists and revolutionaries, people who lead and inspire others and ultimately pretty awesome people, except when they have to live under other people’s rules and demands. I would personally prefer that PDA stood for Pervasive Drive for Autonomy or Pervasively Driven Autonomist, a name that myself and Lily Style came up with in discussion. You can read more about a name change here.

PDAers exhibit three main behaviours that stem from this intense need for freedom and self-determination:

1. Taking control

The first is often and most commonly described as an “anxiety-driven need for control”. PDAers need to be in control in most situations and find it very stressful when they are not, unless they have put in place a coping strategy or are happy to surrender their control willingly. Many professionals describe this anxiety as the driving force of PDA, but I disagree and I know I am not alone amongst adult PDAers.

I contend that the intense need for autonomy is the fundamental neurology of the PDAer, and when this pervasive need is not met, or freedom is challenged, the consequent anxiety leads to a need for control, to controlling behaviour, and the following two behaviours of PDAers.

2. Avoiding demands

The most obviously observed feature of the PDAer is, unsurprisingly, a person who will pathologically avoid demands from others, themselves and the demands of everyday life. The word "pathologically" is key here. It is the extreme, obsessive and atypical nature of the avoidance that distinguishes this neurotype, and neurodivergence. This behaviour is again caused by personal freedom and self-determination being challenged and compromised. Autistic people who are not PDA display demand avoidant behaviour in certain situations, specifically when they are asked to do things with which they are uncomfortable, or are anxiety inducing for them as an Autistic person. In ADHD, demand avoidance can happen due to difficulties with executive function, and fer of failure. This is not the same as for the PDAer whose anxiety is triggered by the demand itself, even if the demand is for something they enjoy or wanted to do.

Imagine if you will that a PDAer only has a certain capacity for demands in a day. The size of their capacity depends on how much demand has happened in the days and weeks before, how anxious they feel about other things, and how much personal freedom they have been allowed recently. The demands of life take up some of this, so by the time they have washed and dressed, a PDAer with a small capacity might be done. The PDAer may choose not to do those things to give them capacity for things they would prefer to do. A PDAer can learn to regulate this capacity but must be allowed to do this freely, without suggestion. You can read more about this capacity here.

We often think of demands as "being told what to do", but actually, people and life can be demanding in many different ways. People compromise our freedom to self-direct in subtle ways as well as abvious ones, by trying to influence our choices, or by having expectations of us that we did not take part in. Expectations as demands can be real, or simply perceived by the PDAer. They can take the form of societal expectations, and expectations of themselves, as well as expectations from others. Furthermore, demand can take the form of reminders, suggestions, and recommendations.

The behaviours that PDAers will use to avoid demands can be equally extreme and pervasive and always include some social avoidance strategies. If a PDAer cannot avoid a demand, or the anxiety caused by the demands of life are too great, their anxiety will become too intense and they will end up in meltdown or shutdown, which can be extremely serious for both the PDAer and the people around them. A PDAer who is in a general state of anxiety may skip very quickly though the stages, or may immediately melt/shut down at the slightest hint of demand

Stage 1: Light avoidance
Excusing themselves
Stage 2: Strong avoidance
Retreating into fantasy or role play
Outrageous social behaviour
​Incapacitating themselves
Making excuses that seem ridiculous
Stage 3: Meltdown or Shutdown
Self harm (physical and emotional)
Verbal or physical abuse of others
Destruction of property
​Extreme exhaustion and inability to function
​Uncontrollable crying

*Please note that this Stage 3 behaviour is a panic attack and needs to be cared for as such.

3. Fantasy & role play

The third behaviour derived from the need for personal freedom is often down-played as “a possible feature of PDA that is potentially distinct from other autism profiles“.  Role play and fantasy mind-play is, from my perspective, a key factor in this neurotype. PDAers are very comfortable (often obsessively) in role play, or in their own personal fantasies (sometimes called day dreaming). I believe that as a direct result of the PDAer's need for personal freedom, they learn very quickly to retreat into their own personal worlds and characters that are entirely of their own making. This is something the PDAer has complete control over and within it, complete freedom. No external person has any control of this. If a PDAer chooses to role play with others, you will see them dominate the experience for the other person.

In Autistic people who do not have PDA, role play and fantasy may be something with which they struggle, or they may enjoy much more formal role play as adults, entering effectively into another society that has clearly defined rules that they understand, and are potentially not as difficult to navigate as our society, where the rules often change or are too subtle.

I believe this aspect to also be best described as pathological. This is because PDAers use role play in extreme and atypical ways in their everyday life. Here are the three most common ways that PDAers use role play or fantasy to survive with their neurotype.

Resistance, restoration and retreat

The PDAer will retreat into their own personal fantasies and role play in their mind to resist the demands of everyday life. They may also use a role or persona externally as a stage 1 social strategy to resist the demands of others. “No I am Elsa and Elsa doesn’t clear the table”.

PDAers will also retreat into a role or fantasy world to ease their anxiety and to try to make sense of social interactions they don't fully understand. This can restore balance and a sense of personal freedom.


The PDAer uses their comfort in role play to create a role or character in their mind that allows them to mask their difficulties from certain people or in certain places. This is an immense skill that can allow some PDAers to hide their struggles from society. This can be so pervasive that PDA is often missed or misdiagnosed and PDAers, especially those who are now adults, have a hugely disrupted sense of self. They often do not know who they are, other than as a series of roles that they play. It is key to understand that playing roles (masking) for any length of time is exhausting. PDAers who have been “in role” will need significant periods of rest with no demands to recover. If they do not get this, melt down or shut down are inevitable. In undiagnosed PDA adults, they will often be diagnosed with all kinds of mental health conditions, which will likely include some form of depression, anxiety or chronic fatigue. These roles can also be utilised by PDAers to cope with demand. For example, many adult PDAers describe things like pretending in their head they are on a cooking show, to enble them to cook dinner.

Stimulatory behaviour (stimming)

To the PDAer, the act of creating a world for yourself, creating a character for yourself in your mind, or fantasising about a particular interest, is in fact the most comforting sensation they could experience. When we understand that “stimming" is usually used as a self-soothing behaviour, we can see how role play could be a cognitive stim for the PDAer. It is definitely comforting.

PDA as part of the autistic spectrum

The reason that PDA is described as a part of the autism spectrum, rather than being its own neurodivergence, is that it not only shares those features commonly found with most neurodivergences (including ADHD, SLD, OCD etc), such as sensory and emotional regulation differences and executive function issues, it also shares the main definable traits of autism spectrum in its own way. These features do present differently in PDAers though, and I will describe these below and how the PDA neurotype differs from the norm, followed by the more general neurodivergent traits.

Social communication and interaction

One of the reasons that this was thought to be a different condition from autism originally, is that it was believed the the PDAer did not struggle with social communication and interaction. PDAers are often very social people, liking being around others and liked by people. PDAers are often charming, fun and exciting to be around, at least some of the time.

In more recent years it has been further observed that PDAers struggle with social communication but not in the same way as  autistic people who do not share this neurotype. Some professionals describe this as having “surface level sociability with a lack of deeper understanding” and although I can see how they came to this conclusion, I think this description may be misleading.

It appears to me that PDAers have, in most cases, a very astute understanding of human behaviour and a solid ability to understand what is happening for other people. I also believe that empathy usually scores very highly in the PDAer in much the same way as it does with ADHD, both in an emotional and a cognitive sense. However, it seems that the PDAer doesn’t always have the ability to put into practice complex social skills in a given moment. This means that, although surface level relationships and general social skills can be easy for the PDAer, especially if on their own terms, long-term relationships, or navigating complicated situations or dynamics, can be virtually impossible. I do not think this is always through a lack of understanding, or interpretation of others.

I can analyse the behaviours of others to a greater degree than most. I can observe social behaviour and understand the sub-text between two other parties, who have no idea of that. I can feel the feelings of others and the emotional energy in a room. But I often find myself in a situation in which I have clearly made a serious social error, and I could not explain to you what it was - An adult PDAer

“My friends think I am fun and they get excited about my ideas. Then they don’t like me or want to play. I don’t understand why” - A child PDAer.

PDAers appear to lack the ability to observe and respond to normal social boundaries due to having such a strong sense of themselves as deserving freedom. This makes a PDAer believe that they are, and should always be treated as, equal to everyone else. Whilst of course this is true and everyone should be, the rules of our society are quite different. There are common situations where one person, for example teachers, police officers and managers, are viewed as more important, wielding more power and influence. The PDAer will not only find any loss of control untenable, they will not understand why they are not able to freely challenge a person, regardless of their social status. They also won’t very much care, because these rules seem ridiculous. Child PDAers often expect to be included in adult spaces, and to be able to form friendships (or more) with adults, as if age had no impact.

In situations where there is a more socially equal footing, the PDAer may struggle socially because their need for freedom fundamentally overtakes their cognitive ability to read cues. The cues are there, and the PDAer might, on reflection, be able to read them, but in the moment their freedom to speak, to give their opinion, voice their idea or take control, is too strong. Afterwards there will potentially be shame at a mistake, and confusion because on reflection they may not be able to understand what happened due to being so caught up in their own free thinking.

This is one way that PDA is in some ways more similar to ADHD than Autism. People with ADHD struggle with social relationships, attributed to impulsive, hyperactive and inattentive communication, leaving people finding the ADHD person rude, thoughtless or uninterested, and leaving the ADHD person confused. I am not saying that PDA is actually a form of ADHD, or that it isn't a form of Autism, but that the way these neurotypes are categorised isn't perfect or simple.

Retricted and repetitive behaviour

PDAers may display restricted areas of interest like Autistic people, and may even be less inclined than other Autistics to do and discuss things outside of their field, due to this impinging on their personal freedom. Sometimes this might be less obvious in a PDAer due to the type of interests that they commonly pursue, and because they seem more likely to pursue more socially likely interests, and possibly change their area of interest over time, seeking novelty (especially if there is co-ocurring ADHD which statistically very common).

A PDAer’s area of interest is more likely to relate to people in some way. Whilst other Autistic profiles tend towards intense interest in "things" like creatures, vehicles, objects and places, the PDAer is more likely to fixate on emergency service people, super-heroes, fantasy characters, and individual people, either in person or as celebrities. This is a generalisation of course, and the examples above are illustrative rather than exhaustive.

PDAers can become fixated on one particular person at a time, feeling a need to be with them, think about them, and talk about them constantly. They may need to know everything about them and feel unusually upset if the person spends any time with anyone else, even if this is completely reasonable. This obsession isn't necessarily romantic in nature, but a PDAer may mistake obsession for romantic feelings. Fixation on a person can of course be negative too.

I have observed that, as well as commonly becoming fixated with particular people, adult PDAers have a greater tendency to be intensely interested in, and often study, human behaviour. This is commonly one of, or the, special interest of an adult PDAer. I believe that this stems from a high level of empathy, a need to “play roles” in order to cope with life, and a need to use social tools to avoid demands. PDAers accidentally study human behaviour in order to survive from a young age and so later in life, when they realise they actually understand humans pretty well, at least intellectually, they tend to want to learn more.

PDA and common neurodivergent traits

PDAers share the same issues with sensory and emotional regulation and with executive function as other neurodivergent people. In fact, there is some evidence that PDAers’ difficulties with both emotional regulation and executive function may be more evident than with other types of Autism; which may be due to the higher instance of the co-occurrence of ADHD. Executive function difficulties and emotional hyper-arousal are two hallmark features of ADHD.

Living with PDA

Read more about PDA from me:

I have also started writing regularly on specific topics surrounding PDA, whenever they come up in my studies, or more often, whenever I find myself answering many parents questions in support groups. Here are links to blog posts I have written on PDA.


What you may see from a PDA person at any age:

  • Taking control over their own lives by not conforming to given rules and expectations (even if the judgement for this hurts them). Examples include changing their given name, gender, doing things backward etc.
  • Taking or seeking control of the lives of others and any situation they can, though the intention is without malice, It usually comes from a place of trying to help the other party, or trying to be free.
  • Avoidance of demands and expectations to an extreme and widespread degree. This may mean they cannot do very normal things of which they are physically capable, and will not comply, even if they want to.
  • An appearance of lack of shame for extreme behaviour, though this is momentary and following an incident, shame will follow quickly and deeply.
  • Deriving great comfort in personal role play and fantasy, leading to an ability to mask their neurotype very effectively in certain situations.
  • A desire to be sociable, with an ability to engage very well with others for a time.
  • Exhaustion following social interaction.
  • Difficulty in perceiving and responding to social cues, even if they can see them.
  • Difficulty with social boundaries.
  • Difficulty in maintaining social relationships due to their need to be in control, their avoidance of demand and their struggles with social cues and boundaries.
  • Repetitive behaviour displayed often as fixation with another person, or people.
  • Restricted interest of an obsessive nature, over long periods that then moves on to another topic.
  • Rejection of planning and routine, with a general need for a rhythm in their lives of their own making.
  • Difficulty regulating their mood and emotions, reacting strongly to perceived or minor stimuli and threat.
  • Huge amounts of anxiety if their personal freedom is not abundant, leading to very challenging experiences and behaviours.

As a child, a PDAer may have (but not necessarily):

  • Been a passive baby/toddler, allowing things to be done for them more than others, or been incredibly demanding.
    Had some degree of language or communication delay but caught up quickly, or could have had very advanced language.
    Had difficulty maintaining friendships, whilst they may have made friends easily intitially.
    Been “obsessed” with people (usually one specific person at a time).
    Seemed impulsive.
    Disliked or heavily questioned rules, the status quo and being told they cannot do things.
    Displayed potentially very difficult, seemingly oppositional and defiant behaviour.
    Displayed high levels of anxiety.
    Displayed very different behaviour profiles in one setting than another.
  • Spect much of their time in role, or in fantasy.

Em's PDA graphics

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