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Resource Guide

Pathological Demand Avoidance (PDA) Explained

September 14th, 2023

Sarah Taylor

For Caregivers, Educators, Autistic Adults



Important note: This article contains information on a developing topic. PDA is not currently recognised as a diagnosis in Canada and is not included in the DSM-5 assessment criteria. The information in this blog is from emerging research done abroad, mostly in the UK. We strive to empower our community with vetted knowledge and provide a safe space for discussions on highly-requested topics like this one.

Pathological Demand Avoidance (PDA) is an autistic profile. PDA individuals share autistic characteristics and also have many of the ‘key features’ of a PDA profile. It is most widely recognized in the UK. PDA is best explained as an extreme avoidance of everyday activities, refusal of demands and challenges with authority due to severe anxiety. In the United States and Canada, PDA is still emerging and not widely diagnosed by professionals due to lack of awareness. 

The PDA profile differs from typical autism traits, and the extreme avoidance extends to basic demands of everyday living, such as dressing, eating, and going to school. PDA is seen in both genders equally, although there are no estimates available as studies on PDA are lacking. Because PDA is still being studied, it is often misdiagnosed as other conditions that look similar on the surface. Missed diagnosis or misdiagnosis is especially common for autistic girls and women who fit the PDA profile (, 2022).   


An infographic listing the characteristics of the pathological demand avoidance profile
Core Features of the Pathological Demand Avoidance (PDA) Profile
Core features of the PDA profile:   
  • Resists demands of everyday life  
  • Need for autonomy and control   
  • Might resist preferred activities   
  • Might be a passive, watchful observer in the first year  
  • Use of fantasy as an escape or to avoid demands  
  • Sensory differences, including sensory seeking or avoidance  
  • Impulsivity or difficulty with self-regulation  
  • Special interests, which may be a person, either real or fictional  
  • Detailed pretend play and role play  
  • Meltdowns or shutdowns from anxiety 


What is PDA?
Image credit:
Image credit:

PDA is best supported within a multi-pillar approach. Areas of need include sensory support, help with identifying emotions or managing anxiety, and support with speech and communication. Because preservation of autonomy is crucial for PDA individuals, approaches that support autonomy, agency, and self-advocacy are most helpful (, 2023). Professionals who are often involved in the assessment and support of individuals with PDA include:  

  • Speech and language therapists  
  • Physiotherapists  
  • Occupational therapists  
  • Psychologists  
Helpful approaches for a PDA profile of autism
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“Learning about PDA completely changed my life. It explained why parenting was always so challenging with my son, why he is irritable over nearly everything, why he is no longer attending school (although he always got good grades), why he rarely wants to leave the house and why he avoids conversations about his life. I learned that this was not due to my parenting which I had really started to question, and that there are many others who struggle like my son. In order to provide a safe environment for my son, I have had to transform my parenting style. Learning how to create a low-demand lifestyle has been a game changer for us and I can see my son slowly reintegrating back into our family. PDA is not easy to live with, but understanding the feelings behind it really goes a long way. We all have so much more to learn.” – Anonymous community member  

Ways to Support: 
  • Provide a flexible and adaptable approach that is constantly in sync with the person’s anxiety levels.   
  • Redirect your demand as a statement  
  • Monitor stress levels and lower demands when needed  
  • Create safe spaces when the individual becomes overwhelmed  
  • Give plenty of time for morning and evening routines  
  • Give choices to allow the individual more autonomy   

Using declarative language is a positive way to lower demands. Using sentence starters such as “I wonder if we can…” “Let’s see if we can make something…” “I can’t see how to make this work…” “Maybe we could investigate…” “How do you want to help us today…” instead of direct language such a “It’s time for you to…” “You’ve got to…” “You need to…” “You must…” This can help alleviate anxiety and remove pressure from the individual.   

If you feel you or your loved one may fit the PDA profile and would benefit from support, reaching out to professionals who are familiar with the profile is a good starting ground. Connecting with like-minded peers can also be extremely helpful. For autistic adults our Getting Together on the Spectrum Meet-up Group is a great place to start.  

See below for additional resources:  

Introduction to PDA: Pathological Demand Avoidance 

Autism Awareness Centre: An Introduction to PDA 

PDA Society 

Positive PDA Booklet 

PDA North America 

Pathological Demand Avoidance & autism | Embrace Autism ( 

PDA Parenting Solutions 

Facebook Group: Canadian PDA 

Extreme Demand Avoidance Questionnaire for Adults 

Life Hacks for PDA Adults 

A-Z of Demands – Notes on PDA ( 

PDA Books 

PDA Society Simple Support Strategies for a PDA profile of autism 

Declarative Language 

PDA – A Guide for Autistic Adults   

Kristy Forbes – Autistic/PDA Advocate  

PDA Questionnaire 

What learning about PDA meant to me 

I’m Pathologically Demand Avoidant-It Rules  

 The EDA-8 – Embrace Autism ( Extreme Demand Avoidance 8-item measure (EDA-8) is a parent-administered questionnaire that measures traits and behaviours related to Pathological Demand Avoidance (PDA) in children (ages 5–17). 

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