My PDA Work

Over the last 15 years I have developed a clinical specialism in Pathological Demand Avoidance (PDA) which is now accepted to be a sub-type or subvariant of the Autism Spectrum.

My clinical assessment work has involved conducting face to face diagnostic assessments of children from 3 to about 14 years of age, in the youngster’s home or at my clinic in York.

Alongside my clinical practice, I have been engaged in research with parents of youngsters with PDA in order to develop and refine our understanding and insights about PDA. You can download a copy of my research presentation at Bath University here, which will tell you more about the Ex-PDA research project I completed in 2015.

I have also contributed to the debates and discussions around the nature of PDA. You can view a copy of my published letter in The Psychologist here.

My clinical work in PDA was recognised by Worcestershire Innovation in 2018.

For more information about my experience, qualifications and career you can download a copy of my full CV here.

We had A’s tribunal yesterday. We won (got what A is legally entitled to) and mostly got everything in his education package which A needs. We honestly can’t thank you enough for your amazing report and the preparation and care you put in that meant A could engage and you give such thorough recommendations. We were elated yesterday – as was A. He said ‘I’m free!!’ when we told him. Thank you again Hilary

Mrs McS (mother of A)

August 2025

Parents often say “can you recommend an EP” and you’re always at the top of my list.

Ken Upton, MBE

Independent SEND Advocate

February 2025

Oh Hilary - thank you so much. I can't express in words how important what you have done for families like ours is. I will never forget the moment we spoke on the phone for the first time and how it felt to speak to a professional who just totally got it. I literally came off the call, cried and then called my Mum to tell her I had found my (and A's) tribe. Your report is beyond anything we could have imagined.

Mrs M

November 2024

Thank you so much for the report, it is amazing, really interesting. The way the questionnaires is set out is really impactful.

Mum, L

September 2024

Dear Hilary, Thank you for sending your report - we couldn’t be more grateful for the care and attention you have taken to understand T and what she needs. It is hard to read some of the information it contains, but it is also empowering to experience your validation of her unique set of strengths and challenges.

S & A parents of T

September 2024

Hilary, your report is a real testament to your dedication to ensuring children (and families!) living with PDA, are much better understood. We are confident the report will go on to have a tremendous impact. After your efforts during some long and difficult months here, we are feeling very grateful (and relieved) to be able to return to tribunal in April much more reassured of our position.

Dr E-G

February 2025