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Pathological Demand Avoidance Syndrome (PDA) was first described in the 1980s, by Elizabeth Newson, and is an Autistic Spectrum Disorder related to, but significantly different from, 'standard' autism and Asperger's syndrome, and is increasingly becoming recognised as part of the autism spectrum

Specifically,
people with PDA will avoid demands made by others, due to their very sudden, and usually high, anxiety levels when they feel that they are not in control.

This PDA Resource website links to various recommended websites, Facebook pages, blogs, documents, graphics, & videos etc. and gathers together the best available information surrounding PDA, from sources around the world, to help parents, carers, professionals and others have a better understanding of PDA, and to provide help and support for people dealing with the condition.