@SamFellowesHPS I think from those advocating PDA as an ASD, are referring to the entire autistic population, which confusingly includes any non-autistic persons with PDA. So I think they view it a bit like this. 
@SamFellowesHPS That PDA is dimensional, perpendicular to autism severity/ functioning (yes I know this is a false dichotomy & flawed conceptualisation of autism).
@SamFellowesHPS Sorry, you should want this image.
@SamFellowesHPS The reason being for this, is that they PDA to be autism as on a behavioural level, it has RRBIs & social communication issues. They ignore issue of non-autistic persons with PDA in research samples, presumably because they them as being autistic due to PDA.
@SamFellowesHPS I do not agree with that logic for many reasons.
Moving on there is some research indicating that PDA presents at consistent level across the autistic population, if you look at severity/ functioning.
Moving on there is some research indicating that PDA presents at consistent level across the autistic population, if you look at severity/ functioning.
@SamFellowesHPS We know that they know that PDA contains non-autism features like anxiety, and conduct problems etc etc. It is problematic just squeezing PDA between/ adjacent to LFA/ HFA based on severity. It seems to fit best perpendicular to severity/ functioning.
@SamFellowesHPS Can people note I have graded the colours for autism & PDA based on severity. I placed PDA below autism, due to non-autistic features & non-autistic persons with PDA.
@SamFellowesHPS It is not a perfect diagram. It is the best I can come up with short notice. I would welcome feedback on it.
@SamFellowesHPS I am referring to dimensionality in the entire human population. Which to me makes sense. The DSM-5 is clear that narrow categories do not align with how human presents. Most Disorders present as a spectrum. That human presentations are dynamic over time.
@SamFellowesHPS *presumably because they view PDA to be autism*
@SamFellowesHPS This is my issue with saying PDA is dimensional. One of the most replicated results is that PDA is seen in non-autistic persons. Many experts say PDA is seen in non-autistics. Many papers discuss how PDA features are seen outside of autism.
@SamFellowesHPS O'Nions in her PhD thesis acknowledges seeing mild PDA presentations. Gillberg predicts PDA is a common, new Disorder. Help4Psychology "Rational Demand Avoidance" (which I view to be PDA, due to many reasons).
@SamFellowesHPS Considering we know that all attempts to create stable autism subtypes have failed, with this other information. It just seems ludicrous to say PDA is "dimensional" to autistic persons, when ignoring it apparently is dimensional in entire human population.
@SamFellowesHPS Especially, when dx threshold for a generic Disorder is substantially lower than some have for PDA, it is around the "Rational Demand Avoidance" group/ EDA-Q threshold.
@SamFellowesHPS "the disturbance causes clinically significant distress or impairment in social, occupational, or other important areas of functioning.“ (APA 2013, p21).
@SamFellowesHPS “…start to display avoidant behaviour and challenging behaviour in response to a particular stressor…” (Eaton 2018, p20).
Around EDA-Q threshold “problematic demand avoidance” (O’Nions et al 2018b)."
Around EDA-Q threshold “problematic demand avoidance” (O’Nions et al 2018b)."
@SamFellowesHPS I am not really a fan of using a spectrum concept, we know from autism, it tends to be used as a one dimensional swingometer. I prefer a concept of a manifold, as advocated by Ian Hacking.
@SamFellowesHPS It is sometimes worthwhile to use accepted language on a concept like a spectrum. Although, as I said I think a manifold is better representation of human nature, which is probably why it works better for autism than spectrum (because we are fully human...).
@SamFellowesHPS @SamFellowesHPS I have tried to collate all my responses into one thread for ease of reading.
@threadreaderapp please could you unroll?
@threadreaderapp please could you unroll?
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