Opinion: Highly Sensitive Person (HSP) and High Functioning Autism Are the Same - BRIGID Magazine

Thursday, December 6, 2018

Opinion: Highly Sensitive Person (HSP) and High Functioning Autism Are the Same

Women with high functioning autism often go undiagnosed or misdiagnosed
until well into adulthood. Some experts say this is due to their ability to mask
symptoms and imitate others. Current diagnostic criteria do not fully capture
the ways autism manifests in females. | Image: Larm Rmah
Elaine Aron coined the term "Highly Sensitive Person" or HSP to describe someone with a unique cluster of emotional, physical, and sensory sensitivities.

Her description has led many to wonder about the similarities between HSPs and those on the high functioning end of the autism spectrum. Aron's responses appear to consider autism in men, but do not show awareness of autism as it presents in women. In fact, the description of someone who is Highly Sensitive sounds a lot like the description of a woman with high functioning autism or Asperger syndrome. For this reason, the spread of information about HSPs could be one of several factors responsible for delayed diagnosis.

If someone believes they are an HSP or believes their child is an HSC (Highly Sensitive Child), they will assume that certain difficulties or problematic behaviours are related to the HSP trait and will be less likely to search for other answers — namely, an autism diagnosis.

Aron defines HSP, or sensory processing sensitivity, as a trait existing in 15 to 20 percent of the general population. Those who are HSP are more aware of subtleties in their surroundings, tend to be introverted, are easily overwhelmed, and are usually more comfortable alone than in large groups or crowds.

The "Are You Highly Sensitive?" checklist on Aron's website includes items such as:


  1. I am easily overwhelmed by strong sensory input.
  2. Other people's moods affect me.
  3. I find myself needing to withdraw during busy days, into bed or into a darkened room or any place where I can have some privacy and relief from stimulation. 
  4. I am particularly sensitive to the effects of caffeine. 
  5. I am easily overwhelmed by things like bright lights, strong smells, coarse fabrics, or sirens close by. 
  6. I am deeply moved by the arts or music. 
  7. My nervous system sometimes feels so frazzled that I just have to go off by myself. 
  8. I get rattled when I have a lot to do in a short amount of time. 
  9. I am annoyed when people try to get me to do too many things at once. 
  10. I become unpleasantly aroused when a lot is going on around me. 
  11. Changes in my life shake me up. 
  12. I make it a high priority to arrange my life to avoid upsetting or overwhelming situations. 


The checklists for women on the high functioning end of the spectrum (see here and here) overlap on every single one of the 27 HSP checklist items.

The Invisible End of the Spectrum


Aron has clearly received a lot of questions, comments, and concerns about the similarities between the Highly Sensitive Person trait and autism spectrum disorder, including, she says, from "concerned parents" who suspect that their Highly Sensitive children might actually have autism. She has written a FAQ section for this specific topic, where she seeks to explain reasons for the confusion:

Both HSCs and those with the [autism spectrum] disorder are bothered by overstimulation. Plus both may withdraw from social activities and stay in their rooms on the computers, watching movies, and so forth. 

She then lists two autism spectrum disorder (ASD) symptoms from the DSM that are not, she claims, part of being Highly Sensitive: 1) highly restricted, fixated interests, and 2) hyper- or hypo reactivity to sensory input or unusual interests in sensory aspects of the environment.

To present these symptoms in apparent contrast with HSP, she describes more severe presentations of autism — presentations that are decidedly more male. Females with high functioning autism tend not to have as highly restricted or fixated interests as males. They tend to have broader interests that can come and go, and can include what most think of as regular or mainstream interests, like makeup, art, fashion, or celebrities.

At one point, Aron writes, "HSPs have intense imaginations and varied interests rather than narrow preoccupations" — a distinction that betrays an overused and cliched view of autism.

"It is a gross misconception that people with Aspergers have no imagination," writes Rudy Simone, author of "Aspergirls." "A great number of writers, directors, artists, more inventive engineers are on the spectrum. ... Psychologists who have observed kids with AS have labeled them as unimaginative, simply because they were not playing as society expects to see children play and have subsequently misunderstood what they've observed."

Regarding hyper- or hypo-reactivity and the interpretation of social cues, Aron writes:

So those on the autistic spectrum have hyper reactivity, but also hypo reactivity at other times or in other situations. This is due to problems in properly processing information social and otherwise. They fail to sort it out, so it is all there, all the time, or totally shut out. In contrast, HSPs and HSCs process information very carefully. We can become overstimulated if there is too much for too long, but we do not become fixated in an extreme way or unable to shift to other stimuli according to the needs of the moment. Above all, we can read social cues, unless we are overaroused in the moment by being overstimulated. ... Those with an ASD are always processing the wrong things and always experiencing chaos unless they are able to shut themselves off from the world entirely.

Women with high functioning autism or Asperger syndrome tend to process social information more accurately than men on the spectrum, or at least they can become quite adept at navigating social situations, so again Aron is describing a male presentation of more severe autism, and failing to address higher functioning forms of ASD. These higher functioning forms tend to fly under the radar of diagnosis, especially when seen in females. Some have called this phenomenon the invisible end of the spectrum.

And as Tony Attwood, one of the world's foremost autism experts, explains (after describing the top two ways that children with Asperger syndrome respond in social situations):

There's a third group that's not in the diagnostic criteria, which is how the girls [with Asperger syndrome] cope. ... What she does is observe, analyze, and imitate — to fake it till you make it. She has a mask, a facade, that makes her highly successful in what she does [socially], but it's a fake. It's done by intellect, not intuition.

This imitation and faking is not done to purposely dupe or deceive, but is done as a means of fitting in. And since the girl begins this behaviour at a very young age, long before she is ever aware of autism or of the distinction between "neurodiverse" and "neurotypical," she may assume that this is what all children must do to fit in. This is what it must mean to belong. She may eventually learn that she is different somehow, but this will make her try even harder to "get it right." And so might begin a lifelong trend of pretending to be normal, of suppressing her true self, for fear that others will judge her as not one of them.

The Stereotypical View of Autism


Elaine Aron's discussion of her grand-nephews, whom she misdiagnosed with HSP but later turned out to have autism, is even more telling:

No one who loves a child or their parents would want to think about autism, even when the child in question will eat only exactly three kinds of food or is happy for twenty minutes merely watching a bicycle wheel spinning.

Aron's conception of autism, at least as evidenced in the FAQ section of her website, does not reach beyond more severe forms of ASD (which also happen to be what most people think of when they think of autism). Very few of those on the high functioning end of the spectrum could relate to Aron's description of her grand-nephews. Many of those on the high functioning side have behaviours and tendencies that are so close to "normal" that they are often misdiagnosed or undiagnosed for much of their lives. This is a particularly common experience for women on the spectrum.

In fact, it was once thought that the ratio of males to females with autism was 4:1. New research has shown that it's actually closer to 2:1. The numbers may turn out to be more equal than that.

Elaine Aron succeeds in detailing the difference between HSP and what the DSM 5 would call level 2 or level 3 autism spectrum disorder, but she neglects to consider that the HSP trait that she coined may describe elements of high functioning autism or Asperger syndrome (what the DSM 5 would call level 1 ASD), especially as displayed in females.

Aron's mistake is an understandable one, since research on the female autism phenotype is still in its infancy — with research failing to keep up with clinical findings. Word is really just starting to get out about the differences between males and females with autism. And so much more work still needs to be done.

by Kristen Hovet

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