The obsessive interests of girls often aren't recognised as a symptom. (Alberto Ortega/Europa Press via Getty Images)

“Let’s go to page seven,” says the psychologist.
I flick through the papers on my lap. There it is, at the bottom: “Autism, without accompanying intellectual impairment and without accompanying language impairment.” I read that I fulfil all seven diagnostic criteria for what used to be known as Asperger’s Syndrome. In fact, on one of the rating scales where a score of more than 77 points supports a diagnosis, I come in at 154. I feel I’ve done well, by being such a clear-cut case.
Then, my past unfolds. It’s like watching a film with a twist at the end. The signs were there all along: literal thinking, obsessive interests, anxiety, struggles with change. I have always known that I’m autistic. And yet, I haven’t had a clue.
The assessment that led up to my diagnosis lasted for three months. The psychologist interviewed me and spoke to my close family; I did tests and filled out questionnaires. The self-report inventories were a little antiquated in their view on autism, the psychologist told me apologetically. He was right. The questions were based on stereotypical male interests, such as playing boardgames, noticing number plates on cars, or collecting information about different categories of trains.
I envisioned the person whom the questionnaire was aimed at: an anaemic male gamer who rarely leaves his apartment, collects soda cans, can solve a Rubik’s cube in under a minute and monotonously drones on and on about the Cretaceous period. I thought about male geeks in popular culture, characters in TV shows like The Big Bang Theory or Atypical.
Until the Nineties, autism was regarded as a condition mostly found in boys — simply because all the early scientific research on autism was done on boys and men. This gender imbalance meant the diagnostic tools established were skewed. Doctors such as Hans Asperger noted that the boys he examined had limited, strong interests, and came to the conclusion that this was an autistic trait. Therefore, only “boyish” special interests came to be associated with autism.
In 1992, the Swedish child psychiatrist Svenny Kopp — one of the first authors to write a scientific article arguing that there were more autistic girls than previously believed — noticed that if a girl was obsessed with, for example, My Little Pony, her male colleagues wouldn’t recognise this as an autistic special interest. Instead, the girls were given other, less specific diagnoses like Semantic Pragmatic Disorder or “learning difficulties”. Autism was only recognised in a girl if the case was very severe.
Medicine did ask itself, at the time, why there seemed to be no girls with so-called “high-functioning” autism — that is, autism without accompanying intellectual impairment. The explanation, doctors decided, was that girls must have to experience a more extensive brain injury, a more profound intellectual disability, before they could develop autism. But Svenny Kopp didn’t buy it. Being female herself was pivotal to her scepticism, she says today. Her ground-breaking thesis, “The Girl Project”, showed that not all autism looks like the kind observed in boys. She is currently conducting a follow up-study of the girls she worked with in the Nineties, who are all now around 35. Her work has received an incredible amount of attention — and offered salvation to many autistic women.