The CAT-Q Test: Measuring Autistic Masking and Camouflaging
This one is different from every other instrument on this site. It does not screen for autism. It measures how hard you are working to hide it.
Most autism questionnaires ask what you are like. The CAT-Q Test asks what it costs you to appear the way you do. That distinction sounds small. It is the single most useful idea in adult autism assessment, and it explains more missed diagnoses than anything else.
If you have taken an autism screener, scored lower than your own experience suggested you should, and walked away confused, this is the instrument that was missing.
What is the CAT-Q Test?
The CAT-Q Test, properly the Camouflaging Autistic Traits Questionnaire, was published in 2019 by Laura Hull, Will Mandy, Meng-Chuan Lai, Simon Baron-Cohen and colleagues. It contains 25 statements, each rated from 1 to 7, from strongly disagree to strongly agree. Totals run from 25 to 175.
Camouflaging is the term researchers use for the strategies people use to hide or compensate for autistic characteristics in social situations. Some of it is conscious. A great deal of it is not.
The instrument splits that behaviour into three parts.
Compensation
Actively working around social difficulty. Studying how other people hold conversations. Copying gestures and expressions from film or television. Learning rules for eye contact rather than doing it instinctively. Preparing topics before a social event.
Masking
Suppressing behaviour that might look unusual. Holding still instead of stimming. Monitoring your own face. Keeping your voice in a register you have decided is acceptable. Performing a version of yourself rather than being one.
Assimilation
Pushing through social situations that do not feel natural, in order to fit in. Attending things you would rather avoid. Feeling as though you are acting a part. This subscale tends to be the one most closely tied to distress.
Published descriptions of the CAT-Q Test disagree about how many of the 25 items sit in each subscale, which tells you something about the quality of secondary sources on this topic. The three-factor structure itself was confirmed in the original validation and holds across gender and diagnostic group.
How the CAT-Q Test is scored
Scoring the CAT-Q Test is straightforward. Add the item ratings. Reverse-scored items are flipped first. Higher totals mean more reported camouflaging.
Then comes the part that is routinely misreported online. There is no diagnostic cutoff. None. The authors did not publish one, because the instrument is not a diagnostic tool and a threshold would imply it was.
What exists instead are reference points from the validation sample of 354 autistic and 478 non-autistic adults.
| Group | Approximate mean total |
|---|---|
| Autistic adults | 124 |
| Non-autistic adults | 97 |
The useful reading is comparative rather than categorical. A total well above 124 says you report more camouflaging than most autistic adults in the validation sample. A total around 97 says you report about as much as the average non-autistic adult. Neither statement is a diagnosis of anything.
Why the CAT-Q Test matters more than its length suggests
The CAT-Q Test exists because every self-report autism screener has the same structural blind spot. It asks how you are. It cannot see the machinery.
Consider someone who has spent thirty years building an elaborate system of rules, rehearsals and borrowed mannerisms, and who now passes comfortably in most conversations. Asked whether they find social situations difficult, they can answer honestly that they manage. The AQ-50 Test scores that as a non-autistic response. Thirty years of engineering is invisible to it.
This is not a hypothetical. It is the main reason adult screeners underperform for women, and the main reason late diagnosis happens at all. A low score on an autism questionnaire combined with a high score on the CAT-Q Test is a recognisable and meaningful pattern. It is roughly the opposite of reassuring.
The exhaustion finding
Research since 2019 has repeatedly linked higher camouflaging to worse mental health: anxiety, depression, lower wellbeing, and what the autistic community calls burnout. The associations are consistent.
Two cautions. These are correlations, not demonstrated causes. And camouflaging is not uniformly harmful. For some people in some settings it is a functional skill that makes work and relationships possible. The research does not say stop masking. It says masking has a cost, and the cost is worth knowing about.
Who the CAT-Q Test is for
The CAT-Q Test is written for adults aged 16 and over. You do not need a diagnosis to take it, and you do not need to be autistic for the result to mean something.
It is most informative in three situations. If you scored lower on an autism screener than your experience suggested. If you are a woman, or gender diverse, and suspect you have been missed. If you are already diagnosed and trying to understand why social contact leaves you so depleted.
It is a poor fit if you are looking for a yes or no about autism. The CAT-Q Test will not give you one, and a high score on its own is not evidence of autism. Non-autistic people camouflage too, particularly people with social anxiety.
Strengths and weaknesses of the CAT-Q Test
Strengths
- Captures the single biggest reason adult screeners miss people
- Excellent internal consistency, with alpha of 0.94 in the development sample
- Three-factor structure confirmed and equivalent across gender and diagnostic group
- Especially informative for women and late-diagnosed adults
- Explains a low score on other instruments better than those instruments can
- Short. Around five minutes.
Weaknesses
- Not a screening tool, and a high score is not evidence of autism
- No validated cutoff, which has not stopped websites inventing one
- Requires self-awareness about behaviour that is often automatic
- Non-autistic people, especially socially anxious ones, also score highly
- Test-retest reliability of 0.77 is described by its own authors as preliminary
- Only meaningful alongside another measure
Controversies around the CAT-Q Test
The invented cutoff
The figure of 100 appears on dozens of CAT-Q Test pages as though it were published. It was not. Given the non-autistic mean of 97, treating 100 as a threshold would classify roughly half of all non-autistic adults as significant camouflagers. If a site gives you a pass or fail on this instrument, it has made the threshold up.
Whether it measures camouflaging or distress
The assimilation subscale in particular overlaps conceptually with social anxiety. Forcing yourself through social situations that feel unnatural is a reasonable description of both. Some researchers argue the instrument captures a broader construct of effortful social performance, of which autistic camouflaging is one variety.
Self-report of unconscious behaviour
There is an inherent tension in asking people to report on strategies they may run automatically. The instrument measures camouflaging that you can see yourself doing. Whether that is the same as camouflaging is an open question.
Does measuring it help?
A minority view holds that instruments like the CAT-Q Test, by drawing attention to masking, can make people self-conscious about behaviour that was working for them. The more common clinical position is that naming it gives people a choice they did not previously know they had.
How the CAT-Q Test compares to other instruments
| Instrument | What it measures | Gives you |
|---|---|---|
| CAT-Q Test | Effort spent appearing non-autistic | A camouflaging profile, no autism verdict |
| AQ-50 Test | Current autistic traits | A trait score across five areas |
| AQ-10 Test | Current autistic traits, briefly | A referral decision |
| RAADS-R Test | Lifetime autistic traits | A score across four areas, childhood included |
| RAADS-14 Screen | Lifetime traits, briefly | A fast psychiatric-setting screen |
| ADOS-2 Test | Observed behaviour | Clinician-rated diagnostic evidence |
| ADI-R Test | Developmental history | Informant-reported diagnostic evidence |
| M-CHAT Screening Test | Toddler behaviour | A parent-reported risk band |
The pairing that produces the most information is this instrument alongside a lifetime-format autism screener. The RAADS-R Test asks about your whole life rather than your present, and a moderate score there combined with a high camouflaging score tells a coherent story that neither tells alone.
If you want to look beyond autism, our Neurodivergent Test screens seventeen conditions and reports impact separately from traits. For something quicker and autism-specific, the Free Autism Test takes about six minutes.
Frequently asked questions about the CAT-Q Test
What is a high CAT-Q score?
Autistic adults in the validation sample averaged around 124 and non-autistic adults around 97. Above 124 is high relative to autistic respondents. There is no official threshold, and any site offering one is improvising.
I scored high. Does that mean I am autistic?
No. It means you report putting substantial effort into appearing a certain way socially. Plenty of non-autistic people do, particularly people with social anxiety. The result is informative alongside an autism measure, not instead of one.
I scored low but I am sure I mask. How?
This is common and it is the most interesting result the instrument produces. If you have camouflaged since childhood, the strategies may not feel like strategies. You are not performing, in your own experience. You are just talking to people. The questionnaire can only measure what you can see.
Can the CAT-Q Test diagnose autism?
No, and it was never intended to. It is a measure of one behaviour, not a screener for a condition. Diagnosis involves a clinician, a developmental history and instruments like the ADOS-2 Test and ADI-R Test.
Why do women score higher?
Autistic women and gender diverse people reported notably higher camouflaging in the original research. The usual explanation is social expectation: girls face stronger pressure to be socially fluent and are given less latitude for difference, so the compensatory strategies start earlier and run deeper. This is also the leading explanation for later diagnosis in women.
Is masking bad for you?
The research consistently associates higher camouflaging with anxiety, depression and lower wellbeing. Those are correlations. Masking is also, for many people, what makes a job or a relationship workable. The useful question is not whether to mask but where the cost is landing, and whether there is anywhere you could stop.
How long does the CAT-Q Test take?
About five minutes for 25 items. Answer on instinct. Items about automatic behaviour get less accurate the longer you deliberate.
What is the difference between compensation, masking and assimilation?
Compensation is building workarounds, such as scripts and studied gestures. Masking is suppressing what might look different, such as stimming or facial expression. Assimilation is forcing yourself into situations to fit in. Assimilation is the subscale most strongly linked to distress in the literature.
Is the CAT-Q Test free?
The instrument is freely available for research and personal use, and the original paper is open access. You should not have to pay to take it.
Should I take it before or after an autism screener?
After. Its value lies in interpreting the other result. Take a lifetime-format instrument such as the RAADS-R Test first, then take this to see whether a moderate score there needs reinterpreting.
Can I show my result to an assessor?
Yes, and it is one of the more useful things to bring. Assessors are well aware that masking suppresses questionnaire scores, and a documented camouflaging score gives them something concrete. Bring examples too. “I rehearse phone calls in the shower” lands harder than a number.
Does masking explain why I am exhausted?
It may be part of it. Sustained social performance is effortful in a way that is invisible from outside, which is why the exhaustion so often goes unexplained and unbelieved. That said, exhaustion has many causes worth ruling out first, including sleep problems, thyroid issues and depression.
What the CAT-Q Test cannot tell you
Three limits are worth stating plainly, because the enthusiasm around this instrument has outrun its evidence base in places.
It cannot tell you whether you are autistic. That is not a flaw. It is the design. The authors built a measure of one behaviour and were explicit that it does not screen for a condition. Anyone presenting a camouflaging score as an autism result has misunderstood the instrument.
It cannot separate autistic camouflaging from the effortful social performance that socially anxious people also do. Both groups study conversations, rehearse openings and monitor their own faces. The questionnaire sees the effort. It cannot see the reason behind it.
And it cannot measure what you have never noticed. Everything here depends on introspective access to behaviour that frequently runs below awareness. A person who learned at six to copy other children and has never stopped may answer the whole questionnaire honestly and score unremarkably.
Those three limits do not make the CAT-Q Test useless. They make it one input among several, which is exactly how the authors framed it.
What the research has added since 2019
Work published since the original validation has gone in three directions. The first examined the link between camouflaging and mental health, and has broadly confirmed it across independent samples. The second looked at whether camouflaging explains the diagnostic gap between men and women, with mixed but generally supportive results. The third, and the least settled, has asked whether camouflaging is one thing at all, or a label attached to several different behaviours that happen to look similar from outside.
That third question matters for interpretation. If compensation, masking and assimilation turn out to have different causes and different consequences, a single total score from the CAT-Q Test would be the wrong way to read the result, and the subscale pattern would carry the information instead.
What to do with your result
If you scored high and you have also scored moderately on an autism screener, that combination is worth taking to a professional. Say both numbers out loud and explain what the second one means, because not every clinician will know.
If you scored high and have no particular suspicion of autism, consider social anxiety. It produces similar scores and it responds very well to treatment, which makes it worth ruling in or out rather than leaving.
And if the questions themselves felt like a description of your daily life that nobody had ever written down before, that reaction is reported often enough to be worth saying plainly. It is not evidence of anything on its own. It is a reason to keep going.
Sources
- Hull L, Mandy W, Lai MC, Baron-Cohen S, Allison C, Smith P, Petrides KV. Development and validation of the Camouflaging Autistic Traits Questionnaire (CAT-Q). Journal of Autism and Developmental Disorders, 2019;49(3):819-833. DOI · PubMed. The development and validation paper, open access.
- Hull L, Petrides KV, Allison C, et al. “Putting on my best normal”: social camouflaging in adults with autism spectrum conditions. Journal of Autism and Developmental Disorders, 2017;47(8):2519-2534. DOI. The qualitative study the instrument was built from.
- Lai MC, Lombardo MV, Ruigrok AN, et al. Quantifying and exploring camouflaging in men and women with autism. Autism, 2017;21(6):690-702. DOI. On sex differences in camouflaging.
- Ashwood KL, Gillan N, Horder J, et al. Predicting the diagnosis of autism in adults using the Autism-Spectrum Quotient (AQ) questionnaire. Psychological Medicine, 2016;46(12):2595-2604. DOI. Why self-report autism screeners miss so many people.
Search the literature yourself
- PubMed: autistic camouflaging and mental health and camouflaging, women and late diagnosis.
- Google Scholar: CAT-Q validation studies.
- Autism Research Centre, University of Cambridge. One of the groups behind the instrument.
- University College London, where Laura Hull and Will Mandy carried out much of this work.
- Wikipedia: Autism masking. General background on the concept.