1. Sensory traits
- Fluorescent lights uncomfortable or actively painful
- Specific sounds intolerable (chewing, ticking, sudden noise)
- Clothing tags, seams, or specific fabrics unbearable
- Narrow clothing range you reach for repeatedly
- Strong reactions to certain smells (perfumes, cleaning products)
- Narrow food range, particular textures avoided
- Heat or cold sensitivity beyond what others experience
- Crowded noisy environments exhausting
- Sensory-seeking behaviours (deep pressure, crashing, jumping)
- Doesn’t notice being injured until later
- Doesn’t feel hunger, thirst, or toilet needs until urgent (interoception)
- Bright sunlight uncomfortable; squints frequently
- Particular about which textures touch the skin
- Sound-cancelling headphones a daily-life tool
- Specific home environment needed for comfort
2. Social and communication traits
- Eye contact effortful, painful, or actively avoided
- Social interaction exhausting; needs significant recovery time
- Better in one-to-one than group conversation
- Difficulty with small talk and casual chitchat
- Deep engagement on substantive topics
- Literal interpretation of language — sarcasm, metaphor sometimes miss
- Strong sense of justice and fairness
- Difficulty reading implicit social rules
- Scripting conversations in advance
- Reviewing conversations afterwards for hours or days
- Intense engagement with chosen friends
- Difficulty maintaining broader social networks
- Communication described as “intense”, “direct”, or “too much”
- Info-dumping when interested in a topic
- Misreading social cues, then realising afterwards
- Strong distress at conflict
- Preference for written communication over verbal
3. Cognitive traits
- Monotropic attention — deep focus, difficulty switching
- Strong pattern recognition
- Systems thinking
- Need for clear rules and structure
- Distress at unexpected changes
- Better with detail than broad generalisation
- Excellent memory for specific topics of interest
- Strong logical decision-making
- Difficulty with ambiguous or implicit demands
- Tendency toward perfectionism
- Black-and-white thinking patterns
- Rumination and overanalysis
- Strong ability to focus when interested
- Difficulty with multitasking
4. Emotional traits
- Intense emotions that surprise others
- Difficulty regulating during sensory overload
- Hyperempathy with people you care about
- Strong attachment to people and topics
- Joy through special interests at unusual depth
- Rejection sensitivity
- Slow emotional recovery after distressing events
- Sometimes alexithymia — difficulty identifying feelings in the body
- Chronic anxiety often present
- Depression episodes
- Strong emotional response to fictional content
- Difficulty performing emotions you don’t feel
- Crying in unexpected situations
- Meltdowns or shutdowns under sustained load
5. Routine and predictability traits
- Strong preference for routine and predictability
- Anxiety when plans change unexpectedly
- Same breakfast, same coffee, same patterns
- Sleep patterns require specific conditions
- Travel disruption costs days of recovery
- Difficulty with transitions between activities
- Stim or fidget to manage routine variation
- Specific home environment carefully arranged
- Resistance to unexpected social demands
- Need for advance notice on changes
Recognising yourself?
Take the ND self-screen
If multiple sections of this checklist describe you, the structured self-screen is the natural next step.
Start the self-screen6. Interest traits
- Intense focused interests pursued at unusual depth
- Knowing far more about topics than most peers
- Difficulty stopping engagement when interest is firing
- Strong identity connection to interests
- Joy through interest engagement at consistent depth
- Sometimes interests called “obsessions” by others
- Difficulty engaging in chitchat about random topics
- Often person-focused interests (women) or systems-focused (men)
- Sustained interests over years or decades
- Sometimes serial intense interests cycling
7. Executive function traits
- Difficulty starting tasks despite wanting to
- Time-blindness — chronic underestimation or overestimation
- Working memory failures — forgetting mid-task
- Difficulty with administrative tasks
- Email pile-up that compounds
- Project 90% complete with final 10% impossible
- Inertia — difficulty starting AND stopping activities
- Decision paralysis on simple choices
- Cluttered physical and digital spaces
- Better at high-stakes urgent work than low-stakes routine
8. Identity and life-pattern traits
- Childhood patterns of intensity, sensitivity, or quietness
- Early reading or specific academic strengths
- Intense narrow friendships in childhood
- Mental health features emerging in teens or twenties
- Burnout episodes through adult life
- Career oscillation between achievement and collapse
- Strong values, often called “principled” or “rigid”
- Sense of being different from peers since childhood
- Difficulty understanding why things that feel hard are easy for others
- Recognition through reading about autism — “that’s me”
9. Masking and burnout traits
- Exhaustion after social events others enjoy
- Needing days to recover from gatherings
- Rehearsing conversations in advance
- Suppressing natural movements (stims)
- Eating foods you don’t like to avoid being seen as picky
- Performing facial expressions rather than feeling them
- One self at work, different self at home
- The sense of being watched while interacting
- Deep relief when alone
- History of burnout periods with skill loss
- Career patterns showing high-performance followed by collapse
- Chronic anxiety that responds incompletely to standard treatment
10. What to do with the recognition
If multiple sections of this checklist describe you consistently across years and contexts:
- Take the ND self-screen. Structured assessment covers autism, ADHD, AuDHD, and sensory differences in one instrument.
- Read further. The autism in women, signs of autism in adults, autistic masking, and autistic burnout guides cover the patterns in depth.
- Find ND community. Online or in person. The single most valuable resource for new-recognition adults.
- Consider formal assessment. If accommodation, validation, or paperwork is needed, an ND-affirming clinician.
- ND-affirming therapy. For identity work, masking recovery, and trauma processing.
- Reframe life history. Most late-diagnosed adults spend the first year reinterpreting decades of patterns through the new framework.
See our late-diagnosed autism guide for what typically follows recognition.
11. Frequently asked questions
How do I use this checklist?
Read through each section. Mark traits that consistently describe you across years and contexts, not just occasionally. Note traits that describe you only when masked vs. unmasked. Cluster recognition matters more than any single trait — multiple traits across multiple categories suggests pattern; isolated traits don't. The checklist is a structured starting point for self-recognition, not a diagnostic instrument. For formal diagnosis, take the results to an ND-affirming clinician.
How many traits do I need to be autistic?
There's no fixed number. Diagnostic criteria require persistent traits across multiple domains, present from early development, causing significant impact. The clinical thresholds vary by assessment tool. Practically: if you recognise yourself in most sensory, social, cognitive, and emotional categories at moderate or high intensity, and the patterns have been present throughout your life, autism is worth considering seriously. Take the screening test next, then consider formal assessment.
What if I only have some traits?
You might be sub-clinical (some autistic traits without meeting full diagnostic threshold). You might be masking heavily so the visible traits are reduced. You might be ADHD or another ND profile rather than autistic. You might be at a low-load life period when traits are less prominent. Single-trait possession is common in non-autistic people; cluster recognition is what suggests autism specifically.
Can autistic traits change over time?
The underlying neurology is stable but the visible expression shifts with life stage, masking pattern, and current load. Adults often have more visible traits in childhood (before masking), reduced visible traits in young adulthood (peak masking), and increasing visible traits in midlife (masking strategy breaks down). The traits themselves persist; the surface presentation evolves.
Is this the same as the AQ test?
The Autism Spectrum Quotient (AQ) and similar tools like RAADS-R are validated screening instruments with scoring. This checklist is a broader recognition tool covering more categories than the standardised screens. Most adults find both useful — the checklist for cluster recognition, the standardised screens for structured assessment. Take the ND self-screen for a combined approach.
Should I show this to a clinician?
Yes if pursuing diagnosis. A written list of recognised traits, ideally with specific examples and rough timeline, gives the clinician useful context that's often more accurate than what emerges in clinical interview alone. Many late-diagnosed adults bring extensive written self-history to their assessments.
What if my partner says I'm not autistic enough?
Common but unhelpful response. The visible traits an outside observer sees represent the masked version of the autism; the internal experience often shows substantially more. Partners are often surprised by post-diagnosis disclosure of how much was happening internally. Self-recognition isn't conditional on others validating it. Take the ND self-screen, talk to a clinician if needed, build your own framework regardless.
Could it be ADHD instead of autism?
Could be either or both. The two conditions overlap and co-occur in roughly 50% of cases (AuDHD). Some traits in this checklist are autism-specific (sensory monotropism, predictability preference, deep special interests). Others are shared with ADHD (executive dysfunction, masking, emotional intensity). Take both the AuDHD test and the ND self-screen for differential recognition.