Autism Assessment for Adults: What to Expect & How to Prepare

Autism Assessment for Adults: What to Expect & How to Prepare

October 23, 20251 min read

For many adults, deciding to pursue an autism assessment can feel like opening an old book you’ve never had the courage to read. It’s not about labelling - it’s about understanding yourself better. Across the UK, thousands of adults are now seeking clarity about their neurodivergence, often after recognising familiar traits in their children or colleagues.

autism preparing for assessment

Why Adults Seek Assessment

Adult autism assessments are on the rise because awareness is improving. Many women, for example, were misdiagnosed or overlooked in childhood. Others masked their differences so well that no one - not even they — recognised the signs.

“I see adults who’ve built entire careers around coping strategies,” says Sarah Phelan, CEO of Autism Services Group (ASG). “They’re capable, high-functioning, but exhausted. Diagnosis gives them permission to exhale.”


What to Expect in an Adult Autism Assessment

A typical assessment includes:

  • Clinical interviews to discuss developmental history.

  • Observation-based activities, such as ADOS-2 modules, to identify social communication patterns.
    (NICE) (ADOS-2)

  • Collateral input from family or partners when possible.

  • Standardised questionnaires and screening tools.

At ASG, clinicians use evidence-based tools (ADOS-2, ADI-R, DIVA-5) to ensure accuracy and consistency.
🔗 Learn about ASG’s autism assessments


How to Prepare

  1. Gather your history – old school reports, teacher notes, or reflections from family can help.

  2. Reflect on your experiences – note where communication, sensory, or emotional challenges appear.

  3. Be honest and curious – assessments aren’t tests; they’re collaborative explorations.

“The best assessments are conversations,” says Sarah. “We’re not judging, we’re listening.”


After the Assessment

If autism is confirmed, you’ll receive a detailed report with recommendations for support, at work, home, and socially. Whether diagnosed or not, the process itself is often enlightening.

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