7 Discreet Signs of Undiagnosed Autism in Adults

Psychologist Lisa Williams reveals 7 subtle signs adults with undiagnosed autism often show.

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Oct 1, 2026

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7 Discreet Signs of Undiagnosed Autism in Adults

Psychologist Lisa Williams reveals 7 subtle signs adults with undiagnosed autism often show.

In brief

Psychologist Lisa Williams reveals 7 subtle signs adults with undiagnosed autism often show. Adults with undiagnosed autism may experience isolation and trauma, but early identification through these signs can improve their self-perception and daily life. Originally reported by Psychologies.

Why Adults Often Go Undiagnosed

Adults with undiagnosed autism face challenges because symptoms are not obvious, professional support was lacking, and knowledge about autism was limited.

The 'Lost Generation' Problem

Many adults experience delayed diagnosis or never receive one, leading to a group called the 'lost generation' who live with autism without awareness.

Lisa Williams' 7 Signs

Lisa Williams' 7 Signs

Psychologist Lisa Williams lists seven common signs of autism in adults: dependency on structure, specific interests, heightened sensory sensitivities, difficulty with change, social rule challenges, relationship difficulties, and work integration issues.

Dependency on Structure

Adults with undiagnosed autism often rely on routine, maintain daily habits, and feel unstable when plans change unexpectedly.

Sensory Sensitivities

Heightened sensitivity to light, sound, smells, and textures is common among adults with undiagnosed autism.

Social Rule Challenges

Adults with undiagnosed autism struggle with eye contact, casual conversations, personal space, body language, and understanding subtle humor.

The short version

Adults with undiagnosed autism may experience isolation and trauma, but early identification through these signs can improve their self-perception and daily life.

Read the original on Psychologies

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