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Strong Evidence

What Autism Is

Autism is a neurodevelopmental difference affecting how people perceive the world, communicate, and interact. It's not a disease to cure - it's a different way of being that comes with both challenges and strengths.

The clinical definition (DSM-5-TR)

Autism Spectrum Disorder is characterised by:

A. Social Communication

Persistent differences in social communication and social interaction across multiple contexts.

B. Restricted/Repetitive Patterns

Restricted, repetitive patterns of behaviour, interests, or activities.

These characteristics must be present from early development (even if not recognised until later) and cause clinically significant impact. Support needs are specified as Level 1, 2, or 3.

Autism is...
  • A neurodevelopmental difference present from early life
  • Characterised by differences in social communication
  • Associated with patterns of restricted interests or repetitive behaviours
  • Often involves differences in sensory processing
  • A spectrum - no two autistic people are the same
  • Highly heritable (approximately 80% genetic component)
  • A lifelong condition - not something you "grow out of"
  • Associated with both challenges AND strengths
Autism is not...
  • Caused by vaccines, parenting, or trauma
  • A disease or illness that needs "curing"
  • Always associated with intellectual disability
  • Always visible or obvious
  • The same as lacking empathy or emotions
  • A barrier to meaningful relationships or success
  • A male condition (many girls and women are autistic)
  • Something that can be "switched off" with willpower

Understanding the spectrum

The "spectrum" doesn't mean a linear scale from "mild" to "severe". Think of it as multiple dimensions where every autistic person has their own unique profile of strengths, challenges, and support needs.

Social communicationFrom significant support needs with speech/language to subtle differences in conversation flow
Restricted interestsFrom intense focus on narrow topics to passionate expertise that drives career success
Repetitive behavioursFrom stimming for regulation to preference for routines and consistency
Sensory processingFrom severe sensory sensitivities affecting daily life to mild preferences others don't notice
Support needsFrom requiring 24/7 support to living independently with minimal adjustments

What the research tells us

Strong Evidence

Autism affects approximately 1-2% of the population

Population studies (CDC 2023, UK studies)

Strong Evidence

Heritability is approximately 80%, making genetics the primary factor

Twin studies (Tick et al., 2016)

Strong Evidence

Girls and women are significantly underdiagnosed

Current ratio ~3:1 male:female, likely reflecting bias (Loomes et al., 2017)

Strong Evidence

Autism frequently co-occurs with ADHD (50-70% overlap)

Meta-analyses (Rommelse et al., 2010)

Strong Evidence

Early support improves outcomes but autism itself doesn't disappear

Longitudinal studies (Pickles et al., 2016)

The empathy myth

One of the most harmful misconceptions about autism is that autistic people lack empathy. Research shows this is wrong:

  • Cognitive empathy (reading what others think/feel) may be different - autistic people may not automatically infer others' mental states
  • Affective empathy (caring about others' feelings) is often intact or even heightened - many autistic people feel others' emotions deeply
  • The "double empathy problem" suggests communication difficulties go both ways - non-autistic people also struggle to understand autistic people

Many autistic people describe feeling emotions more intensely, not less.

The neurodiversity perspective

The neurodiversity paradigm views autism as a natural form of human variation rather than a disorder to be fixed. Key points:

  • Autism is a difference, not a defect
  • Many challenges come from a world designed for neurotypical people
  • Autistic people have valuable perspectives and strengths
  • Support should focus on quality of life, not "normalisation"

This doesn't mean autism doesn't involve genuine difficulties or that support isn't needed. It means the goal of support should be wellbeing and autonomy, not making someone appear "less autistic".

Common autistic strengths

While experiences vary, many autistic people share certain strengths:

Attention to detail

Noticing things others miss

Deep expertise

Becoming highly knowledgeable in areas of interest

Honest communication

Direct, clear, without hidden agendas

Pattern recognition

Seeing connections and systems

Loyalty and fairness

Strong sense of justice and commitment

Creative thinking

Novel approaches and perspectives