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Side-by-side guide

Autism vs Developmental Delays — A Parent's Guide

"Is my child just a little behind, or is there something more specific going on?" Every parent who notices a developmental gap asks this. Here's how to think about it clearly — and book the right first appointment.

Key differences at a glance

Autism Spectrum

Developmental Delays

Scope

Autism Spectrum: Autism is a specific profile involving social communication, sensory processing, and patterns of behaviour.

Developmental Delays: Developmental delays describe a broader pattern of slower development — in motor skills, speech, social milestones, or cognition — without necessarily pointing to one cause.

What the assessment answers

Autism Spectrum: A clinical assessment for autism looks at specific diagnostic features across domains.

Developmental Delays: A developmental screening maps current milestones against typical ranges and identifies which areas need support.

Typical first step

Autism Spectrum: Clinical assessment (psychometric + clinical interview).

Developmental Delays: Developmental screening → may lead to a more specific assessment depending on findings.

Where they overlap

  • Children with developmental delays may ultimately be assessed as autistic, or as having another specific profile.
  • Early Intervention supports both — it doesn't require a diagnosis to start.
  • Speech Therapy, Occupational Therapy, and Sensory Integration Therapy help across the spectrum.

Frequently Asked Questions

Should I wait to see if my child 'catches up'?+

Early intervention produces the largest gains. If you have concerns, book a consultation. If the assessor feels a wait-and-watch approach fits your child's specific profile, they'll tell you. If not, you start with advantage on your side.

At what age can autism be identified?+

Many children are identified between 18 months and 3 years. Some present later, especially if language is a strength. Our Early Intervention Program works with children as young as 18 months.

Not sure which assessment to book first?

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