What is developmental delay and how is it diagnosed?

Developmental delay refers to a child's developmental progress being significantly behind the typical range for their age across one or more areas of development: motor skills (gross motor such as sitting, walking; fine motor such as reaching, grasping, using hands); speech and language; cognitive skills (learning, problem-solving, understanding); social and emotional skills; and self-care skills. A delay in one area is a single-domain delay; delays across multiple areas are a global developmental delay. Developmental delay is diagnosed by a paediatrician through developmental assessment, typically after a GP referral or referral from a maternal and child health nurse. For very young children (under 7), formal diagnosis is not required to access early intervention through the NDIS Early Childhood Approach. A concern about development is sufficient to begin the process.

What is the NDIS Early Childhood Approach and how does my child access it?

The NDIS Early Childhood Approach (ECA) is a support pathway for children under 7 who have a developmental delay or disability. The key features of the ECA are: no formal diagnosis is required; support is focused on building the child's skills and capacity as early as possible; and the family is involved in all aspects of the intervention. To access the ECA, families contact their local ECA partner organisation (found via the NDIS website by entering their postcode) or call the NDIS on 1800 800 110. The ECA partner meets with the family, discusses the child's needs, and connects them with funded supports including speech pathology, occupational therapy, and physiotherapy as appropriate. For many children, the ECA is the first and most important access point to funded intervention.

Why does early intervention matter so much for developmental delay?

The evidence for early intervention is robust and consistent: intervention delivered during the early childhood years (particularly under 5, and especially under 3) produces substantially better outcomes than the same intervention delivered later. The reason is neuroplasticity: the young brain is in a period of rapid development and reorganisation, and is more responsive to therapeutic input and environmental experience than the older brain. Skills and patterns established early become the foundation for later development. Delaying intervention while 'waiting to see if the child catches up' loses this neuroplasticity window. The children who do catch up often catch up because of early intervention, not instead of it. For families who receive 'wait and see' advice from a GP or early childhood professional: this advice is not supported by current evidence for most developmental delays. Seek a second opinion or self-refer to an ECA partner.

What are the key allied health providers for developmental delay?

The most common allied health providers for developmental delay in the early years include: speech pathologists, who address speech sound development, language comprehension and expression, social communication, and swallowing; occupational therapists (OT), who address fine motor skills, sensory processing, self-care skills (eating, dressing), and play skills; and physiotherapists, who address gross motor development, movement, balance, and coordination. The specific mix of providers depends on which developmental areas are delayed. A child with a language delay may primarily need speech pathology; a child with gross motor delay may primarily need physiotherapy; a child with global delay typically needs all three. Early intervention teams often include all these professionals working collaboratively, which is the most effective model because developmental domains are interconnected.

What questions should I ask when choosing an early intervention provider?

Key questions when choosing an early intervention provider: What specific experience does this provider have with children in my child's age group and with the type of delay my child has? What therapy approaches do they use, and are those approaches evidence-based (ask specifically about evidence)? How do they involve parents in therapy — does the therapist coach parents in strategies to use between sessions, or does the parent wait in the waiting room? What does a typical session look like for a child my child's age? How frequently do they recommend sessions, and what is the rationale? How do they measure and report progress? Do they communicate with the child's other providers and with the child's preschool or childcare? Are they NDIS-registered? What is their waitlist time? What happens during a pulmonary exacerbation or significant illness episode?

What is parent-implemented intervention and why is it important?

Parent-implemented intervention means that parents, trained by therapists, deliver therapeutic strategies during everyday interactions with their child — during play, meals, bathing, dressing, and daily routines. Research consistently shows this approach produces better outcomes than therapist-only sessions for most areas of early childhood development, because the parent is with the child for hours each day while the therapist sees the child for 30 to 60 minutes per week. The therapist's role shifts from delivering all the therapy directly to coaching the parent in specific, evidence-based strategies and reviewing how those strategies are working at each session. Quality early intervention involves the parent as an active participant and skill-builder, not a passive observer. If a therapist is consistently seeing the child alone while the parent waits outside, this is worth discussing with the provider.

How do I know if my child is making adequate progress with their current providers?

Progress monitoring is a fundamental part of quality early intervention. You should expect: measurable goals set at the beginning of the intervention period (not vague goals like 'improve communication' but specific measurable targets like 'child uses 50 words spontaneously by date'); regular progress reviews (at minimum, every 3 to 6 months) where the therapist shares assessment data showing whether goals are being met; transparent discussion if progress is slower than expected, including exploration of why and what should be adjusted; and regular written reports (important for NDIS reviews and for communication with other providers). If after 6 months of intervention you do not have a clear sense of what goals have been set, what has been achieved, and what the plan is going forward, this is a conversation to have with your provider. If concerns are not addressed, seeking a second opinion from another therapist for a progress review is reasonable.

What is key worker and transdisciplinary service delivery and why does it matter?

Key worker models and transdisciplinary approaches are ways of organising multi-provider teams in early intervention that reduce fragmentation and confusion for families. In a key worker model, one professional is identified as the primary contact for the family and coordinates the overall intervention plan; other specialists consult and contribute their expertise but the key worker delivers much of the day-to-day work using strategies from all disciplines. In a transdisciplinary approach, professionals from different disciplines work together, sharing knowledge and strategies across discipline boundaries rather than working in parallel silos. These approaches reduce the burden on families of attending multiple separate appointments with multiple separate providers who do not communicate with each other. They are particularly important for children with complex or global developmental delays who need input from multiple disciplines. When evaluating early intervention programs, ask how the team communicates and coordinates, and whether a key worker model is used.

Developmental Delay Early Years Guide: Parent Questions for Choosing Intervention Providers

Key Points

Developmental delay is identified when a child’s development is significantly behind the typical range; formal diagnosis is not required to access the NDIS Early Childhood Approach for children under 7
The neuroplasticity window in early childhood makes early intervention far more effective than the same intervention delivered later; ‘wait and see’ advice is not supported by evidence for most developmental delays
The NDIS Early Childhood Approach connects families to funded early intervention (speech pathology, OT, physiotherapy) without a formal diagnosis; contact your local ECA partner or call NDIS on 1800 800 110
Quality early intervention involves coaching parents in strategies to use every day, not just delivering therapy directly to the child during weekly appointments
Progress should be measured against specific, measurable goals; if after 6 months you cannot clearly describe what goals have been set and what has been achieved, raise this with your provider
Key worker and transdisciplinary team models reduce the coordination burden on families and produce better integrated outcomes for children with complex developmental needs

Developmental Delay in the Early Years

Developmental delay in the early years is both common and highly responsive to well-timed intervention. The first five years of life are a window of rapid brain development during which therapeutic input has a disproportionately large and lasting effect. For parents who have recently received a developmental concern from their maternal and child health nurse, GP, or childcare worker, the most important thing to know is: act now, not later.

This guide is for parents of children with developmental delay in Australia, covering what developmental delay means, how to access the NDIS Early Childhood Approach, what to look for in early intervention providers, and the questions that help families make informed choices about who is involved in their child’s care.

Understanding Developmental Delay

Domains of Development

Developmental delay can affect any or all of the following domains:

Gross motor: Large movement skills. Sitting, crawling, pulling to stand, walking, running, jumping. A child with gross motor delay may achieve these milestones later than expected, with different quality or pattern, or not at all.

Fine motor: Small movement skills, particularly of the hands and fingers. Reaching, grasping, releasing, manipulating objects, drawing, and eventually writing. Fine motor delay affects play, self-care (eating, dressing), and later school readiness.

Speech and language: Both expressive (speaking, communicating) and receptive (understanding). A child with language delay may have limited vocabulary, delayed sentence formation, difficulty understanding instructions, or trouble with social communication.

Cognitive development: Learning, problem-solving, understanding cause and effect, memory, and concept formation. Cognitive delay affects how the child learns from experience and from instruction.

Social and emotional: Turn-taking, social play with peers, responding to others’ emotions, developing friendships, emotional regulation (managing feelings without becoming overwhelmed). Social communication difficulties are a feature of autism spectrum disorder but can also occur in other developmental delay profiles.

Self-care: Eating, drinking, dressing, and toileting. Delays in self-care skills affect the child’s independence and the demands on family carers.

Global vs Single Domain Delay

A child with delay in only one developmental area (for example, speech only) has a single-domain delay. A child with delay across two or more areas has a global developmental delay. Global developmental delay typically requires input from multiple allied health disciplines and warrants paediatric assessment to investigate the underlying cause.

Accessing the NDIS Early Childhood Approach

The NDIS Early Childhood Approach is the most accessible and most important pathway for early intervention funding for Australian children under 7.

Key Features

No diagnosis required: A concern about development is sufficient. Children under 7 do not need to meet the standard NDIS disability criteria or have a confirmed diagnosis.
Family-centred: The approach centres the family’s observations, priorities, and capacity to support their child.
Capacity-building focus: Supports aim to build the child’s skills and the family’s capacity to support development, not just deliver therapy visits.
Flexibility: The ECA partner works with the family to identify what supports are needed and connects them with appropriate providers.

How to Access

Contact your local ECA partner organisation (found at the NDIS website by entering your postcode) or call the NDIS on 1800 800 110
The ECA partner organises an initial meeting with the family to discuss the child’s needs
The partner coordinates access to funded supports: typically initial therapy assessments, then funded therapy sessions
For children who require longer-term funded support beyond the initial ECA period, the partner assists with NDIS plan access if appropriate

What Happens After the ECA

For many children with mild delays who respond well to early intervention, the ECA provides sufficient support and they transition out of the NDIS system without requiring ongoing disability support. For children whose needs are more significant, the ECA typically transitions to a full NDIS plan before the child turns 7 or enters school.

Choosing Your Early Intervention Providers

Speech Pathology

Speech pathology is relevant when a child has delays in:

Talking (limited words, unclear speech, late talking)
Understanding what is said (following instructions, answering questions)
Social communication (making eye contact, initiating interaction, taking turns)
Eating and swallowing (if relevant)

Questions to ask when choosing a paediatric speech pathologist:

What ages and types of delay do you specialise in?
Do you involve parents in sessions and coach us in strategies to use at home?
How do you track progress and share results with us?
What is your approach to late talking in toddlers?
Do you have experience with AAC (augmentative and alternative communication) if my child needs it?
Are you NDIS-registered?

Occupational Therapy

OT is relevant when a child has delays in:

Fine motor skills (manipulating toys, drawing, using utensils)
Sensory processing (strong reactions to sounds, textures, light, or movement; seeks intense sensory input)
Self-care (difficulty learning to eat, dress, or manage toileting)
Play skills (limited play variety, difficulty sustaining attention in play)

Questions to ask when choosing a paediatric OT:

What is your approach to sensory processing difficulties?
How do you assess and address fine motor delay?
Do you communicate with the child’s childcare or preschool teachers?
What home strategies will you coach us to implement between sessions?
Do you use a play-based approach to therapy?

Physiotherapy

Physiotherapy is relevant when a child has delays in:

Gross motor milestones (sitting, crawling, standing, walking)
Balance and coordination
Muscle tone (low tone is common in developmental delay and affects movement and posture)
Specific movement difficulties

Questions to ask when choosing a paediatric physiotherapist:

Do you have experience with children with low muscle tone?
What exercises and activities will you give us to do at home?
How often do you recommend sessions initially?
Do you have experience working collaboratively with OT and speech pathology teams?

What Effective Early Intervention Looks Like

Parent Coaching Is Central

The most effective early intervention programs train and coach parents to use therapeutic strategies in everyday interactions. Session time with a therapist is 30 to 60 minutes per week at most; the parent is with the child for hours every day. The multiplication effect of an informed, coached parent using strategies consistently at home is far greater than the cumulative effect of weekly sessions alone.

Look for therapists who:

Spend time in each session coaching you in strategies for home
Send home activities and practice suggestions
Ask at the next session how the home strategies went
Adjust strategies based on what worked and what did not

Integrated Team Communication

When a child receives multiple therapies, the providers should communicate with each other. Ask:

Do you communicate regularly with my child’s other therapists?
Will you provide reports to our GP and paediatrician?
Can you connect with my child’s childcare or preschool to support consistency?

Frequency and Intensity

Early intervention research supports more frequent intervention as producing better outcomes. For children with significant delays, weekly sessions at minimum are appropriate; some children benefit from more intensive programs. The therapist should explain the recommended frequency and the rationale.

Monitoring Progress

Progress monitoring protects your child’s intervention time from being spent on ineffective approaches for too long.

What to Expect

Goal setting: At the start of each funding period, specific measurable goals for the child (and sometimes for the family) should be agreed and documented
Regular reviews: Progress toward goals should be measured and discussed at least every 3 to 6 months
Transparent reporting: Progress reports should be provided for NDIS plan reviews and to communicate with the paediatrician and other team members

If Progress Is Not Happening

If after 6 months of intervention the goals have not been met and there is no clear explanation of why or what will be changed, consider:

Discussing the concern directly with the therapist
Requesting a formal progress review
Seeking a second opinion from another therapist
Discussing with the ECA partner whether the current providers are the best fit

Children make different rates of progress; some variation is normal. But transparency about goals, measurement, and plan adjustment is a basic expectation of quality early intervention.

The Provider Team

Provider	Role	Funding
Paediatrician	Developmental assessment, diagnosis, referrals	Medicare
ECA partner	NDIS access coordination, early intervention navigation	NDIS
Speech pathologist	Language, speech, social communication, eating	NDIS (ECA or plan), Medicare CDM
Occupational therapist	Fine motor, sensory, self-care, play	NDIS (ECA or plan), Medicare CDM
Physiotherapist	Gross motor, balance, muscle tone	NDIS (ECA or plan), Medicare CDM
Early childhood educator (childcare/preschool)	Developmental support in natural environment	Education system
Psychologist	Behavioural support, family adjustment	Medicare MHP, NDIS

Key Resources

NDIS Early Childhood Approach - access information and ECA partner finder
Raising Children Network - evidence-based information for families on child development and delays
Speech Pathology Australia - Find a Speech Pathologist directory
Occupational Therapy Australia - Find an OT directory
Australian Physiotherapy Association - Find a physiotherapist

Connecting with Early Intervention Providers

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Andre Smith All articles

Co-founder & CEO

Andre is the co-founder and CEO of Carevo. He holds a Bachelor of Commerce, majoring in Marketing, and a Bachelor of Arts from UNSW Sydney, where his majors were International Relations, Politics, Information Systems, and Media and Communications, graduating in 2014, and went through the UNSW 10x Founders accelerator in 2023.

Developmental Delay Early Years Guide: Parent Questions for Choosing Intervention Providers

Key Points

Developmental Delay in the Early Years