🧩New to sensory tools? Grab our free guide — what every Australian parent needs to know.Get the free checklist →
One Stop Sensory
🎁 Get Free Sensory ChecklistExplore All Products
Guide
Updated April 2026

What is Sensory Processing Disorder? A Parent's Guide 2026

A clear, practical explanation of SPD for Australian parents — covering signs, types, diagnosis pathways, and evidence-based support strategies.

What is Sensory Processing Disorder?

Sensory Processing Disorder (SPD), formerly known as Sensory Integration Disorder, is a neurological condition in which the brain has difficulty receiving, organising, and responding to sensory information from the environment and the body. For most people, the nervous system takes in sensory input — touch, sound, movement, taste, smell, sight — and automatically filters and organises it so we can function. For children with SPD, this process is disrupted, leading to responses that may seem extreme, unusual, or unpredictable.

Dr A. Jean Ayres, an occupational therapist and neuroscientist, first described sensory integration dysfunction in the 1970s. Her work laid the foundation for modern occupational therapy approaches used across Australia today. While the DSM-5 does not list SPD as a standalone diagnosis, it is recognised by paediatric occupational therapists as a significant and often debilitating condition that affects daily functioning, learning, relationships, and emotional regulation.

How SPD Differs from Autism and ADHD

Sensory processing difficulties frequently co-occur with autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD). Research estimates that around 90% of autistic individuals experience sensory differences, and between 40–60% of children with ADHD have significant sensory processing challenges. This overlap can make it difficult to disentangle where one condition ends and another begins.

However, SPD is distinct from both. Autism also involves differences in social communication, restricted interests, and repetitive behaviours. ADHD is primarily characterised by difficulties with attention regulation, impulse control, and executive function. SPD, by contrast, is specifically about how the nervous system processes and integrates sensory input. A child can have SPD without autism or ADHD, and addressing sensory processing needs through OT intervention can dramatically improve daily functioning regardless of co-occurring diagnoses.

The Three Main Types of Sensory Processing Disorder

1. Over-Responsive (Hypersensitivity)

Children who are over-responsive to sensory input experience ordinary sensations as overwhelming or even painful. A gentle touch may feel like a hard shove. The hum of fluorescent lights might be as distracting as a jackhammer. Clothing tags, sock seams, and certain food textures can trigger genuine distress. These children may avoid crowded places, resist being touched, cover their ears frequently, or become dysregulated by transitions between environments.

2. Under-Responsive (Hyposensitivity)

Under-responsive children have a higher threshold for sensory input — they may not notice or register sensations that others find obvious. They might not feel pain when injured, appear unaware of their name being called, seem clumsy or uncoordinated, or fail to notice that their hands are dirty. These children often appear disengaged or lethargic, and are sometimes misidentified as having hearing or vision problems before sensory processing differences are explored.

3. Sensory Seeking

Sensory-seeking children crave intense sensory input in order to feel regulated. They may crash into furniture, jump from heights, chew on clothing or non-food items, touch everything and everyone, make loud noises, or spin and rock constantly. This behaviour is not defiance — it is the nervous system actively seeking the input it needs to function. Sensory-seeking behaviour can look like ADHD, which is why accurate assessment is important.

Signs of SPD Across Different Age Groups

Babies (0–12 months)

  • Extremely difficult to settle or soothe
  • Arching away from being held or cuddled
  • Hypersensitivity to sounds — startling at ordinary noise levels
  • Difficulty with feeding due to oral sensory sensitivity
  • Unusual lack of response to stimulation

Toddlers (1–3 years)

  • Intense tantrums triggered by clothing, food textures, or transitions
  • Refusal to walk on grass, sand, or uneven surfaces
  • Extreme picky eating beyond typical toddler fussiness
  • Seeking constant movement — rocking, spinning, jumping
  • Delayed motor milestones due to poor body awareness

School-Age Children (4–12 years)

  • Difficulty coping in busy classroom environments
  • Refusal to participate in art, PE, or messy play activities
  • Emotional dysregulation disproportionate to the apparent trigger
  • Avoiding playground equipment or being too rough with peers
  • Wearing the same clothing repeatedly due to sensory comfort
  • Difficulty concentrating without fidget tools or movement breaks

Getting a Diagnosis in Australia

In Australia, the primary pathway to identifying sensory processing difficulties is through a paediatric occupational therapist. Your first step is to speak with your GP, who can refer you to an OT and may create a Chronic Disease Management (CDM) Plan allowing Medicare rebates on a number of OT sessions. Paediatricians can also screen for sensory differences and provide referrals.

During an OT assessment, the therapist will use standardised tools — such as the Sensory Profile 2 or the Sensory Processing Measure — combined with clinical observation, parent interviews, and sometimes school-based observations. The assessment typically results in a detailed report outlining the child's sensory profile and recommendations for home, school, and therapeutic intervention.

Treatment Approaches for SPD

Sensory Diet

A sensory diet is a personalised plan of sensory activities incorporated throughout the day to help regulate the nervous system. Developed by an OT, it typically includes proprioceptive activities (heavy work), vestibular input, and calming or alerting strategies timed around the child's needs. Read our full guide on what is a sensory diet for detailed examples.

Occupational Therapy

Occupational therapy using a sensory integration framework is the primary evidence-based intervention for SPD. Sessions may look like play but are carefully structured to provide the right type and amount of sensory input. OT aims to improve the brain's ability to organise and respond to sensory input more effectively over time.

Environmental Modifications

Adapting the child's environment can dramatically reduce sensory triggers. At home, this may mean switching to seamless clothing, using dimmable lighting, creating a quiet corner, and reducing clutter. At school, it may include a noise-reducing headphone, a wobble cushion, or permission to take movement breaks.

Sensory Tools

Many families find that targeted sensory tools provide immediate, practical relief. Weighted blankets and lap pads offer deep pressure input for regulation. Noise-cancelling headphones reduce auditory overwhelm. Fidget toys and chewable jewellery give appropriate sensory outlets during tasks requiring focus. Browse our full range of recommendations in our sensory tools guide and sensory toys guide.

Supporting Your Child at Home and School

Understanding your child's specific sensory profile is the single most powerful thing you can do. Once you know whether your child is over-responsive, under-responsive, or seeking in different sensory systems, you can tailor your responses accordingly. Rather than trying to push through sensory triggers, work with your OT to build predictable routines that allow your child's nervous system to stay regulated throughout the day.

At school, advocate for your child's needs through the learning support team. Share the OT assessment report, request an Individual Learning and Adjustment Plan (ILP), and suggest specific accommodations. The earlier these supports are in place, the better the long-term outcomes for your child's confidence, learning, and social participation.

Free Sensory Checklist for Parents

Download our expert-compiled checklist of signs to watch for, plus top tool recommendations for each sensory system.

No spam, ever. Unsubscribe anytime.

Frequently Asked Questions