The 8 Senses: Understanding Your Autistic Child’s Sensory World

Ask most people how many senses humans have and they will say five. Sight, hearing, touch, taste, smell. It is one of the first things we learn at school, and most of us never question it again.

But there are actually eight. And understanding all eight is one of the most important things you can do if you are raising or teaching an autistic child.

Dr Luke Beardon highlights this in his book What Works for Autistic Children, and it is a game-changer. Because once you understand the full sensory picture, so much of what gets labelled as “difficult behaviour” suddenly makes a completely different kind of sense.

The five senses you already know

Let us start with the familiar ones, because even these work differently for many autistic children.

Sight: Fluorescent lighting that most people barely notice can be physically painful for an autistic child. Visual clutter, bright colours, and busy patterns can make it hard to focus or feel calm. Some children are drawn to visual patterns and light, while others need to shield their eyes in environments that feel perfectly normal to everyone else.

Hearing: An autistic child may hear the hum of a fridge, the buzz of a light fitting, and the ticking of a clock all at the same volume as a teacher’s voice. They are not ignoring you. Their brain is struggling to filter which sound matters most. Unexpected loud sounds can feel like a physical assault.

Touch: Clothing tags, certain fabrics, the feeling of socks with seams, sticky hands, light brushing touch versus deep pressure. For many autistic children, touch is not just a preference. It is a system that is constantly sending signals, and those signals can range from comforting to overwhelming.

Taste: This is about far more than being a “fussy eater.” Autistic children may experience textures, temperatures, and flavours with far greater intensity. A food that feels fine to you might feel unbearable in their mouth. This is not a choice. It is a sensory reality.

Smell: Some autistic children can detect smells that nobody else in the room notices. A cleaning product, a perfume, the smell of a particular food. These can trigger nausea, anxiety, or a need to leave the space immediately. What seems like “overreacting” is actually a sensory system picking up information at a different level.

Sense 6: Vestibular (balance and movement)

The vestibular system tells your brain where your body is in relation to gravity. It controls your sense of balance, your ability to stay upright, and your awareness of whether you are moving, spinning, or still.

For some autistic children, this system is under-responsive. They seek out intense movement because they need more input to feel grounded. These are the children who spin, swing, rock, bounce, and never seem to stop moving. They are not being hyperactive. They are feeding a sensory system that needs more information.

For others, the vestibular system is over-responsive. They feel dizzy or anxious on swings. They avoid climbing. They feel unstable on uneven ground. Stairs without handrails feel frightening, not because they are uncoordinated, but because their brain is receiving unreliable signals about where their body is in space.

Sense 7: Proprioception (body awareness)

Proprioception is the sense that tells you where your body parts are without looking at them. It is how you can touch your nose with your eyes closed, how you know how much pressure to use when holding a pencil, and how you navigate a dark room without bumping into everything.

Children who are under-responsive in proprioception often seek deep pressure. They crash into things, chew on objects, lean heavily on furniture, squeeze too hard when hugging, and write with so much force that they tear through paper. They are not being rough or careless. Their body needs strong input to know where it is.

Children who are over-responsive may seem clumsy or hesitant. They bump into things not because they are not paying attention, but because their brain is not accurately mapping where their body ends and the world begins. Fine motor tasks like handwriting or using scissors can be exhausting because every movement requires conscious effort that most people do automatically.

Sense 8: Interoception (internal body signals)

This is the one that surprises most people. Interoception is the sense that tells you what is happening inside your body. It is how you know you are hungry, thirsty, too hot, too cold, in pain, or need the toilet.

For many autistic children, interoceptive signals are unreliable, delayed, or difficult to interpret. A child might not recognise hunger until they are shaking and unable to function. They might not feel the need for the toilet until it is urgent. They might not notice pain until an injury is significant. Or the opposite: they might feel every internal signal so intensely that it becomes overwhelming.

This has huge implications. A child who does not recognise thirst will not ask for water. A child who cannot reliably feel when they need the toilet will have accidents, and those accidents are not a behavioural issue. They are a sensory processing difference. A child who does not recognise that they are becoming overwhelmed cannot tell you they need a break before the meltdown happens.

Why this changes everything

When you understand all eight senses, the behaviour you see in autistic children starts to make a completely different kind of sense.

The child who refuses to wear certain clothes is not being difficult. Their tactile system is sending distress signals that you cannot see.

The child who melts down in a supermarket is not being naughty. Their visual, auditory, and olfactory systems are all in overdrive at the same time.

The child who needs to move constantly is not being disruptive. Their vestibular and proprioceptive systems need more input to feel regulated.

The child who has toileting accidents at age eight is not being lazy. Their interoceptive system is not sending clear signals.

The child who eats the same three foods every day is not being defiant. Their taste and texture sensitivity makes most foods physically uncomfortable.

None of this is a choice. None of it is a behaviour problem. It is a sensory processing difference, and it deserves understanding, not consequences.

Building your child’s sensory profile

Every autistic child has a unique sensory profile. Some senses may be over-responsive (the child avoids or is distressed by input). Some may be under-responsive (the child seeks out more input). And these can change depending on the day, the environment, energy levels, and stress.

Start by observing across all eight senses:

There is no right or wrong sensory profile. The goal is not to “fix” your child’s senses. It is to understand them, so you can adjust the environment to reduce distress and increase comfort.

For teachers: what this means in the classroom

If a child is struggling in your classroom, run through all eight senses before you reach for a behaviour strategy.

Is the lighting too harsh? Is there background noise you have tuned out but the child cannot? Is the chair uncomfortable? Is the room too warm? Is the child hungry but not able to recognise it? Do they need to move before they can focus?

Often the simplest sensory adjustments make the biggest difference. A wobble cushion. Permission to wear headphones. A fidget tool. A seat away from the window. A snack break. A movement break before a writing task. These are not rewards or special treatment. They are access needs.

The bottom line