Sensory Processing Disorder & Autism: What Parents Need to Know

TL;DR: Sensory processing differences affect up to 90% of autistic children. Your child’s brain may process sensory information — sound, light, touch, movement, smell, taste, body position, and internal signals — differently than neurotypical children. They may be hypersensitive (overwhelmed by input), hyposensitive (seeking more input), or both in different sensory channels. Sensory processing challenges aren’t about willpower or behavior — they’re neurological. Understanding your child’s unique sensory profile is essential for reducing meltdowns, building tolerance, and creating environments where they can thrive. This guide covers the 8 sensory systems, common signs, assessment, and practical strategies you can use at home today.

When your child screams at the sound of a hand dryer, refuses to wear anything but one specific pair of pants, gags at the texture of mashed potatoes, or spins in circles for 20 minutes — they’re telling you something about how their brain processes the world. They’re not being dramatic, difficult, or attention-seeking. Their nervous system is genuinely experiencing something different from what yours experiences.

For many autistic children, sensory processing differences are the most impactful aspect of their daily lives — more than social challenges, more than communication differences. The world is literally too loud, too bright, too rough, too unpredictable, or conversely, not enough — not enough movement, not enough pressure, not enough stimulation.

Understanding sensory processing isn’t just helpful for your child. It’s transformative for your entire family.

What Is Sensory Processing?

Sensory processing is how the nervous system receives, organizes, and responds to sensory input from the environment and from within the body. It’s the brain’s ability to take in information from the senses, filter what’s important, and produce an appropriate response.

In typical processing: Your brain filters out the hum of the refrigerator, the feeling of your socks on your feet, and the brightness of the overhead light — allowing you to focus on the conversation you’re having.

In atypical processing: The refrigerator hum is unbearable, the socks feel like sandpaper, and the light is blinding — making it nearly impossible to process the conversation on top of all that sensory noise.

Sensory Processing Disorder vs. Autism

Sensory Processing Disorder (SPD) is a condition where the brain has difficulty organizing and responding to sensory input. It’s not currently recognized as a standalone diagnosis in the DSM-5 (the diagnostic manual used in the US), though it is widely recognized by occupational therapists and researchers.

Autism includes sensory differences as a diagnostic criterion (since the DSM-5 was updated in 2013). “Hyper- or hyporeactivity to sensory input” is one of the criteria for autism spectrum disorder.

The overlap:

Up to 90% of autistic people have significant sensory processing differences
Some people have SPD without autism
Some people have autism without significant sensory differences (less common)
The sensory processing challenges in autism and SPD appear very similar clinically

For practical purposes, the strategies for supporting sensory processing differences are the same regardless of whether the underlying condition is autism, SPD, or both.

The 8 Sensory Systems

Most people learn about 5 senses in school. But humans actually have 8 sensory systems, and understanding all 8 is essential for supporting your child.

1. Visual (Sight)

Hypersensitive (over-responsive):

Squints or shields eyes in normal lighting
Distressed by fluorescent lights (which actually flicker, though most people don’t perceive it)
Overwhelmed by visually busy environments (cluttered rooms, crowded stores)
Sensitive to certain colors or patterns
Difficulty with screen brightness

Hyposensitive (under-responsive):

Fascinated by lights, spinning objects, moving patterns
May stare at fans, wheels, or reflections
Doesn’t seem to notice visual cues others see easily

2. Auditory (Hearing)

Hypersensitive:

Covers ears for sounds others barely notice (hand dryers, vacuum cleaners, flushing toilets)
Distressed by sudden or unexpected sounds
Can hear sounds others don’t (fluorescent light buzzing, distant conversations)
Difficulty filtering background noise (can’t focus with ambient sound)
May melt down in noisy environments (cafeterias, assemblies, parties)

Hyposensitive:

Doesn’t respond to name being called
Seeks loud sounds or music
Makes loud vocalizations
May not notice sounds that should cause alarm

3. Tactile (Touch)

Hypersensitive:

Refuses certain clothing (tags, seams, specific fabrics)
Distressed by unexpected touch
Avoids messy play (finger painting, play dough, sand)
Particular about food textures
Dislikes haircuts, nail trimming, teeth brushing
Wipes away kisses or light touches

Hyposensitive:

Seeks deep pressure (tight hugs, weighted blankets, squeezing into tight spaces)
High pain tolerance — may not react to injuries
Touches everything and everyone
Mouths objects beyond the typical age

4. Gustatory (Taste) and Olfactory (Smell)

Hypersensitive:

Extremely picky eating based on taste and smell
Gags at certain food smells
Notices odors others don’t detect
Refuses to enter rooms with certain smells
May vomit from strong smells

Hyposensitive:

Seeks strong flavors (spicy, sour, salty)
Mouths or licks non-food items
Doesn’t notice spoiled food smells
May not react to unpleasant odors

5. Vestibular (Balance and Movement)

Hypersensitive:

Fear of swings, slides, or climbing
Gets carsick easily
Dislikes having head tilted (hair washing, looking up)
Avoids playground equipment
Anxious on uneven surfaces (grass, gravel, sand)

Hyposensitive:

Seeks spinning, swinging, rocking constantly
Never seems dizzy
Loves roller coasters and fast movement
Rocks body, spins in circles, hangs upside down
Craves movement and struggles to sit still

6. Proprioceptive (Body Position)

Hypersensitive:

Uncomfortable with physical activities
Difficulty gauging how much force to use (too gentle or too rough)
Awkward or stiff movements

Hyposensitive:

Crashes into things, people, and furniture
Seeks heavy lifting, pushing, pulling
Chews on non-food items (pencils, clothing)
Stomps feet while walking
Bears down hard when writing
Enjoys roughhousing, jumping, crashing into cushions

7. Interoception (Internal Body Signals)

This is the newest recognized sensory system — and one of the most impactful for autistic children.

Challenges with interoception:

Difficulty recognizing hunger or fullness (may forget to eat or overeat)
Doesn’t notice when they need the bathroom until it’s urgent
Can’t identify emotions based on body cues (doesn’t connect “racing heart” with “anxiety”)
Difficulty regulating body temperature (doesn’t realize they’re too hot or cold)
May not register pain until it’s severe

Why this matters: Many challenges parents attribute to behavior — not eating, toileting accidents, not dressing for weather, emotional explosions “out of nowhere” — may actually be interoception processing differences.

Assessing Your Child’s Sensory Profile

Professional Assessment

An occupational therapist (OT) is the primary professional for sensory processing assessment. They use:

Sensory Profile 2 (Winnie Dunn) — a parent/caregiver questionnaire that maps your child’s sensory patterns across all systems
Sensory Processing Measure (SPM) — assesses sensory processing in home and school environments
Clinical observation — the OT watches your child interact with sensory stimuli
Functional assessment — how sensory differences affect daily activities

Your child’s BCBA and OT should collaborate: the OT addresses sensory processing, the BCBA addresses behavioral responses to sensory challenges.

Home Observation

Start tracking your child’s sensory responses:

Sensory System	Seeks (Hyposensitive)	Avoids (Hypersensitive)
Visual
Auditory
Tactile
Taste/Smell
Vestibular
Proprioceptive
Interoception

Document: What triggers meltdowns? What calms your child? What do they seek out? What do they avoid? This information is invaluable for both OT and ABA therapy.

Strategies for Home and School

Environmental Modifications

Reduce sensory overload:

Replace fluorescent lights with natural light or warm-tone LED
Reduce visual clutter in your child’s spaces
Create a “calm-down corner” with reduced sensory input
Use noise-canceling headphones for loud environments
Provide soft, tag-free clothing options
Allow sunglasses indoors when lighting is uncomfortable

Increase sensory input (for seekers):

Provide a mini-trampoline or exercise ball for movement
Offer chewy foods or chew tools for oral input
Use weighted blankets or lap pads for deep pressure
Create a sensory bin with varied textures
Allow movement breaks throughout the day

Sensory Diet

A “sensory diet” is a personalized plan of sensory activities scheduled throughout the day to maintain optimal arousal — designed by an OT.

Sample sensory diet elements:

Time	Activity	Sensory System
Morning	Jump on trampoline 5 min	Vestibular, proprioceptive
Before school	Weighted backpack	Proprioceptive
Morning break	Chew gum or crunchy snack	Oral, proprioceptive
Lunch	Sit on cushion, eat preferred textures	Tactile, proprioceptive
Afternoon	Swing or rock	Vestibular
After school	Crash into cushions, heavy work	Proprioceptive
Evening	Warm bath with deep pressure massage	Tactile, proprioceptive
Bedtime	Weighted blanket, white noise	Tactile, auditory

Read our complete guide to sensory activities for autistic children for 25+ activity ideas organized by sensory system.

Gradual Desensitization

For sensory sensitivities that limit your child’s participation, gradual exposure can build tolerance:

Start far below the threshold (e.g., for a child who can’t tolerate haircuts: first just sit in the barber chair)
Pair with positive reinforcement
Gradually increase exposure (sit in chair → have hair touched → one snip → etc.)
Never force exposure beyond your child’s tolerance
Work with your OT and BCBA together for systematic desensitization

Find ABA providers near you who collaborate with occupational therapists on sensory-integrated treatment plans.

Frequently Asked Questions

Is sensory processing disorder a real diagnosis?

SPD is not listed as a standalone diagnosis in the DSM-5 (the primary diagnostic manual in the US), which means it’s not officially recognized by all insurance companies. However, it IS widely recognized by occupational therapists, researchers, and the medical community. Sensory processing differences can be addressed through OT services, and when they occur as part of autism, they’re covered under the autism diagnosis. The debate about SPD as a standalone diagnosis is ongoing in the clinical community.

How is SPD different from autism?

Autism involves differences in social communication AND restricted/repetitive behaviors, with sensory processing being one possible feature. SPD involves only sensory processing differences — without the social communication differences of autism. Many autistic people have SPD-like sensory differences. Some people have SPD without autism. The practical strategies for supporting sensory processing are similar regardless of the underlying diagnosis.

Can occupational therapy help with sensory processing?

Yes — OT is the primary intervention for sensory processing differences. An OT trained in sensory integration can assess your child’s sensory profile, design a sensory diet, recommend environmental modifications, and provide therapy to build sensory tolerance. OT and ABA therapy work well together: OT addresses the sensory processing directly, while ABA addresses behavioral responses to sensory challenges and teaches coping strategies.

Will my child grow out of sensory sensitivities?

Some sensory sensitivities may decrease with age and intervention, but many autistic individuals have lifelong sensory processing differences. The goal isn’t to eliminate sensitivity — it’s to develop coping strategies, environmental accommodations, and self-advocacy skills so sensory differences don’t limit participation. Many autistic adults learn to manage their sensory needs effectively through self-accommodation (choosing quieter restaurants, wearing comfortable clothes, using headphones).

How do I explain sensory needs to my child’s teacher?

Be specific: “My child is hypersensitive to sound. Unexpected loud noises (fire drills, PA announcements, cafeteria noise) cause genuine distress. They need access to noise-canceling headphones and advance warning when possible.” Share the sensory profile results from the OT assessment. Provide concrete accommodations rather than general descriptions. Include sensory accommodations in the IEP or 504 plan so they’re legally protected.

Take our matching quiz to find ABA providers who integrate sensory support into their programming.