Sensory processing differences are present in approximately 90% of people with ASD and constitute, for many of them, the most significant source of daily distress. Understanding how a person with ASD perceives the world sensorially is fundamental for any professional or family member wishing to offer genuine, effective support.
ASD / Autism
ASD and sensory processing: understanding hypersensitivity in autism
More than five senses: the eight sensory systems involved
| System | Perception | ASD manifestation |
|---|---|---|
| Tactile | Pressure, temperature, texture | Intolerance to clothing, tags, abrasions |
| Auditory | Volume, frequency | Hypersensitivity to sudden noises |
| Visual | Light, colour, movement | Discomfort with fluorescent lights |
| Proprioceptive | Body position | Difficulty calibrating force |
| Vestibular | Balance, movement | Actively avoiding or seeking rocking |
| Interoceptive | Internal body signals | Difficulty recognising hunger, thirst, pain |
Hypersensitivity vs hyposensitivity: two poles of the same spectrum
The same person can be hypersensitive (very intense reaction) in some systems and hyposensitive (reduced response) in others, varying with fatigue and anxiety levels. Examples: auditory hypersensitivity (a hand dryer is physically painful), proprioceptive hyposensitivity (difficulty calibrating force), pain hyposensitivity (undetected fractures), and interoceptive hyposensitivity (difficulty recognising hunger, thirst or bladder fullness).
Sensory overload and its behavioural impact
Sensory overload occurs when accumulated stimulation exceeds the nervous system's processing capacity. The result ranges from irritability and concentration difficulties to "meltdown" (complete overwhelm) or "shutdown" (dissociative withdrawal). It is crucial to understand this is not manipulative behaviour but a genuine physiological response. The appropriate response is immediate stimulus reduction and creating a safe space, not reprimand.
Sensory management strategies: what works
Managing atypical sensory processing combines: sensory diet (individualised programme of regulatory activities developed by an occupational therapist), environmental modification (noise-cancelling headphones, lighting control, tag-free clothing), self-regulation strategies (breathing techniques, sensory time-outs), and sensory integration therapy with a specialist occupational therapist.
Frequently asked questions
Selective eating in ASD often has a sensory basis: the texture, temperature, colour or smell of a food can generate an intense physiological rejection response, not a "tantrum". Pressure and forcing rejected foods typically worsens the problem.
A tantrum has a goal (getting something), progressive escalation and stops when the demand is met or consistently ignored. An ASD meltdown is an involuntary loss of control in response to overwhelm, without communicative purpose, that does not respond to ignoring or negotiation.
Want personalised guidance?
Take our free assessment and get a personalised neuropsychological profile in about 15 minutes.
Start free assessment