Sensory processing differences are increasingly recognised within contemporary disability and occupational therapy practice as an important factor influencing participation, wellbeing and engagement in daily occupations. Individuals may experience differences in how they detect, interpret, organise and respond to sensory information from their internal and external environments.

Sensory processing differences may occur across multiple sensory systems, including:

• auditory processing;
• visual processing;
• tactile processing;
• proprioceptive awareness;
• vestibular processing;
• olfactory and gustatory processing;
• interoceptive awareness.

These differences may influence how a person experiences environments, interacts with others, manages daily activities and participates in meaningful occupations.

Within assistance animal practice, it is important to recognise that sensory processing differences alone do not automatically indicate that an assistance dog is appropriate. The role of the occupational therapist is not to match a diagnosis or sensory profile to an animal, but to determine whether a trained assistance dog may address specific functional barriers and support meaningful occupational goals.

Understanding Sensory Processing

Sensory processing refers to the neurological processes involved in receiving sensory information, organising that information and generating an appropriate response.

The nervous system continuously receives information from the environment and the body, including information about:

• sounds;
• movement;
• touch;
• temperature;
• body position;
• internal sensations;
• visual input.

For many people, sensory information is automatically filtered and organised, allowing them to focus attention on relevant information while ignoring less important input. However, some individuals experience differences in this process, meaning sensory information may be experienced as overwhelming, insufficient, unpredictable or difficult to interpret.

Sensory processing differences may affect:

• emotional regulation;
• attention;
• fatigue;
• communication;
• participation;
• transitions;
• daily routines;
• community access.

The impact is highly individual. One person may find a particular sensory experience calming, while another person may find the same experience distressing or overwhelming.

Sensory Modulation Differences

One area of sensory processing relates to sensory modulation, which describes the ability of the nervous system to regulate responses to sensory information.

Some individuals may experience sensory over-responsivity, where sensory input is detected as intense or threatening.

Examples may include:

• distress in noisy environments;
• difficulty tolerating unexpected touch;
• discomfort with crowded spaces;
• strong responses to smells, lights or textures.

Other individuals may experience sensory under-responsivity, where sensory information may not be detected strongly enough, resulting in reduced awareness of environmental or body signals.

Some individuals may also seek increased sensory input through behaviours such as:

• movement;
• pressure;
• repetitive actions;
• interaction with particular textures or sensations.

These responses are not inherently problematic. Difficulties generally arise when sensory processing differences create barriers to participation, safety, wellbeing or independence.

Sensory Processing and Disability

Sensory processing differences may occur across a range of disability experiences and health conditions, including:

• autism;
• intellectual disability;
• acquired brain injury;
• neurological conditions;
• developmental disabilities;
• mental health conditions;
• trauma-related conditions.

However, sensory processing differences can also occur independently of a formal diagnosis.

Contemporary practice recognises that sensory experiences are part of the individual’s broader interaction with their environment. Occupational therapists therefore consider not only the sensory characteristics of the person, but also:

• environmental demands;
• expectations;
• supports;
• accessibility;
• meaningful activities.

A person may experience significant sensory barriers in one environment but participate successfully in another environment where appropriate adjustments are available.

The Potential Role of Assistance Dogs in Sensory Processing Support

Assistance dogs may support some individuals who experience sensory processing differences; however, the role of the dog must be clearly defined through functional assessment.

An assistance dog is not simply a “sensory tool” or a source of general comfort. The defining feature of an assistance dog is that it performs trained behaviours or tasks that address disability-related functional needs.

Potential roles may include supporting:

• transitions between activities;
• predictable routines;
• safety awareness;
• community participation;
• communication access;
• regulation strategies;
• independence.

The suitability of any task depends on the individual person, their environment and the capabilities of the specific animal.

Deep Pressure and Physical Contact-Based Tasks

One area commonly discussed in relation to sensory processing and assistance dogs is physical contact or pressure-based tasks.

Some assistance dogs are trained to provide behaviours involving physical proximity or contact, which some individuals report as supporting emotional regulation or reducing distress.

However, professionals must carefully distinguish between:

• an animal naturally providing comfort through companionship; and
• a trained assistance task designed to address a specific functional need.

Any physical task involving pressure, weight or restriction requires careful consideration of:

• the individual’s needs;
• consent;
• communication ability;
• safety;
• animal size and physical capacity;
• risk of injury or distress.

Animal welfare must remain central. A dog should never be expected to provide physically demanding behaviours that exceed its capabilities or create an unreasonable burden.

Autism and Sensory Processing Differences

Sensory processing differences are frequently discussed in relation to autistic people. Autistic individuals may experience differences in sensory perception, including heightened or reduced responses to sensory information.

These differences may influence:

• participation in education;
• employment;
• community environments;
• social interactions;
• self-care;
• daily routines.

An autism assistance dog may support an autistic person when there is a clear functional need and when the partnership aligns with the individual’s goals and preferences.

The presence of sensory differences alone does not determine that an assistance dog is required. Assessment should consider whether the animal provides meaningful benefit compared with other supports, including:

• environmental modifications;
• sensory accommodations;
• communication supports;
• assistive technology;
• human support.

Sensory Processing, Regulation and Avoiding Misinterpretation

A common misconception is that assistance dogs “calm” people with sensory processing differences simply through their presence.

While many people experience emotional benefits from their relationship with an animal, professional practice requires clarity about the mechanism of support.

An assistance dog may contribute through:

• predictable routines;
• trained responses;
• environmental support;
• increased confidence;
• improved participation.

However, it should not be represented as a universal intervention for sensory regulation.

A high-quality assessment identifies:

• what specific barrier exists;
• what task or behaviour addresses that barrier;
• how outcomes will be measured;
• whether the partnership is sustainable.

Occupational Therapy Considerations

When considering an assistance dog for sensory processing-related needs, occupational therapists should apply occupation-based reasoning rather than diagnosis-based assumptions.

Assessment should explore:

• Which occupations are affected by sensory processing differences?
• In what environments do barriers occur?
• What strategies are currently effective?
• What goals does the person identify as meaningful?
• Would an assistance dog provide additional functional benefit?
• Can the person and animal develop a sustainable partnership?

The focus should remain on participation rather than eliminating sensory differences.

Sensory processing differences are part of human diversity, and intervention should aim to support autonomy, accessibility and meaningful engagement rather than requiring individuals to conform to environments that do not accommodate them.

Key Practice Principle

An assistance dog supporting sensory processing differences is not a replacement for sensory supports, environmental modification or human assistance. The value of the partnership lies in whether the animal performs appropriate, trained tasks that reduce disability-related barriers and enhance participation.

The question is not:

“Does this person have sensory processing differences?”

The question is:

“Would an appropriately selected and trained assistance dog provide meaningful, sustainable support for this person’s occupational goals, environment and quality of life while maintaining animal welfare?”

I would place this after Autism Assistance Dogs in your Contemporary Roles section, because sensory processing differences are often discussed within autism assistance dog practice but also occur across many disability groups.