Ayres Sensory Integration® (ASI®), developed by Dr A. Jean Ayres, is an evidence-based therapeutic approach grounded in neuroscience (Ayres, 1972; Schaaf & Mailloux, 2015). It seeks to enhance the way the brain processes and organises sensory information so that individuals can participate more effectively in everyday activities.
This blog outlines the essential components of ASI®, while clarifying how it differs from the broader concepts of sensory integration and sensory stimulation.
What Is Ayres Sensory Integration® (ASI®)?
Ayres Sensory Integration® is an individualised, child-led, and play-based therapeutic approach that promotes more efficient sensory processing and adaptive responses (Ayres, 1979; Parham et al., 2011). It is always provided by a certified ASI® occupational therapist who adheres to the Ayres Sensory Integration® Fidelity Measure (Parham et al., 2007).
Key elements of ASI® include:
- Comprehensive assessment using standardised, valid tools such as the Sensory Integration and Praxis Tests (SIPT) or the Evaluation of Ayres Sensory Integration (EASI)
(EASI; Mailloux et al., 2018). - Intervention in a specialised ASI® clinic, equipped to support sensory-motor challenges using suspended equipment and opportunities for active sensory engagement (Schaaf & Mailloux, 2015).
- Fidelity-based practice, ensuring the therapy remains true to Ayres’ original theory and evidence (Parham et al., 2007).
- Active involvement, where the child is an active problem-solver rather than a passive recipient of inputs (Ayres, 1979).
ASI® intervention has been shown to support improved participation in daily occupations, self-regulation, motor planning, and functional independence (Schaaf et al., 2014).
Sensory Integration (SI): The Broader Concept
Sensory integration itself refers to the innate neurobiological process by which the brain organises sensory information so that an individual can engage in meaningful action (Ayres, 1972).
This natural process occurs continuously across the lifespan and supports learning, behaviour, emotional regulation, and adaptive functioning.
While ASI® is based on this theory, the terms are not interchangeable:
- Sensory Integration (SI) = the neurological process
- Ayres Sensory Integration® (ASI®) = the clinical approach grounded in Ayres’ theory and research
This distinction is important for practice, training, and research (Schaaf & Mailloux, 2015).
Sensory Stimulation: What It Is and What It Isn’t
Sensory stimulation refers to any sensory input provided to one or more sensory systems—touch, movement, vision, sound, taste, smell, proprioception, or vestibular input.
It may occur naturally during play or be intentionally provided by caregivers or professionals (Bundy et al., 2020).
Examples include:
- Climbing, swinging, or sliding on playground equipment
- Playing in sand, mud, or water
- Exploring textures during play
- Experiencing the natural sensory richness of outdoor environments
Sensory stimulation contributes to typical sensory development but is not ASI® intervention. Sensory stimulation is often passive and does not require the individual to generate adaptive responses, whereas this is a core component of ASI® (Parham et al., 2007; Schaaf & Mailloux, 2015).
While sensory-rich experiences are beneficial, they do not replace the precision, assessment-driven, fidelity-based approach of Ayres Sensory Integration®.
Why the Distinction Matters
Using these terms correctly supports:
- Appropriate referral pathways to trained ASI® therapists
- Accurate expectations about therapy outcomes
- Preservation of fidelity and integrity in ASI®-based practice
- Improved collaboration among parents, teachers, and professionals
SAISI advocates for fidelity-based ASI® practice to ensure consistent, research-aligned, and ethically sound services for individuals experiencing sensory integration challenges.
Conclusion
Sensory stimulation, sensory integration, and Ayres Sensory Integration® are related but distinct concepts. By understanding these differences, we ensure clarity, quality, and evidence-informed practice—ultimately supporting children and adults to participate more fully in their everyday lives.
