The trial enrolled sixty-three children and randomized them into two groups, with thirty-two children assigned to receive Ayres Sensory Integration in addition to their usual individualized education program, and thirty-one children continuing with their usual care alone. Sixty children completed the study, thirty in each arm, and these completers formed the final analysis sample. Over twelve weeks, the intervention group accumulated approximately thirty-six hours of sensory integration therapy on top of their standard programming. This design is important because it isolates the added value of the sensory intervention rather than simply comparing therapy against nothing, a common weakness in earlier studies of complementary approaches in autism care.

Ayres Sensory Integration, developed by occupational therapist and psychologist A. Jean Ayres in the mid-twentieth century, rests on a specific neurological premise. The theory holds that many difficulties in attention, behavior, and motor coordination stem from inefficient processing and integration of sensory information, particularly input from the vestibular, proprioceptive, and tactile systems. Therapy sessions therefore take place in specially equipped gyms where trained occupational therapists deliberately engineer playful activities, such as swinging, climbing, and tactile exploration, that provide intensified sensory challenges calibrated to each child’s nervous system. Crucially, the child’s active engagement and the therapist’s responsive adjustment of the activity are considered central ingredients, distinguishing the approach from passive sensory stimulation.

Because the approach depends heavily on the skill and consistency of the therapist, the trial incorporated a formal fidelity mechanism. The researchers used the Ayres Sensory Integration Fidelity Measure, a structured instrument designed to verify that delivered sessions actually conform to the essential elements of the original method. Sessions in the study scored a mean of approximately 92.9 on this measure, meeting the criteria recommended for authentic implementation. This detail matters enormously for interpreting the findings. Many past trials of sensory-based interventions have been criticized for delivering diluted or ill-defined versions of the therapy, making it impossible to know whether negative results reflected the method itself or its poor execution. Here, the intervention was demonstrably delivered as intended.

The primary functional outcomes were assessed with the Vineland Adaptive Behavior Scales, Second Edition, a standardized parent-report interview that measures real-world adaptive functioning across domains such as communication, daily living skills, and socialization. After the twelve-week intervention, the clearest between-group difference emerged in the Daily Living Skills domain, where the sensory integration group showed a statistically significant advantage with a p-value of .042. The total adaptive behavior composite approached but did not reach conventional significance, with a p-value of .055. The authors are careful in their framing: the findings suggest that adding sensory integration to usual care may support daily living skills, while other adaptive domains did not demonstrate clear separation between the groups in this sample size.

Perhaps the most striking result came from Goal Attainment Scaling, an individualized outcome method in which each child’s therapy team defines specific, personalized goals at the outset and then quantifies progress toward them on a standardized scale. This approach acknowledges that autism presents heterogeneously and that a single standardized checklist may miss changes that are profoundly important to a particular child and family. On this measure, the sensory integration group posted a mean post-intervention score of 1.65 compared with 0.69 in the usual care group, a difference that was highly significant at p less than .001. The between-group effect size, expressed as r equal to .48, falls in the large range, indicating that children receiving the added therapy made substantially greater progress on their own individually tailored objectives.

The trial also examined changes in sensory processing patterns using the Sensory Profile, a caregiver questionnaire that characterizes how children respond to sensory stimuli in everyday life. Between-group differences were identified in several processing domains, including vestibular processing with a p-value of .004, auditory processing at p equal to .021, and visual processing at p equal to .031, along with differences in multiple factor scores of the instrument. These changes are theoretically coherent with the intervention’s mechanism, since vestibular stimulation is a signature component of Ayres-style sessions. However, the authors present these as observed between-group differences in sensory processing domains rather than as proof of a causal sensory-to-function pathway, an appropriate level of caution given the exploratory nature of secondary outcomes.

Methodological transparency is a notable strength of the report. The trial was registered on ClinicalTrials.gov under identifier NCT07507630, although the registration on 27 March 2026 was retrospective, a limitation that readers should weigh when interpreting outcome selection. The study was single-blind, meaning that while families and therapists necessarily knew which children received the intervention, outcome assessors were blinded to group assignment, reducing bias in the measurement of endpoints. Ethical approval was obtained from a Clinical Research Ethics Committee, the protocol adhered to the Declaration of Helsinki, and written informed consent was secured from the parents or legal guardians of all participating children, including separate consent for video recording. The authors declared no competing interests and received no specific funding for the research.

For the broader field, the trial lands in the middle of a long-running scientific argument. Systematic reviews of sensory integration therapy for autism have historically been divided, with some analyses finding insufficient evidence and others identifying promising signals when fidelity-monitored protocols are used. This study strengthens the case that when the intervention is delivered by trained therapists under fidelity monitoring, added to rather than replacing standard educational programming, measurable functional benefits can be detected in young children. At the same time, the modest sample of sixty completers, the retrospective registration, and the mixed pattern of significance across the Vineland domains mean the results should be read as encouraging rather than definitive. Replication in larger, multi-site cohorts with long-term follow-up remains the essential next step.

The practical implications for families and clinicians are nonetheless tangible. The combination of a significant gain in daily living skills, a large effect on individually set goals, and converging changes across several sensory domains offers a coherent, internally consistent picture: a twelve-week, roughly thirty-six-hour course of authentic Ayres Sensory Integration, layered onto existing individualized education, helped these preschoolers function more independently and reach targets their own care teams considered meaningful. As pressure grows for evidence-based early intervention in autism, trials of this kind, with fidelity measurement, blinded assessment, and individualized outcome metrics, provide the methodological rigor needed to move the sensory integration debate from ideology toward data.

Subject of Research: Ayres Sensory Integration therapy for preschool children with autism spectrum disorder

Article Title: Effectiveness of Ayres Sensory Integration® in autism spectrum disorder: randomized controlled trial

Article References: Effectiveness of Ayres Sensory Integration® in autism spectrum disorder: randomized controlled trial. (n.d.). https://doi.org/10.1186/s12887-026-07777-4

Image Credits: AI Generated

DOI: 10.1186/s12887-026-07777-4

Keywords: Ayres Sensory Integration, autism spectrum disorder, randomized controlled trial, occupational therapy, sensory processing, preschool children, Vineland Adaptive Behavior Scales, Goal Attainment Scaling, adaptive behavior, pediatric rehabilitation, vestibular processing, BMC Pediatrics