Examining the Validity and Reliability of Evaluation in Ayres Sensory Integration Data Collected With Autistic...

Area of Science:

• Occupational therapy
• Developmental psychology
• Pediatric neurology

Background:

• Sensory integration challenges are common in autistic children.
• Performance-based assessments offer objective data for interventions.
• The Evaluation in Ayres Sensory Integration (EASI) is a tool for assessing sensory and motor functions.

Purpose of the Study:

• To evaluate the validity and reliability of the EASI for autistic children aged 3-12 years.
• To assess the psychometric properties of EASI tests using the Rasch Measurement Model.
• To determine the suitability of EASI for clinical application in pediatric autism assessment.

Main Methods:

• Utilized the Rasch Measurement Model to analyze data from 146 autistic children across three countries.
• Evaluated 19 performance-based EASI tests assessing sensory perception, praxis, and motor functions.
• Examined item fit, unidimensionality, item targeting, and internal reliability of the EASI tests.

Main Results:

• Seventeen of 19 EASI tests demonstrated strong construct validity and adequate unidimensionality.
• Fourteen tests met the reliability threshold (person separation reliability ≥ 0.70).
• Five tests showed lower reliability, and some had poor item targeting for children with advanced skills.

Conclusions:

• Most EASI tests are valid and reliable for assessing sensory integration in autistic children.
• Clinicians can confidently use EASI tests meeting reliability standards; others require corroboration.
• This initial validation supports EASI as an advancement in evaluating sensory integration for autistic children.