The purpose of the Evaluation in Ayres Sensory Integration (EASI) is to provide a valid and reliable set of tests for assessing key sensory integration functions which underlie learning, behaviour, and participation. TheEASI measures sensory perception, postural/ocular/bilateral motor integration, praxis, and sensory reactivity, in a manner that minimizes the influences of culture, language comprehension, and prior experience.  The EASI tests are designed for children 3-12 years of age and will be made available to appropriately trained professionals in a low-cost and accessible format.

Priorities in developing the EASI

• Comprehensiveness: inclusion of core functions required to fully assess sensory integration and to identify patterns of dysfunction so that participation challenges can be understood and addressed appropriately and effectively.
• Time: administration of 1-1.5 hours, eventually using predictive technology to guide basal and ceiling points to ensure testing of most critical items for age and functioning level.
• Scoring: methods designed to be as simple and straightforward as possible.
• Materials: test sheets and forms developed to be printed on home printers with measurements designated for various paper sizes used in different countries; non-paper materials are readily available as items that can be purchased or printed via 3D printing, at a low cost for both initial and replacement pieces; consideration to keep materials as minimal, simple and light-weight as possible.

Constructs

The specific tests of the EASI are founded on the constructs of Ayres Sensory Integration® (ASI) which have been developed and refined through research since the 1960s, as follows:

Sensory Perception Tactile Proprioception Vestibular Visual Auditory Localization	Praxis Somatosensory Based Praxis Ideation Based Praxis Visual Based Praxis Language-Based Praxis
Ocular-Postural-Bilateral Motor Integration Ocular Motor/Ocular Praxis Postural Control & Balance Bilateral Integration	Sensory Reactivity Hyper-reactivity Hypo-reactivity

Taken from EASI Manual 15 August 2018