Supports Intensity Scale®

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Supports Intensity Scale® 

AAIDD is the publisher, copyright holder, and sole owner of the SIS, SIS-A. SIS-C, SIS-A Annual Review Protocol, and Person-Centered Planning With the Supports Intensity Scale-Adult Version™: A Guide for Planning Teams (2017). The suite of SIS tools also includes all associated interview scoring forms, user’s guides, training manuals and materials, and associated electronic software platforms, most notably SISOnline and SISVenture. The SIS-A is a standardized assessment tool designed to measure the pattern and intensity of supports that a person aged 16 years and older with intellectual disability requires to be successful in community settings. First launched in 2004, the assessment tool was developed by AAIDD over a five-year period from 1998 to 2003 and normed with over 1,300 culturally diverse people with intellectual and developmental disabilities aged 16–72 in 33 states and two Canadian provinces. The psychometric properties of the tool are strong: research published in peer-reviewed journals around the world continuously demonstrates the reliability and validity of the SIS-A.

  • SIS-A Annual Review Protocol (2017)

  • Person-Centered Planning With the Supports Intensity Scale -- Adult Version™​ (2017)

  • Supports Intensity Scale - Children's Version™ (SIS-C™) (2016)

  • Supports Intensity Scale - Adult Version™ (SIS-A™) (2015)

  • Supports Intensity Scale (SIS™) Classic™ (2004)





The usefulness of the SIS-A, according to families and other respondents.

What the SIS-A Does

The SIS-A evaluates practical support requirements of a person with an intellectual disability through a positive and thorough interview process. Read more.

Contact Us:

202-387-1968, ext 215

Have you considered SIS-A for transition planning for students?

The SIS-A has all the domains required to successfully identify post-secondary support needs of a student with intellectual disability, mandated by the Individuals with Disabilities Act (IDEA). Read more.

Selecting the Right Trainers

The selection of those who will train assessors is central to a state or organization’s strategy for  successfully implementing SIS-A or SIS-C.

 These guidelines help you choose the right individuals to become SIS Trainers.

FAQs about SIS-A and SIS-C

From seeking sample interview forms to questions on conducting a pilot program, here's what your colleagues are asking about the Supports Intensity Scale.

Tips to Enhance a SIS-A Interview

The effectiveness of SIS-A as a planning tool depends on how well the interview is conducted. See these tips tips on conducting a comprehensive SIS-A interview from AAIDD SIS Trainers.