KIRKLAND, WA – November 21, 202] – The Washington Autism Alliance (WAA) today enthusiastically commended The Arc of Massachusetts for the release of their vital new findings on state-funded pilots demonstrating the success of Applied Behavior Analysis (ABA) for adults with autism and intellectual and developmental disabilities (IDD) who have complex needs.

The study, which examined adults between the ages of 22 and 68, provides compelling, evidence-based data that supports the expansion of ABA services to adults—a critical gap in care once individuals age out of youth services.

Key findings from The Arc of Massachusetts study demonstrate:

• Skill Development and Independence: Participants in day habilitation programs learned an average of five new, meaningful skills per month over six months in areas such as communication, hygiene, and independent living.
• Reduction in Challenging Behaviors: The use of ABA resulted in a significant 23% reduction in maladaptive behaviors, including self-injury, aggression, and elopement.
• Cost-Effectiveness: The successful outcomes confirm that investing in ABA supports helps to reduce long-term system costs by proactively avoiding expensive crisis-based or institutional responses.
• Workforce Support: The pilots provided ABA-informed training to over 400 direct support professionals, leading to greater confidence in addressing complex behaviors and ultimately reducing provider burnout.

“The Arc of Massachusetts has delivered an undeniable case for expanding permanent, accessible, and high-quality behavioral treatment for adults with complex needs,” said Arzu Forough, President and CEO of the Washington Autism Alliance. “This research is not just important; it’s a roadmap for state policymakers across the country, including here in Washington, to implement effective, compassionate, and fiscally responsible care models.”

“Despite a 2020 settlement in the state of Washington mandating Medicaid coverage of medically necessary Applied Behavior Analysis for adults with intellectual and developmental disabilities, including autism, the Washington Healthcare Authority has failed to develop an adequate network of licensed ABA providers after five years,” added Forough.

The Washington Autism Advocacy (WAA) fully supports efforts to ensure that Apple Health-eligible adults can access these vital services. The WAA urges the Washington State Healthcare Authority to acknowledge these findings and implement measures to close the service gap in adult behavioral health.

About the Washington Autism Alliance

The Washington Autism Alliance (WAA) is a leading advocacy organization dedicated to ensuring children and adults with autism and intellectual and developmental disabilities (IDD) have access to medical, educational, and legal supports. WAA works to improve the lives of individuals and families across Washington State through systemic change and direct support.