An AAC assessment should be done by a Speech Language Pathologist (SLP) or an Assistive Technology (AT) specialist with experience in AAC. It may be done at school or in a private setting. It’s an important first step in your communication journey. An evaluation can help to determine tools, methods and strategies to implement AAC and maximize communication. Individuals with Angelman Syndrome are extremely difficult to assess for cognitive and communication skills. This is because of difficulties like anxiety, apraxia, and visual and/or fine motor difficulties. The following free and paid tools may be useful in the assessment of those with Angelman Syndrome:
  • The Communication Matrix is a free, online tool which is criterion referenced and based on ongoing observation. It creates a clear picture of current communication skills, even if there is a significant scatter in abilities.
  • The Communication Support Inventory for Children and Youth is a free assessment based on the participation model of AAC. This inventory examines communication skills in contrast to peers as well as other factors that may be supportive of or barriers to communication.
  • The Bridge is an early literacy and language assessment based on observation and portfolio analysis
  • The School Function Assessment (SFA), available from Pearson, is a multidisciplinary, observation based assessment of functional skills.


A language system can be low tech like a book, or high tech like a speech generating device, or both. Language systems have different symbols sets and layouts. They can be an app on an iPad or on a dedicated device. Communication systems can be worn on a harness or mounted on a wheelchair. The best communication system is the system that works! Here are popular robust language systems commonly used with individuals with Angelman Syndrome: