Every educator needs to make a decision about technology they need to put in place. They're not sure if they should put Option A in place or Option B in place. This can be particularly difficult in the world of disabilities because there might not always be a perfect answer. Teachers can look to this solution, using the least dangerous assumption to make good decisions about what technology might be best.
When you're looking at setting goals for kids with complex communication needs, don't forget about setting goals that are about them interacting in the classroom. It's not just about punching buttons. It's not just about saying vocabulary words. It's about talking with people and showing who you are. Some specific goals that you can look at are in four areas. Educational goals, social goals, inclusion goals, and goals and independence.
When you don't have enough evidence about a student's performance, assume they can do whatever you're asking them to do.