This is a continuation of a series on why I think it’s a mistake to ignore nonverbal communication in an attempt to force someone to use AAC. (The short version: it’s disrespectful, it undermines someone’s ability to communicate, and it prevents people from developing a valuable skill.)
One reason nonverbal communication is important for AAC users is that you always have your body with you. That is not necessarily the case for AAC devices.
AAC best practices say that someone should have them available constantly. In practice, people don’t. This is for several reasons. One is that it’s not practical to take a device to some places (for instance, most people are not willing to take a high tech device to the beach, and low tech devices are a lot more limiting.) Another reason is that sometimes people forget, or vastly underestimate how close a device needs to be in order to be immediately available. Or any number of reasons, some innocent and some horrifying, and many a mixture of both.
Also, people take devices away from AAC users. They shouldn’t, but they do. Sometimes it’s accidental; sometimes it’s on purpose. It’s never ok, but people do it a lot. If you’re teaching a nonverbal child to communicate, you need to keep this in mind when you’re considering what to teach them. You can’t assume that people will always treat them appropriately, and you can’t assume that they will always have their device. If they are capable of communicating with their body, it is an important skill for them.
Whatever else happens, someone always has their body with them. People can do a lot more if they can use their body to communicate. Communicating in body language can make it possible to communicate in a swimming pool. It can make it possible to communicate with dirty hands. It can make it possible for someone to indicate that their device isn’t within reach and that they need it. It can make it possible to communicate about pain in medical situations. It can make it possible to communicate when someone else doesn’t want you to, and has taken your device away. It can make friendship possible that otherwise wouldn’t be. And any number of other things, all of which are important.
And in order to be able to communicate with body language, people need opportunities to practice and develop this skill. If you ignore someone’s nonverbal communication to encourage AAC use, you’re making it harder for them to develop comprehensible body language. That’s not a good idea, because comprehensible body language is important. People won’t always have access to their device. They will always have their body.
tl;dr Nonverbal communication is important for nonverbal people, but parents are often encouraged to pretend not to understand it in order to encourage AAC use. This makes it harder for people to develop body language that others can understand. One reason this is a problem is that people don’t always have access to their devices, but people *do* always have access to their bodies. Nonverbal people should have support in developing nonverbal communication, because it is an important skill.