One would expect that word prediction would be at its best when people use a scanning selection technique rather than a keyboard because of the slow selection speed. However, again, research indicates otherwise. The general lesson here is that an apparent improvement may not be an actual improvement. Further, such a system, by its very nature, can never become automatic. Automaticity is the unconscious and transparent use of a method.
Touch typing is a good example.
Automaticity is key to spontaneous communication. It allows the full cognitive energy to be devoted to the content rather than the process. The fastest people who rely on AAC are using systems that enhance and promote automaticity. Users report that, by combining these methods, the word prediction system does not need to include those items accessed by Minspeak and thus is more efficient. In the early days of AAC, there were few model users of systems.