The second fundamental parameter is the average time it takes a user to look at a predictive text suggestion and select it. We estimated this at 0.26 seconds, based on earlier research. The first is the average time it takes a user to hit a key on the keyboard (essentially a measure of their typing speed). We built a couple of fundamental parameters associated with predictive text performance into our simulation. We combined some of these conditions, or parameters, to simulate a large number of different scenarios and therefore determine when predictive text is effective – and when it’s not. In my most recent study on this topic, a colleague and I explored the conditions that determine whether predictive text is effective. The idea seems to make sense: if the system can predict your intended word before you type it, this should save you time. It’s interesting to consider the poor correlation between predictive text and typing performance. But why? VAKS-Stock Agency/Shutterstock Breaking it down Research has shown using predictive text doesn’t improve typing speed.

Keyboard predictive text