The Impact of Number of Predictions on User Performance in a Dwell Keyboard

Jiban Adhikary, Max Isom, Keith Vertanen

MobileHCI 2022 Workshop on Shaping Text Entry Research for 2030, 2022.

Word predictions in a text entry interface can help accelerate a user's input. This may especially be true for users who have a slow input rate due to some form of motor-impairment. The choice of how many word predictions to offer in a text entry interface is an important design decision. In this work, we offered different number of word predictions in a keyboard where able-bodied users had to dwell on a key for one second to click it. We found participants' text entry rate did not improve with increasing number of predictions.