One-Handed Mobile Text Entry

Abstract

Abstract:This paper addresses text entry techniques for miniature or wearable devices. Five keys are used for interaction control -one key for each finger. Tree approaches are examined: one dictionary-independent technique (multi-tap), a partially dictionary-dependent technique (tree-based) and a dictionary dependent technique (one-stroke). The study shows that users can type text at rates of up to 30 characters-per-minute after just 5 minutes of practice using the one-stroke approach. Although the proposed methods are slower than chord-based techniques they do not require the same amount of training that is required to acquire and maintain chording skills. Consequently, the proposed strategies are suitable for users that only type texts on a small device occasionally.