This study addresses the problem of generating an optimised keyboard layout for single-finger typing on a smartphone. It offers Twitter users a tweet-typing experience that requires less effort and time. Bodies of tweet text for 85 popular Twitter users are used. While existing studies have produced optimisations that may generally benefit a variety of users, this study is unique in the sense that a bespoke optimised keyboard layout is generated for each Twitter user based on their own tweets, thereby uniquely benefiting them more than other users. The optimisation process is based on moving only six letter keys from their positions on the QWERTY keyboard, and therefore strikes an effective balance between the typing efficiency improvements offered by an optimised keyboard layout and the effort required to learn to use it. It is shown that a Twitter user will enjoy a reduction in typing effort of at least 13.4%. The typical user will benefit from a 15.8% reduction, while the highest typing effort reduction is nearly 25%. The method presented in this study could therefore be used in practical ways to offer any Twitter user a uniquely-improved tweeting experience.

翻译：本研究针对智能手机单指打字场景，提出一种生成优化键盘布局的方法，旨在为Twitter用户提供更省力省时的推文输入体验。研究基于85位热门Twitter用户的推文文本数据。现有研究虽已提出普遍适用于不同用户的优化方案，但本研究的独特之处在于：根据每位用户自身的推文内容为其生成定制化优化键盘布局，从而使该用户获得比其他用户更显著的使用效益。优化过程仅涉及将QWERTY键盘上的六个字母键重新排布，因此能在优化键盘布局带来的输入效率提升与用户学习使用新布局所需精力之间达成有效平衡。研究表明，Twitter用户的打字负担将至少降低13.4%，典型用户可获益15.8%，而最高打字负担降幅接近25%。本研究所提出的方法可实际应用于为任意Twitter用户提供独具特色的推文输入体验优化。