Extending Fitts' law to two-dimensional tasks
CHI '92 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Predicting text entry speed on mobile phones
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
The keystroke-level model for user performance time with interactive systems
Communications of the ACM
Chinese input with keyboard and eye-tracking: an anatomical study
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Text input for mobile devices: comparing model prediction to actual performance
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The Psychology of Human-Computer Interaction
The Psychology of Human-Computer Interaction
Combined model for text entry rate development
CHI '03 Extended Abstracts on Human Factors in Computing Systems
Model for non-expert text entry speed on 12-button phone keypads
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Performance of menu-augmented soft keyboards
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
International Journal of Human-Computer Studies - Special issue: Fitts law 50 years later: Applications and contributions from human-computer interaction
International Journal of Human-Computer Studies - Special issue: Fitts law 50 years later: Applications and contributions from human-computer interaction
A predictive model of menu performance
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Chinese pinyin phrasal input on mobile phone: usability and developing trends
Mobility '07 Proceedings of the 4th international conference on mobile technology, applications, and systems and the 1st international symposium on Computer human interaction in mobile technology
Constructing Chinese characters: keypad design for mobile phones
Behaviour & Information Technology
RotaTxt: Chinese pinyin input with a rotator
Proceedings of the 10th international conference on Human computer interaction with mobile devices and services
Investigating five key predictive text entry with combined distance and keystroke modelling
Personal and Ubiquitous Computing
Information theoretic models of HCI: a comparison of the Hick-Hyman law and Fitts' law
Human-Computer Interaction
Proceedings of the 2007 conference on Human interface: Part II
PinyinPie: a pie menu augmented soft keyboard for chinese pinyin input methods
MobileHCI '12 Proceedings of the 14th international conference on Human-computer interaction with mobile devices and services
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Chinese text entry on mobile phones is critical considering the large number of Chinese speakers worldwide and as a key task in many core applications. But there is still a lack of both empirical data and predictive models that explore the pattern of user behavior in the process. We propose a model to predict user performance with two types of Chinese pinyin input methods on mobile phones. The model integrates a language model (digraph probability) with Fitts' law for key presses, a keystroke-level model for navigation, and a linear model for visual search in pinyin marks and Chinese characters. We tested the model by comparing its predictions with the empirical measures. The predictions are satisfactory and the percentage differences are all within 4% of the empirical results, suggesting that the model can be used to evaluate user performance of Chinese pinyin text entry solutions on mobile phones.