Thumbs up: anthropometry of the first digit
Human Factors
Designing the user interface (videotape)
Designing the user interface (videotape)
Predicting text entry speed on mobile phones
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
Usability Engineering
Overcoming the Lack of Screen Space on Mobile Computers
Personal and Ubiquitous Computing
Reassessing current cell phone designs: using thumb input effectively
CHI '03 Extended Abstracts on Human Factors in Computing Systems
The converged appliance: "I love it... but I hate it"
OZCHI '05 Proceedings of the 17th Australia conference on Computer-Human Interaction: Citizens Online: Considerations for Today and the Future
Current practice in measuring usability: Challenges to usability studies and research
International Journal of Human-Computer Studies
A case-study of affect measurement tools for physical user interface design
GI '06 Proceedings of Graphics Interface 2006
SIMKEYS: an efficient keypad configuration for mobile communications
IEEE Communications Magazine
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The purpose of this study is to develop a framework of quantitative evaluation of PUI risk level to ensure the usability in designing mobile devices. Three PUI factors--key type, use scene and device form--were selected as the main criteria for PUI risk level. They are defined as Key Manipulation Value (KMV), Function Manipulation Value (FMV) and Handling Value (HV), considering the requirements. In short, this study provides a framework of quantitative evaluation with the requirements of the three PUI factors, and analyzes risk level by KMV, FMV and HV. This result can be utilized as a criterion for usability at the design phase. In addition, evaluation with this framework at the early design phase helps to anticipate the problems, so the opportunity to solve the problem can be offered in advance.