Predicting text entry speed on mobile phones
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
Text Entry Systems: Mobility, Accessibility, Universality
Text Entry Systems: Mobility, Accessibility, Universality
Mobile text-entry models for people with disabilities
ECCE '08 Proceedings of the 15th European conference on Cognitive ergonomics: the ergonomics of cool interaction
NavTap: a long term study with excluded blind users
Proceedings of the 11th international ACM SIGACCESS conference on Computers and accessibility
TypeInBraille: a braille-based typing application for touchscreen devices
The proceedings of the 13th international ACM SIGACCESS conference on Computers and accessibility
SlideType: universal design text-entry interface for touchscreen devices
Proceedings of the 15th International ACM SIGACCESS Conference on Computers and Accessibility
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Motivation -- Understand how NavTap, an assistive text-entry method, stands in relation to traditional approaches. Research approach -- We performed a between-subjects text-entry study with 12 blind users proficient with MultiTap and five blind users proficient with NavTap. Participants were asked to input ten sentences with different length and complexity. Findings/Design -- MultiTap significantly outperformed NavTap when considering text entry speed, confirming its theoretical advantage. However, when considering method effectiveness, NavTap's less experienced participants committed significantly fewer errors, indicating that it is both easier to learn and use, reaffirming it is an alternative for those unable to adjust to demanding adaptations. Research limitations/Implications -- Before NavTap appeared its users were unable to input text in a mobile device. Indeed, existing data make it difficult to assess differences between the users of either method. Further, NavTap users had less experience using the method (four months) than MultiTap (years). Originality/Value -- We contribute to understanding the limitations and merits of different text-entry approaches for blind people, after extensive usage. Take away message -- Different methods have different limitations and values. Selecting a match for a particular user may depend on his individual differences.