Abstract
In many user interfaces with restricted input capabilities, a time-out is used to automatically change the user interface (UI) from one mode to another. In this paper, we study the learning of time-outs and the effect of feedback on it in the case of mobile phone text entry. The effects of three different feedback schemes (auditory/visual/no feedback) on the learning of two different time-out lengths were compared. We measured the response time (RT) from the time-out occurrence to the time of the user’s action. Error rates and the development of the RTs in different schemes were used as measures of learning. We also studied if the users learned to estimate the time-out lengths, or if they just reacted to the available feedback. There were three main findings. Without feedback, RTs had a great variation. Auditory feedback enabled faster RTs than visual feedback. Finally, we found evidence of short-term learning, but not much of a lasting effect. The possible application of adapting time-out length to user RT is discussed.
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We would like to thank Mr. Miika Silfverberg for providing information on adaptive time-out.
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Marila, J., Ronkainen, S. Time-out in user interface: the case of mobile text input. Pers Ubiquit Comput 8, 110–116 (2004). https://doi.org/10.1007/s00779-004-0264-0
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DOI: https://doi.org/10.1007/s00779-004-0264-0