BibTeX
@inproceedings@inproceedings{MacKenzie:MTT:2002, title = {A Model of Two-Thumb Text Entry}, author = {I. Scott MacKenzie and R. William Soukoreff}, booktitle = (Proceedings of the Graphics Interface 2002 Conference, May 27-29, 2002, Calgary, Alberta, Canada}, url = {http://graphicsinterface.org/wp-content/uploads/gi2002-14.pdf}, year = {2002}, month = {May}, location = {Calgary, Alberta}, pages = {117--124} }
Abstract
Although text entry has been extensively studied for touch typing on standard keyboards and finger and stylus input on soft keyboards, no such work exists for two-thumb text entry on miniature Qwerty keyboards. In this paper, we propose a model for this mode of text entry. The model provides a behavioural description of the interaction as well as a predicted text entry rate in words per minute. The prediction obtained is 60.74 words per minute. The prediction is based solely on the linguistic and motor components of the task; thus, it is a peak rate for expert text entry. A detailed sensitivity analysis is included to examine the effect of changing the model's components and parameters over a broad range (+/-50% for the parameters). The model demonstrates reasonable stability - predictions remain within about 10% of the value just cited.