Life in the Fast Lane: Effect of Language and Calibration Accuracy on the Speed of Text Entry by Gaze
Numerous techniques have been developed for text entry by gaze, and similarly, a number of evaluations have been carried out to determine the efficiency of the solutions. However, the results of the published experiments are inconclusive, and it is unclear what causes the difference in their findings. Here we look particularly at the effect of the language used in the experiment. A study where participants entered text both in English and in Finnish does not show an effect of language structure: the entry rates were reasonably close to each other. The role of other explaining factors, such as calibration accuracy and experimental procedure, are discussed.
KeywordsText entry Gaze input Performance Entry speed Error rate Comparative evaluation Longitudinal study
I am grateful to Per Ola Kristensson for suggesting this experiment and to Päivi Majaranta, Poika Isokoski, Saila Ovaska and Oleg Špakov for discussions and comments on the manuscript. In particular, Oleg Špakov implemented the soft keyboard and the gaze tracking algorithm used in the experiment. The statistical analysis was done using I. Scott MacKenzie’s Java tools (http://www.yorku.ca/mack/RN-Anova.html). Finally, the participants in the experiment were committed and responsible – thank you very much!
This work was supported by the Academy of Finland (project MIPI).
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