A study was performed to evaluate performance in entering English text on mobile devices by experienced users whose native language is not English and were experienced users of mobile devices and full keyboards. Two different mobile devices were used, they have virtual and physical keyboard, one of them have the full QWERTY keypad (single tap) and the other one have 14 keys keypad (multi-tap). Fifty subjects between the age of 19 and 44 years voluntary participated in the study, 22 of them are females and the rest are males. Subjects gave their opinions concerning learnability, accuracy, and efficiency. Subjects felt that the single tap method was easier to learn, more accurate and more efficient, than the multi-tap method, regardless of the type of keypad used.
Empirical Evaluation of Smart Phones Data Entry Using Four Different Keyboards
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