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Authors Zachary Friedman - zf@wam.umd.edu Abstract As cellular phones are becoming more widely used in society, data entry into these devices becomes an important issue. This paper describes an experiment that compares two different methods of inputting data into cellular phones, using T9 technology and 12-key keypad. The experiment involved a training session, practice time, and then some text entry tasks. We hoped to find out which method of input had better performance time and higher user satisfaction. We also hoped to determine whether users were more likely to purchase and use cellular phones which had T9 technology or standard input. Finally, we wished to investigate issues of frustration using T9, a new and unfamiliar technology.
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