Abstract
This study evaluated the value of pull-down, radio button, and text box, input interfaces based on the evaluation system of instruction for using mobile phones. In Experiment 1, 36 university student participants inputted specific values on their mobile phones. The results of input time analysis indicated that the input time in the pull-down condition and the radio button condition were shorter than in the text box condition. In Experiment 2, participants were divided into 4 groups, 3 in mobile phone and 1 PC conditions and they conducted the same task under the same instructions, input conditions and evaluation system as in Experiment 1. The results of input time analysis in Experiment 2 were identical to Experiment 1. The 2 studies suggest that the time for using text box was longer than for other interface conditions. The results indicate that the most appropriate input interface for use in mobile phones is the pull-down interface.
