Investigation of Tilt Gesture Interaction to Manipulate Text Property in Mobile Device

Abstract

The objective of this study is to design and evaluate tilt gesture interaction to manipulate text property in mobile device through experiment. The function of changing the font size is added to the mobile phone information input, it can change the font size of the sent text to enhance the emotional effect of the message. The experiment evaluated performance and usability of four methods prototypes, including three new interactive methods (Shake, Leaning, and Accel) and a traditional button method. The experiment explored whether the new interaction method is comparable to the traditional button method by evaluating the workload and subjective usability of these methods. The results showed that in terms of task completion time, accuracy and subjective work, the Shake and Leaning methods can be equivalent to the button method. However, the Accel method is lower than other prototypes in these aspects. Subjective comments indicated that these new interactive methods are useful. After a period of practice and adaptation, these methods can replace traditional methods, add more functions to mobile phones and improve user efficiency. At the same time, participants expressed that changing the font size can help them express their emotions in the message to a certain extent. Even though the three new interactive methods are not superior to the button method in changing the font size of the message, these methods can still be added into the functions of mobile phone to provide users with convenience and higher practicability.