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URN etd-0614117-221117 Statistics This thesis had been viewed 310 times. Download 0 times. Author Chi-Yuan Hu Author's Email Address email@example.com Department Graduate Institute of Design Science Year 2016 Semester 2 Degree Ph.D. Type of Document Doctoral Dissertation Language zh-TW.Big5 Chinese Page Count 129 Title ＡUSABILITY STUDY OF USING COMPOUND HAND GESTURES FOR ROTATING 3D IMAGES ON MOBILE DEVICES Keyword Compound Hand Gestures Middle-Aged Mobile Devices 3D Immersive Heritage 3D Immersive Heritage Mobile Devices Middle-Aged Compound Hand Gestures Abstract Following the advancement in computing and user interface technologies of mobile devices, controlling 3D virtual artifacts on small screens using comprehensive touch gestures is a development trend of digital and mobile learning. However, few studies have discussed the difference between different age groups in operating the interface of mobile devices.
This research discusses the influence of middle-aged and elderly people using comprehensive touch gestures to rotate 3D content on small screens. It takes middle-aged and elderly and general people as the subject, comparing the difference of the interaction with 3D content on 5-inch and 7-inch screens with 3 groups of gestures controlling three axial directions of XYZ. The experiment observes 60 adult subjects' (30 young participants of ages 18–25 years and 30 middle-aged participants of ages 45–55 years), operation characteristics and task completion time, especially those middle-aged and elderly ones who have qualified vision after correction and nimble fingers, using gestures to repeat three tasks of rotating 3D simulated heritage models twice (5-inch and 7-inch), so as to measure through subjective assessment and gestures change frequency. The results after two-way ANOVA and independent sample T-test are as follows: In the two tasks of large object rotation and rotation of a small object with notable features, the two groups exhibited significant differences in operation performance. In the task of rotating a small object without notable features, the two groups showed nonsignificant differences. Thus, the experimental results indicated that when the rotation task was simple, the participants’ performance was affected by their age and mental models. According to behavior observation, it is found that conventional touch gestures and two-hand operation complete the tasks faster, while single finger touch and new gestures do it slower. During the rotation task of 3D virtual artifacts, the middle-aged group were less confident and easily frustrated because they were experiencing a gradual deterioration in their physiological functions attributable to their age and lacked experience in using new technology products. Regarding the screen size, the advantage of a large screen was compromised. In comparison, rotating objects on the small screen is affected by the control-display ratio factor, and the small operating range and short distances yielded more favorable performance. However, the content was easily blocked on small screens. In the technical aspects, the middle-aged group easily misinterpreted the axial orientation of objects without notable features and were likely to make mistakes because of undue gestures. The participants in the middle-aged group improved their performance after flagging is incorporated into the experiment. According to the behavioral observations and analysis, the young group had more experiences in using new technology products and exhibited adroit comprehensive touch gestures, whereas the middle-aged group habitually used one finger to perform the rotation task; thus, the free rotating gyroscope controlling design became a burden for the middle-aged group. These results suggest that middle-aged people need to learn how to use new technologies before they can practically use them. Therefore, when developing new products, designers should consider the deteriorating physiological functions, use behavior, and needs of middle-aged people. Therefore the achievements in the research can be the important reference basis for designers of considering middle-aged and elderly groups.
Advisor Committee Li-Chieh Chen - advisor
Chien-Hsiung Chen - co-chair
Chun-Ching Chen - co-chair
Ping-Lin Fan - co-chair
Yen Hsu - co-chair
Yung-Chin Tsao - co-chair
Files Date of Defense 2017-05-05 Date of Submission 2017-06-14