A study on control-response ratio of multi-touch interface – Using rotation and move operations on 22 inch touch screen as example
| Autor: | Kuan Hung Chen, 陳冠宏 |
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| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 This study focused on the effect of control-response ratio (C/R ratio) of multi-touch interface for different operating tasks. Multi-touch is defined as operating on the screen with two or more fingers, and it is a type of direct control with the screen as input device. After Apple iPhone was released in 2007, the multi-touch technology has been steadily developed, and has become one of the main input devices in consumer electronics. C/R ratio is a ratio of movements of the control and system response. For example of mouse sensitivity, low C/R ratio is high sensitivity, and high C/R ratio is low sensitivity. C/R ratio adjustment may affect the performance and satisfaction of operation, but there is no the best C/R ratio values with a common rule in the present. In this study, experiments of the five C/R ratios were conducted with the zoom, rotation and move tasks. Five point Likert scale was utilized to survey the subject's satisfaction. Data of the number of errors, the number of touch and time of operation are analyzed to know how C/R ratio affects the dependent variables. Subjective satisfaction with C/R ratio 1/1 has the best value, but in the usability analysis among C/R ratio 1/1, 1/2 and 2/1, there is no significant difference. With the different tasks to analyze C/R ratio, it is found that in the move task the best C/R ratio could be located between 1/1 and 1/2, and in the rotation task the difference among C/R ratio 2/1, 1/1 and 1/2 is not significant. It is possible that the best C/R ratio is among the three values. The results show that in operation on mid-size multi-touch screen proper, C/R ratio will be needed by the different tasks to improve performance. The C/R ratio of the zoom task cannot be adjusted because of the limitation of the prototyping software. Comparing the rotation tasks and move tasks with the C/R ratio 1/1, zoom tasks are equal to or less than them. Zoom tasks with all levels can be tested and compared in the future to understand the difference among the zoom task and other tasks. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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