本研究針對國小學童對於電腦指向設備之操作使用性進行研究，研究過程包含四個階段：(1)利用使用性工程，探討學童操作不同操作特性之指向設備時所產生的操作需求，(2)建立各需求因子間的評價因子與相關性架構，(3)針對學童操作需求因子進行設計開發，並建立功能模型，(4)比較功能模型與現有指向設備間之操作績效，包含(a)點選績效、(b)繪圖績效、(c)腕部角度量測、(d)主觀滿意度。目標在於發展新一代針對學童人因操作需求所設計之專用指向設備，以確保學童在指向設備操作上的人因安全性。
經由前測可發現學童對於指向設備之(1)方向控制、動作控制、移動速度、點選準確性及減少動作干預，佔有總需求之52.65%；其次加上(2)移動靈活、容易學、不要鼠尾與配合學童成熟度則可滿足近8成的需求(78.96%)。以ISM分析各因子間之關聯性，可以得到學童操作需求的設計入口於[ (a)消除鼠尾連接線、(b)併置移動控制方式與鼠鍵、(c)縮小體積、(d)加快移動速度]。經概念設計，並開發新式指向設備之功能模型，新設備包含了(1)非限定操作、(2)多指聯合操作、(3)併置移動控制與鼠鍵等三大概念，達成滿足學童操作性的需求，最終測試實績以腕部距自然置放位置之0.4度之水平撓偏角、4.0度之背屈角展現新設備之人因優異性，並獲得0.966秒之平均點選績效及優於傳統指向設備12.5%的繪圖穩定性。

The research focuses on the usability of schoolchildren on computers’ pointing devices. The process of research includes four different stages: (1) investigate the different demands of school children when using pointing devices with different characteristics through using the usability engineering, (2) set up the evaluation factors and structure of correlations between different demands, (3) design and develop a process model aimed at the demands of the schoolchildren, and (4) compare the efficiency of the process model with the existing pointing devices, these comparison includes, (a) clicking performance, (b) drawing performance, (c) measurements on the angle of the wrists, and (d) subjective satisfactory. The goal of this research is to create a new pointing device that meets the ergonomic demands of the schoolchildren and make sure the safety of these operations.
By the testing before design, we find out that 52.65% of the overall demands of schoolchildren on pointing devices fall on the control of directions, the control of movements, the speed of moving, accuracy on clicking, and the keystroke should not intervene the moving. With the demands of the elastic moving, easy learning, get rid of the wires and the maturity of the schoolchildren’s physiological function, these demands have already reached for 78.96% of the overall demands. By using Interpretive Structural Modeling to analyze the correlations between the factors, we found out that the new design for the schoolchildren should come with the following characteristics: (a) no wires attached to the mouse pointer, (b) combination of the keystrokes and ways for moving, (c) shrinking in size, and (d) fast moving. Through the design and the development of the process model on new pointing device, the new device includes, (1) unlimited operation, (2) joint operations of many fingers, and (3) combination of the keystrokes and ways for moving. These three conceptions meet the demands of the schoolchildren. At last, the testing performance shows the results of outstanding ergonomic design of the new pointing device. The wrists only form a horizontal radial deviation of 0.4° and 4.0° of wrist extension compared with the natural position. In addition, the clicking performance is at the average of 0.966 second. Furthermore, the stability of drawing is 12.5% better than traditional pointing devices.

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