| Summary: | 碩士 === 國立臺灣科技大學 === 工業管理系 === 95 === Followed the concepts of using natural postures in the operations of a finger-operated pointing input device (FPD) that was developed earlier in this laboratory, the study redesigned and verified the performance and muscle loading on the hand. Two experiments were conducted and nineteen subjects were recruited for the studies.
Fitts’ law tests were used for performance comparisons in the first experiment. Operational efficiencies were normalized according to the efficiency of using MICROSOFT mouse. The result showed that the pointing and dragging operational efficiency of FPD was 45.73% and 39.32% of that of the mouse, respectively. They were improvements when compared with that of the previously developed FPD.
Comparisons of muscle loading on hand, using Logitech TrackMan and FPD, while playing Microsoft computer game “solitaire,” was conduced in the second experiment. The result showed that the number of times that fatigue occurred at Abductor pollicis longus using FPD was 10%, and was 40% for Opponens pollicis 40%. When using Logitech TrackMan Whell, they were 60% and 70%, respectively. On the contrary, fatigue occurred at the Adductor pollicis for 70% of FPD users’ and there were 10% while using Logitech TrackMan Whell. Subjectively comparing showed that whole appraisal for FPD is of the same level as that of the Logitech TrackMan Whell.
We attributed manly to the unfamiliarity of the users for lower performance and higher loading on the hand while using FPD. Improvement of pointing feedback and increase exercise time were suggested for the improvement of task performance.
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