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  • 學位論文

應用彈道式移動模型探討高齡者與年輕人使用觸控螢幕時手移動控制能力的差異

An Application of Ballistic Movement Models to Compare the Elderly’s and Youngers’ Hand-Control Capabilities while Using a Touch Screen

指導教授 : 江行全

摘要


應用彈道式移動模型探討高齡者與年輕人使用觸控螢幕時手移動控制能力的差異 研究生:石馨文 指導教授: 江行全 博士 林瑞豐 博士 元智大學工業工程與管理學系 摘要 由於現在資訊化社會的演進,人們使用電子產品的頻率相當頻繁,為了提供廠商在設計觸控螢幕相關技術與產品時有使用者的操作能力依據,並同時增進高齡者在使用電子資訊產品的可用性與滿意程度,本研究首先驗證彈道式移動時間模型和彈道式移動變異模型在量測使用觸控螢幕時的手部控制能力,並在模型驗證後,以模型來描述高齡者和年輕人在使用觸控螢幕時手部控制能力的差異。 研究分成兩個階段,第一階段實驗的自變數為3個不同移動角度的目標點和5種不同的移動距離,應變數為執行彈道式移動所花費的時間與螢幕上水平及垂直方向的落點誤差。而第二階段實驗的自變數為一水平線上的3個不同目標點和5種不同的移動距離,應變數和第一階段相同。 第一階段實驗結果顯示:(1)移動時間會隨著移動距離的增長而增加,但會因不同的移動角度而有所差異,而高齡者所花費的移動時間比年輕人長(2)移動的落點誤差(水平及垂直)會隨著移動距離增加而增加,而高齡者的落點誤差比年輕人大。以第二階段的實驗數據對兩個彈道式移動模型作驗證的結果發現:(1)兩個模型對於整體的受測者資料變異有好的描述能力,彈道式移動時間模型描述89.1%的資料變異,而彈道式移動變異模型描述水平落點變異與垂直落點變異分別97.2%與87.9%的資料變異,(2)然而,兩個模型並不完全適用於描述個別受測者的資料變異,在使用彈道式移動時間模型上,12名受測者中有2位的資料變異不適合以模型進行描述,而在使用彈道式移動變異模型時,對於水平落點變異與垂直落點變異,12名受測者中皆有半數受測者的資料變異不適合以彈道式移動變異模型作描述。 本研究驗證彈道式移動時間模型與彈道式移動變異模型在描述受測者使用觸控螢幕時手控制能力的適用性,而兩個模型也適用於分析高齡者與年輕人的能力差異。然而,彈道式移動變異模型無法對個別受測者的資料變異作有效描述的原因有可能是因為:本研究的目標位置相較於受測者的身體是固定不變的,受測者在不斷執行移動後能以動覺回饋(kinesthetic feedback)記住目標點位置,如此一來移動距離不再對於移動落點變異有太大的影響。未來的研究方向可量測更多的受測者以增加實驗結果的應用性。 關鍵詞:彈道式移動、高齡者與年輕人比較、手部移動、觸控螢幕、準確度、移動時間

並列摘要


An application of ballistic movement models to compare the elderly’s and youngers’ hand-control capabilities while using a touch screen Student: Shin-Wen Shih Advisors: Dr. Bernard C. Jiang & Dr. Jui-Feng Lin Department of Industrial Engineering and Management Abstract Follow the evolution of informationization society recently, people have high-frequency to contact with electronic products. In order to supply the factory owner have peoples’ operation capabilities to stand on and use the basis to design in touch screen and to increase the electronic products usability and user satisfaction while the elderly using, this study first validated the applications of the ballistic movement time model and the ballistic movement variability model for measuring the hand-movement capabilities while using a touch screen. After model verifications, the two models were utilized to describe the differences between the elderly and the young while using a touch screen. This study was consisted of two experiments. In the first experiment, the independent variables were three different movement angles of targets and five different movement distances, and the dependent variables were the movement time and the movement variability measured horizontally and vertically on the touch screen. In the second experiment, the independent variables were three different locations of targets arranged in a horizontal line and five different movement distances, and the dependent variables were as same as those measured in the first experiment. The results of the first experiment showed that (1) the movement time increased with the increased movement distance, and it was significantly affected by different movement angle. Further, the elderly need more movement time than the young. (2) the movement endpoint variability (both the horizontal error and vertical error) increased with the increased movement distance. Also, the elderly committed larger magnitude of endpoint variability than the young did. The model verification results in the second experiment showed that (1) both the models predicted well the measured data variances. According to overall participants’ data, the ballistic movement time model predicted 89.1% data variance; the ballistic movement variability model predicted horizontal error and vertical error 97.2% and 87.9% data variance, respectively. (2) However, individual participants’ data could not well predicted by these two models. Two out of 12 participants’ movement time data could not be well predicted by the ballistic movement time model. And half out of 12 participants’ movement endpoint variability data (both the horizontal error and vertical error) could not be well predicted by the ballistic movement variability model. This study verified the applications of the ballistic movement time model and the ballistic variability model while using a touchscreen. And these two models can be utilized to analyze the differences of movement control capacities between the elderly and the young. The reason why the ballistic movement variability model cannot effectively describe individuals’ data might be due to kinesthetic feedback. Since movement targets shown on the touch screen were consistent to participants’ bodies, after repetitive movement executions, participants might remember the position of these targets, diminishing the effects of movement distance. In the further, we can measure more participates to increase the application of experiment results. Key word: ballistic movement, aging, hand-control movement, touch screen, accuracy, movement time

參考文獻


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