振動數字顯示之視覺績效與疲勞影響

Visual Performance and Fatigue in Reading Vibrating Numeric Displays

謝堯宏(Y. H. Hsieh) ； 林久翔(C. J. Lin)

《中原學報》 33卷2期 (2005/06) Pp. 183-191

https://doi.org/10.6358/JCYU.200506.0183

摘要

一般的閱讀情境下，不論螢幕或人員，都有可能伴隨著或多或少的振動，而在短距離的閱讀作業中，標的物的振動會造成大量視覺績效的耗損，爲了精確監測視覺資訊。我們需要增加人類在振動環境下的設備之設計並建立更多明確的標凖值，以描述振動在閱讀任務下對視覺績效的影響。本研究以一實驗來探討振動環境下視覺終端顯示器呈現特性對使用者之視覺績效與視覺疲勞之相關影響。自變數爲不同振幅、振動頻率在各種VDT呈現內容（字體大小、字數多寡、振動方式）下，以反應時間，正確率、視覺疲勞閃光融合閾值(CFF)、視力值與主觀主題評量表來評估其對受測者之視覺績效與視覺疲勞之影響。研究的結果顯示本研究所採用振動頻率的五個水凖與振幅的四個水凖對於正確率會有極顯著影響。而字數多寡與字體大小及振動方式對受測者的反應時間、正確率、閃光融合閾值、視力變化及主觀評量亦明顯造成影響。綜合所有變數，本研究可以得到一個初始的結論，即以一般水平排列的數字呈現方式，在各種的振動情境下，字體大小越大，字數越少，對於VDT作業人員來說，可以到一個較爲穩定且快速的反應時間，且正確率亦可明顯獲得提升故能獲得較佳的視覺績效，並有效減少視覺疲勞。

關鍵字

視覺績效 ； 視覺疲勞 ； 振動 ； 頻率 ； 振幅

並列摘要

It is important at the design stage to make realistic predictions concerning the probable interaction of display characteristics on Visual Display Terminal (VDT) and the effects of vibration that are likely to be encountered in the reading task. An experiment was conducted in this study to investigate the effect of vibration environment and Visual Display Terminal (VDT) characteristics design on visual performance and visual fatigue. The design factors are the font size of numerics (6pt, 9pt,12pt), numbers (1, 2, 4), vibration amplitude (2pt, 4pt, 6pt, 8pt) vibration frequency (2.5Hz, 5Hz, 10Hz, 20Hz,30Hz) and direction of vibration (vertical, horizontal), Visual performance and visual fatigue were measured by reaction time, accuracy, critical fusion frequency (CFF), vision, and subjective measures. The results of the experiment were as follow; (1) The five levels of frequency (2.5Hz, 5Hz, 10Hz, 20Hz, 40Hz) had significant effects on the accuracy and visual fatigue. (2) The four levels of amplitudes (2pt, 4pt, 6 pt, 8pt) had significant effects on the visual performance and visual fatigue. (3) The vertical vibration had better visual performance than horizontal vibration. (4) The size of 12pt and one numeric had the best Performance on reading task.

並列關鍵字

visual performance ； visual fatigue ； font size ； numbers ； direction of vibration