電視畫面上使用動態文字訊息的現象已很普遍，其中以新聞和購物頻道出現的頻率最多。那些流竄在畫面上的「即時動態訊息」伴隨著各種不同的速度、位置和呈現方式呈現。例如電視畫面之動態文字訊息以不同的速度、不同的位置與不同的字體同時呈現在畫面右方 (或左方) 與下方。這些多變之訊息顯示方式已漸漸形成，但都可能影響著使用者訊息讀取的理解力與視覺舒適度。鑑於新聞節目是大多數民眾每天接收國內外時事的主要資訊來源，為提供電視資訊設計之參考，本計劃以國內新聞節目作為研究對象。主要探討 (1)水平與垂直動態訊息之呈現方式組合與速度組合之動態訊息呈現對於觀看者之閱讀績效與視覺疲勞的影響 (2)垂直與水平雙行動態訊息之距離與速度因子對於讀取理解績效與視覺疲勞的影響。其研究結果將可完整地提供電視媒體動態資訊製作與相關研究之參考，以提升電視畫面上動態訊息之視覺呈現品質與使用者的訊息讀取績效。
Displaying dynamic information on television develops gradually recent years, especially on news and shopping channels. The instant dynamic information shows with various speeds, positions and display ways -- the dynamic information displays on the right of the screen (or on the left) and bottom of the screen in the meanwhile for examples. The various display ways may influence users’ reading comprehension and visual comfort. Therefore, identifying appropriate display of speeds, position and display way is important for information design. The news program is the general and main source for users to receive news around the local and the world, hence, this study takes news channels as the survey subject.
The aim of this study is to investigate (1) the performance of reading comprehension and visual comfort on crawling displays with various speeds and display combinations, (2) the performance of reading comprehension and visual comfort on two-line crawling displays with various speeds and display distances. The experimental results provide the design guidelines for information, and the evaluation criterions of information design.
