個人結構知識是區辨閱聽人讀取電子報介面效能的重要因素之一。結構知識較豐富的閱聽人，使用總覽目錄選取電子報內容的時間和正確性較高。反之，結構知識程度較低者，瀏覽時間較多、正確性較低。但是如果設計者能夠利用總覽目錄作為先導組體理論，讓閱聽人透過總覽目錄，而增進他們對電子報內容結構的認識。那麼，原先結構知識程度較低的閱聽人，或許可以減少他們的閱讀時間，或提高檢索正確度。 本研究使用實驗法，企圖證明上述假設。研究人員模擬一份電子報，設計兩種不同介面：具有總覽功能的下拉式選單目錄，以及不具總覽功能的階層式目錄。研究人員透過電腦紀錄與紙面問卷蒐集103位受試者的使用時間和答題內容，並進行統計分析。 研究結果發現，總覽目錄設計有助於減少「瀏覽頁數」的數量，使用者藉由總覽目錄設計，能有效減少其瀏覽電子報時的點選次數。但是在資料正確程度和態度方面則未發現顯著差異。 / Designing effective and efficient user interface is one of the most important issues for the designers of electronic newspapers. Audience with better structural knowledge may use news index more effective and efficient than those with poorer structural knowledge. With this thread, news index with multiple-layer, pull-down menu bars may serve as "advance organizer." Therefore, this study hypothesized that the audience with poorer structural knowledge may improve their performance in using news index by taking advantage of "advance organizer." An experiment was performed to test the hypothesis. The 103 college students were directed to "read" the a web-based electronic newspaper. Two set of stimuli were used: pull-down news indexes and non pull-down ones. Data were collected through computer logs and survey questionale. The result indicated that subject indexes design to serve as "advance organizer" may reduce the time audience spent. However, the subjects no significant difference in terms of the accuracy.