隨著網際網路的快速成長，全球資訊網已成為資訊交換的新平台。Web的出現雖然提供給網路使用者豐富的資訊來源，但另一方面卻也引發了如資訊負荷提高與位址迷惘的問題。針對上述情況，目前研究多以技術觀點來探討，著重於如何提供網站使用者瀏覽或搜尋工具的支援，對於使用者網站資訊獲取行為的相關分析卻依然缺乏。依據認知適合理論（Cognitive Fit Theory)與任務-科技適配理論（Task-Technology Fit Theory)之說明，唯有當科技能夠支援任務、或科技能與使用者的特質適配時，才會出現良好的績效表現。亦即唯有透過分析影響網站使用者資訊獲取行為之變數，才能確切瞭解所需要支援的項目，並針對該項目發展出合宜的工具或系統，如此才可使得系統的功能更加適配使用者任務的進行，並進而降低任務執行成本與提升執行的績效。
鑑於上述原因，本研究以任務科技適配理論為基礎來探討網站使用者的資訊獲取模式，透過實證資料的蒐集與統計假說的驗證分析，我們發現高任務模糊度的情況會顯著提升使用者採取掃描策略的程度，而在低任務模糊度低不確定性的情形時，使用者採行正式搜尋策略的程度會顯著的提升。此外，使用者的滿意度會受到正式搜尋與目的瀏覽策略的影響，而使用者的目的瀏覽以及掃描策略的運用則會提升對目標物件的瞭解程度。本研究的成果可以協助網站經營者、企業資訊系統的開發人員、與元件開發工程師瞭解使用者在Web環境下的資訊獲取模式，並進而在不同的情況下建構使用者相對應的科技支援，以提升任務的執行效率。

The rapid growth of World Wide Web has created a new platform for information exchange. Although WWW makes more data easily available, it has also created many problems such as information overload, disorientation, and reduced quality of data. In order to solve these problems, most current approaches primarily focused on information filtering and searching based on the technical perspective. Few researches have provided analytical results of the information acquisition behaviors over the Web. Based on the cognitive fit theory and task-technology fit (TTF) theory, this study proposes a comprehensive research model to describe the individual information acquisition strategies on the World Wide Web.
To examine the research model, a laboratory experiment was performed on a group of 120 students. Sixteen task scenarios were designed and one prototype website was developed according to the specifications defined through the literature review and a pilot study. The research results show that both task structure and system characteristics have an impact upon individual information acquisition behaviors over the website. The experiment also confirms that subjects feel more satisfactions at adopting formal search and purposeful browsing strategies. The understanding effect of the research object is a function of scanning and purposeful browsing strategies. The interaction between task structure and system characteristics is also significant. These findings allow us to have a better understanding of information acquisitions behavior on the Web.

第一章 緒論
第一節 研究背景與動機 1
第二節 研究目的 3
第三節 研究流程 4
第四節 論文結構 6

第二章 文獻探討
第一節 資訊獲取策略 7
第二節 影響資訊獲取策略的因素 17
第三節 本章總結 20

第三章 研究模式
第一節 任務-科技適配理論 22
第二節 研究模式 26
第三節 研究假說 35
第四節 本章總結 39

第四章 研究設計
第一節 研究方法選擇 41
第二節 變數的衡量 42
第三節 研究設計 47
第四節 研究前測 50
第五節 本章總結 55

第五章 研究結果分析
第一節 實驗流程 56
第二節 正式實驗問卷信效度檢驗 57
第三節 受測者基本資料分析 62
第四節 研究假說驗證 67
第五節 研究結果彙整 77

第六章 結論
第一節 結論與貢獻 81
第二節 研究限制與未來研究建議 84

參考文獻 85

附錄
附錄一 前測問卷 97
附錄二 實驗任務內容說明 99
附錄三 涉入量表 105
附錄四 正式實驗問卷 107

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