臺灣受制於本身氣候、地形條件與氣候變遷等因素，總雨量雖豐沛，然降雨分配不平均及河川短小湍急等造成缺水的困境，而南部地區夏季尤其嚴重。本研究使用保護動機理論，先了解民眾對缺水訊息的態度，並預期民眾會在認知中介過程（Cognitive Mediating Processes）受缺水訊息的影響，經過威脅評估和因應評估後產生保護動機，意即是否使用家庭回收水以免除或降低缺水的威脅。資料蒐集方面，採用問卷調查法，並以李克特五點量表進行設計。問卷第一部份依據保護動機的構面編排題項，第二部份蒐集受訪者的性別、年齡、教育程度、居住類型、接收缺水訊息的經驗、平常使用家庭回收水的經驗等數據資料。問卷調查之對象為高雄市居民，調查時間為2019年5月，問卷發放地點為臺灣自來水公司高雄服務所，總計回收有效問卷232份。
研究結果發現，缺水資訊對於引發民眾的認知中介過程皆有顯著正向影響，而認知中介過程中，嚴重性與受創性對民眾使用家庭回收水動機無顯著影響，反而自我效能、反應效能、因應成本對民眾使用家庭回收水動機有相當顯著的影響。人們感知到威脅事件的嚴重性時（嚴重性），以及感知到威脅事件會對個人或社會造成的影響時（受創性），這兩者皆不會引發對於使用家庭回收水之保護動機；當人們自我評估自己有能力去對威脅事件做出回應（自我效能），以及人們意識到做出回應能夠減輕威脅事件所帶來的的影響時（反應效能），這兩者皆會引發對於使用家庭回收水之保護動機；做出回應所需付出或損失的成本（因應成本）越高，使用家庭回收水之保護動機則越低。本研究根據此結果推導出結論，探討出影響民眾使用家庭回收水之因素，提出需加強宣導水資源訊息給民眾、或是降低回收水使用成本等相關建議，以及後續研究可以改善之地方。

Although the rainfall is plentiful all the year around in Taiwan, the water shortage situation is still obvious due to the special local climate, topographic conditions and global climate change including uneven distribution of rainfall in every month and rushing rivers, especially in Taiwan’s southern region during summer. To begin with, the people’s attitude for water shortage information was explored by using Protection Motivation Theory and the influence of water shortage information in people’s cognitive mediating process was also confirmed in this study. Afterwards, the people’s protect motivation was induced after the threat appraisal and coping appraisal were completed which is meaning that usage of grey water could release or weaken the threat of water shortage.
In this study, the questionnaire survey research method was adopted and questionnaire survey was designed using the Likert five-point scale to collect the research data. The first part of questionnaire was organized on the facet of protection motivation. The second part collects of questionnaire was cataloged including the gender, age, education level, type of residence, experience of receiving water shortage information, and experience of using grey water. The finite population of survey was conducted in Kaohsiung citizens. The survey period was conducted in May 2019. The questionnaire distribution was at the Kaohsiung Service Office of the Taiwan Water Corporation. A total of 232 valid questionnaires were collected. In the research result, it indicated that the cognitive mediating process of protection motivation as water shortage is significantly positively influenced by the factor of water shortage information. In the research of cognitive mediating process, the influence of severity factor and vulnerability factor in water shortage for Kaohsiung citizen on the using motivation of grey water is not significant. However, the factors including self-efficacy, response-efficacy, and response cost significantly influence the using motivation of grey water. Even though people sense the severity of water shortage, defined as severity factor, and perceive the influences of water shortage threat event on individual and society, defined as vulnerability factor, people would not induce a protection motivation of using grey water. Besides, when people can make a sense of self-assessment to response the threat event of water shortage, defined as self-efficacy factor, people would induce a protection motivation of using grey water. Also, when people has made a sense to response the threat event of water shortage and decreases the influence in threat of water shortage, defined as response-efficacy factor, people would induce a protection motivation of using grey water. The higher the response and lost costs of using grey water is, the lower the protection motivation effect of using grey water is.
In final, based on the research results as described above, the critical factors of using grey water in household were derived. How to enhance the widely use of grey water were recommended in this research and continuous research of use of grey water in future was also supported.

論文審定書 i
謝誌 ii
摘要 iii
Abstract iv
第一章 緒論 1
第一節 研究背景 1
第二節 研究動機 3
第三節 研究目的與問題 6
第二章 文獻回顧 8
第一節 水資源缺乏 8
第二節 水資源回收再利用 9
第三節 影響民眾對回收水接受度之因素 11
第四節 訊息涉入 12
第五節 保護動機理論 14
第三章 研究方法 17
第一節 研究架構與假設 17
第二節 問卷設計與研究對象 21
第三節 統計分析方法 23
第四章 資料分析 25
第一節 敘述統計分析 25
第二節 信度效度分析 33
第三節 結構方程式分析 38
第五章 結論與建議 41
第一節 研究發現 41
第二節 相關建議 43
第三節 研究限制 44
參考文獻 45
附錄一 正式問卷 53

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