隨著智慧型手機的普及，智慧型手機上的應用程式－App已經成為熱門的議題。　在Android平台中，App為了使用者各式各樣的功能必須各種取得權限；然而，App也有可能要求為了提供功能外的權限，使用者必須先同意App的權限要求才能下載App。　本研究旨在了解權限對於使用者採用App的影響，提出了權限-功能適配度的概念，並以科技接受模型為基礎結合認知隱私風險及社會交換理論來做深入的探討。
本研究結果包含：　(1) 使用者對於App的態度會正向影響其下載意圖。 (2) 使用者對App的認知有用性及App得到的評分會正向影響使用者對於App的態度；認知隱私風險會負向影響使用者對於App的態度；當App要求的權限超過它所提供的功能時，使用者對於App的態度會較為負面。　其中以認知有用性的影響最大 (3) App要求權限的隱私程度會正向影響使用者認知的隱私風險；App要求的權限超過它提供的功能時，使用者會認知更多隱私風險。

Because of the expanding of smartphones, the applications on smartphones, Apps, are widely discussed. In Android platform, Apps have to acquire permissions in order to provide various functions for users. However, Apps might request more permissions than they need. Users have to grant permissions requested by Apps before downloading Apps. The purpose of this study is understanding the impacts of permissions on users' intention to download mobile Apps. We proposed the concept of "permission-function fit (PFF)", and included perceived privacy risk and social exchange theory into TAM to explore the research purpose.
The results of this study are: (1) users' attitude toward the App positively influences their download intention. (2) Users' perceived usefulness and the ranking of the App positively influence users' attitude toward the App; perceived privacy risk negatively affect users' attitude; when App requests more permissions than it needs, users have negative attitude toward it. Perceived usefulness has the strongest effect on attitude. (3)The privacy level of permissions positively affects users' perception of privacy risk; when Apps request more permissions than they need, users perceive higher privacy risk.

論文審定書 i
中文摘要 ii
Abstract iii
Table of Content iv
List of Figures vi
List of Tables vii
Chapter 1 Introduction 1
1.1 Research Background 1
1.2 Motivation 3
1.3 Research Purpose 6
Chapter 2 Literature Review 8
2.1 Technology Acceptance Model (TAM) 8
2.2 Perceived Risk 10
2.3 Download Process of Different App Stores 13
2.4 Privacy Level of Permissions and Privacy Concern 17
2.5 Permission-Function Fit (PFF) and Social Exchange Theory (SET) 20
2.6 Ranking and Electronic Word-of-Mouth (eWOM) 21
Chapter 3 Research Model and Hypotheses 24
3.1 Research Model 24
3.2 Hypotheses 27
3.2.1 Perceived Usefulness, Attitude and Download Intention 27
3.2.2 Perceived Privacy Risk and Attitude 28
3.2.3 Privacy Level of Permissions and Perceived Privacy Risk 30
3.2.4 Permission-Function Fit, Perceive Privacy Risk and Attitude 31
3.2.5 Ranking and Attitude 33
3.3 Operational Definitions 34
Chapter 4 Research Methodology 36
4.1 Experiment Design 36
4.2 Scenario Design 37
4.3 Experiment System and Experiment Process 45
4.3.1 Experiment System 45
4.3.2 Experiment Process 45
4.4 Questionnaire Design 47
4.5 Pilot Test and Pretest 49
4.6 Incentives 49
4.7 Data Collection 51
Chapter 5 Data Analysis 52
5.1 Demographic Statistics 52
5.2 Reliability and Validity 55
5.3 Analysis Results 59
5.3.1 Relationships among Privacy Level of Requested Permissions, Permission-Function Fit and Perceived Privacy Risk 60
5.3.2 Relationships among Permission-Function Fit, Ranking and Attitude 62
5.4 Mediator 63
5.4.1 Perceived Privacy Risk 65
5.4.2 Attitude as a Mediator 66
5.5 Discussion 68
5.5.1 Analysis Results 68
5.5.2 Discussion of PFF 69
5.6 Theoretial Implication 73
5.6.1 Practical Implication 74
Chapter 6 Conclusions 76
6.1 Summary 76
6.2 Limitations 77
6.3 Future Research 78
Reference 79
Appendix 85

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