資訊科技的發展進步，提供公民更多參與公共事務的管道，許多相關平台亦提供了更多樣化的公共議題相關訊息。在行動化的世代，手機App更是一重要的參與平台，在App中的資訊如何使得公民對議題的觀點產生影響是本研究所欲了解之處。當公民於App上對公共議題的討論進行參與時，資訊內容是否引發回聲室效應以及沉默螺旋現象為探討公民參與行為的重要課題之一。
本研究在實驗中選用多元成家以及死刑存廢爭議做為實驗議題，依公共議題的報導立場分為支持的報導、反對的報導與平衡的報導，以及依多數群眾意見分為贊同者多、反對者多與沒意見者多，以探討報導立場與群眾意見如何影響公民對議題的態度。並加入了公民意見極化、害怕被孤立與政治效能做為調節變數進行探討。分析方法選用邏輯迴歸分析，結果顯示，公共議題的多數群眾意見是造成App內回聲室效應與沉默螺旋的重要因素，而公共議題的報導立場則對沉默螺旋現象的產生沒有顯著影響。而調節變數中，僅公民意見極化對回聲室效應具有顯著影響。

Recently, citizens have more channel to take part in public issues by using information technology. In those platform, existing diverse information about public issues. In mobile age, mobile application is an important platform of citizen participation. In this study, focusing on how information influencing citizens’ opinions of the public issues in App. Exploring the echo chamber effect and spiral of silence in App of citizen participation.
This study select marriage equality and abolition of the death penalty as the research target and explore the effect of reported position (positive, negative, balance) and majorities of citizen opinion (approval, opposition, no idea) to the echo chamber effect and spiral of silence. Opinion polarization, fear of isolation and political efficacy are the moderators in this study.
Using logistic regression for data analysis. The results show that majority of citizen opinion will result in echo chamber and spiral of silence, and opinion polarization will mediate the relationship between the majorities of citizen opinion to the echo chamber effect.

論文審定書 i
摘要 ii
Abstract iii
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 研究問題 5
第四節 研究流程 7
第二章 文獻探討 8
第一節 公民參與 8
第二節 資訊科技與公民參與 11
2.2.1 DemocracyOS 11
2.2.2 G0V零時政府 12
2.2.3 微笑小熊調查小棧 13
第三節 回聲室效應(Echo Chamber Effect) 13
第四節 沉默螺旋(Spiral of Silence) 14
第五節 個人特質 15
2.5.1 意見極化(Opinion Polarization) 15
2.5.2 害怕被孤立(Fear of Isolation) 16
2.5.3 政治效能(Political Efficacy) 17
第六節 倫理判斷(Ethical Judgments) 18
第七節 公共議題 19
2.7.1 多元成家 20
2.7.2 死刑存廢 20
第三章 研究方法 21
第一節 研究架構 21
第二節 研究假說 22
第三節 操作型定義 25
第四節 研究設計 26
3.4.1 研究對象 26
3.4.2 實驗及問卷設計 26
3.4.3 資料收集程序 33
第四章 資料分析 34
第一節 樣本基本資料分析 34
第二節 信度與效度 43
第三節 假說檢定 51
4.3.1 多元成家假說檢定 51
4.3.2 死刑存廢爭議假說檢定 59
第五章 結論與建議 66
第一節 研究結果與結論 66
第二節 研究貢獻 69
第三節 研究限制與未來展望 70
Reference 72
附錄 76

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