本研究旨在探討2005年大選期間，選民對於大眾傳播媒介的注意程度，是否會影響政治效能感、政治信任感與選舉活動參與，進而影響選民的投票行為。研究發現，屬於「綠、獨」族群的民眾在政治話題、選舉報導上對媒體注意程度愈高，則對政府效能與對政府的信任愈高，同時其對選舉活動的參與次數愈多，進而影響其投票行為，愈傾向投票給執政黨候選人。屬於「藍、統」族群的民眾，對選舉新聞、評論注意程度愈高，民眾對政府效能與政府信任感愈低，與「綠、獨」族群相反。「藍、統」族群的政治媒介對投票行為沒有直接影響，即使透過中介變項對投票行為的間接效果亦不顯著。本研究結論，無論「藍、統」或「綠、獨」族群，民眾對選舉新聞或話題注意程度愈高，則參與選舉活動的次數愈高；民眾的政治效能感愈高，其政治信任感亦愈高；而且，在其他變項控制之下，政治信任感對投票行為存在顯著影響。

Using survey data collected by Taiwan’s Election and Democratization Study Project of 2005, this paper applies structural equation modeling to test relationships between political media, political efficacy, political trust, political participation and voting behavior. For instance, the more exposure to political media DPP supporters have, the more likely they are to possess higher levels of political efficacy and political trust, as well as being more active in participation during county magistrate and mayoral elections. On the contrary, the more exposure to political media KMT supporters have, the more likely they are to have lower levels of political efficacy and political trust. The political media behavior of this same focus group of voters does not significantly affect their voting behavior, even via political efficacy and political trust.