Purpose Social media pose serious challenges to information evaluation, which can make
credibility evaluation more difficult compared to other information resources. As a result, this …

Online incivility and harassment in political communication have become an important topic
of concern among politicians, journalists, and academics. This study provides a descriptive …

Affective polarization is pervasive in modern US politics, and can be intensified by strategic
messaging from members of Congress. But there are gaps in our knowledge of the …

How accurate are survey-based measures of social media use, in particular about political
topics? We answer this question by linking original survey data collected during the US …

I conduct an experiment which examines the impact of moral suasion on partisans engaged
in uncivil arguments. Partisans often respond in vitriolic ways to politicians they disagree …

Democratic societies depend on citizens being informed about candidates and
representatives, to allow for optimal voting and political accountability. As the Fourth Estate …

Not all aspects of a campaign are issue-oriented, nor are many voters. A candidate builds
mass support largely by appearing warm, friendly, and likable, not only by propagating their …

Sentiment analysis is a widespread technique for computing the emotional loading of text to
determine if it is “positive”,“negative” or “neutral”. Sentiment analysis has received broad …

This thesis investigates whether, and if so, how digital trace data taken from the social media
platform Twitter can be used as a valid and reliable basis for measuring public opinion …

This dissertation analyzes the causes and moderators of three online political behaviors:
racist harassment, partisan incivilty, and the consumption of partisan" clickbait" news. The …