This meta-analytic study reviews empirical research published from 2007 to 2013 with an aim of providing robust conclusions about the relationship between social media use and citizen engagement. It includes 22 studies that used self-reported measures of social media use and participation, with a total of 116 relationships/effects. The results suggest that social media use generally has a positive relationship with engagement and its three sub-categories, that is, social capital, civic engagement, and political participation. More specifically, we find small-to-medium size positive relationships between expressive, informational, and relational uses of social media and the above indicators of citizen engagement. For identity- and entertainment-oriented uses of social media, our analyses find little evidence supporting their relationship with citizen engagement.

One of the democratic promises of social media relies on the expectation that citizens will be exposed to more diverse sources of information and will consequently be more likely to encounter views that challenge their beliefs and opinions. Still, recent evidence suggests that although social media may increase exposure to difference, citizen also take active steps to reduce the dissonance they encounter by engaging in selective avoidance tactics such as political unfriending and unfollowing. We report the findings from the first comparative study of political unfriending conducted in Asia, which analyzes survey data from two Chinese societies, Hong Kong and Taiwan. We find that political interest, political discussion network size, and political discussion with distant others all predict the likelihood of engaging in selective avoidance on social media. The results also suggest that political interest is a stronger predictor of unfriending in Hong Kong, while social and psychological factors play a more important role in Taiwan.

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This study reviews and analyzes the published empirical research on the role of social media in promoting political expression and participation in Confucian Asia, including China, Hong Kong, Singapore, South Korea, and Taiwan. In addition to providing a narrative review of the literature, our analyses show clear numerical estimates of the relationships among different types of social media use (i.e., informational, expressive, relational, and recreational), political expression, and participation in Confucian states. The findings reiterate the importance of the expressive use of social media, showing its moderately strong relationship with participation. The findings also show weak positive relationships with informational and relational uses. We also examine the role of political systems in these relationships and conclude that the strongest relationships are in democratic states, followed by hybrid and authoritarian systems.

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