Research topics. The most frequently researched topic across the disciplines, with the exception of marketing, was “social media usage and attitudes towards social media” (67.7%). In general, articles covering this topic either examined how and why people use social media or evaluated users’ perceptions or attitudes toward social media. Other popular topics included “social media as either mass or personal communication tools” (22.2%) and “social (i.e., race, gender, etc.) or political (i.e., political candidates, campaigns, etc.) issues regarding social media” (17.9%) (see Table2).