Followers of scientists on Twitter

What types of followers do scientists have on twitter? We classified twitter followers of each of the four authors of this paper (link below) into major scholarly and non-scholarly categories. ‘Science students’ includes undergraduates, graduate students and postdocs. ‘Other scientists’ are science professionals who could not be classified into a more specific category. ‘Science organizations’ comprise universities, conferences, professional organizations and online science associations. The ‘unknown’ category is for users who did not provide information on their profile that allowed them to be classified into another group. Bars indicate mean values with standard deviation.