“…Personalization and filter bubbles have attracted much attention in the last years in social science (e.g., [6][7][8][9]), computer science (e.g., [10,11]), information systems (e.g., [12]), and law (e.g., [13,14]) from technical, regulatory and societal viewpoints, and are also the subject of controversy (e.g., [15]). There is a large body of work emphasizing the importance of filter bubbles in opinion formation and social processes, and various approaches have been proposed how to make users aware of unbalanced content consumption (e.g., [4,5,16]) or how to avoid filter bubbles (e.g., [17]). However, the number of approaches proposed to managing filter bubbles is relatively small in comparison to the attention filter bubbles receive in terms of impact, and little design knowledge is known about how to make filter bubbles manageable for the user.…”