Figure 4. Changes in student attitudes about clickers during the semester in the interactive S'04 course. Near the beginning (open bars) and near the end (solid bars) of the course, students were given an ICQ asking them to rate the usefulness of the personal response system for their learning in class, on a Leichert scale of 1 (not at all useful; don't like), to 5 (very useful; like very much). Reasons for why some students persisted in their dislike of the clickers are discussed in the text.