Increase knowledge retention: In the same University of Wisconsin study, 74 percent of the faculty respondents agreed or strongly agreed with the claim "Clickers have been beneficial to my students' learning," with the remaining 26 percent choosing a "neutral" response.
Track individual responses: The "clickers" that audience members use to send their responses to the receiver (and thus to the presenter's computer) are often registered to a particular user, with some kind of identifying number.