A Simple Survey (Novel)

A number of students at a university sign up for a strange activity. They're a motley group: some are here because they're short on credits, others have gotten into trouble and need it to be overlooked. A professor walks in and explains that the activity is nothing more than a simple survey: he'll show them a series of 24 short films, and the students have to rank them in order of preference. The only condition is that none of the films can have the same rank.