USUDC is held in a format based on the
World Universities Debating Championship. The tournament is held in April, before most American colleges hold their final exams. In recent years about 180 teams have competed at the tournament. After six or eight preliminary rounds there is a "break," announced at the banquet on the second day, where the top thirty-two teams progress to the third day. On day three, rounds are elimination rounds, where the bottom two teams in a round do not progress. Rounds progress through octofinals, then quarterfinals, semifinals, and finals, where the National Champion is named. Seeding for octofinals is based on the cumulative points the team had at the end of preliminary rounds. Novices teams consisting of students in their first year of collegiate debate have a separate break to novice quarterfinals or semifinals should they not make the open octofinals. A subsequent novice final then crowns the Novice Champion.
Scoring system In contrast with most major BP tournaments such as WUDC, USUDC is notable in that since 2020 it has used a tapered scoring system for preliminary rounds, awarding different multiples of the "3, 2, 1, 0" point scheme depending on the round. For instance, in early preliminary rounds first place receives six points, second place receives four points, third place receives two points, and fourth place receives none, whereas in later rounds, first receives three points, second, two, third, one, and fourth, zero. This system seeks to remedy an inherent flaw in the standard BP points and matchup system, formally analyzed in a 2020 paper by Barnes et. al: The problem of sorting teams based on skill in order to generate a fair break is compared by the authors to the
Brazil nut effect, where the largest nuts in a package of mixed nuts rise to the top of the container during transport because of shaking. Laboratory experiments have shown that shaking equally vigorously throughout the process is less effective than gradually decreasing the vigorousness over time, because applying as much force at a nearly-sorted state as was applied initially disrupts the more sorted state. The analysis by Barnes et al. shows that this phenomenon is analogous to standard BP scoring and that many variations of tapered scoring systems—where the amount of points awarded decreases with each preliminary round—significantly outperform the standard of equal points across rounds in producing skill-accurate breaks. ==US Universities Debate Association==