Degree of difficulty
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Degree of difficulty (DD, sometimes called tariff or grade) is a concept used in several sports and other competitions to indicate the technical difficulty of a skill, performance, or course, often as a factor in scoring. Sports which incorporate a measure of degree of difficulty include bouldering, cross-country skiing, diving, equestrianism, figure skating, freestyle skiing, gymnastics, rhythmic gymnastics, surfing, synchronized swimming and trampoline. Degree of difficulty is typically an objective measure, in sports whose scoring may also rely on subjective judgments of performance.
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The International Swimming Federation computes the degree of difficulty of dives according to a five-part formula, incorporating height, number of somersaults and twists, positioning, approach, and entry.
The International Federation of Gymnastics gives difficulty points for number of somersaults, number of body twists and the body position in somersaults (piked or straight). The total for a routine is the sum of the individual elements:
- Each 1/4 rotation of a somersault = 0.1 DD
- Completed 360° somersault (bonus) = 0.1 DD
- Each 1/2 twist = 0.1 DD
- Single somersaults without twist in pike/straight position = 0.1 DD
- Somersaults over 720° in pike/straight position = 0.2 DD
- "Degree of difficulty". Collins English Dictionary – Complete & Unabridged 2012 Digital Edition. Retrieved 2016-08-15.
- "FINA Degree of Difficulty / Formula and Components". USAdiver.com. Retrieved 15 August 2016.
- "Definition: Degree Of Difficulty". Gymnastics Zone. December 12, 2010. Retrieved 15 August 2016.
- "FIG Code of Points 2013‐2016 ‐ Trampoline Gymnastics ‐ Part I (TRA)" (PDF). FIG. Retrieved 3 October 2016.