engleski

Performance Analysis in Volleyball: Problem of defining the set score

The purpose of this study is to present the relative point difference as the most adequate methodological variation of a score definition in a volleyball set. A sample of 40 volleyball sets played in the Men’s European Volleyball League in 2011 and 2012 were randomly selected. The predictor variables were efficiency coefficients of the five phases of volleyball game (serve, reception, spike, block and dig) while a criterion variable was the set score. The set score was defined in four different manners, victory - defeat, category according to the range of point difference, the point difference and the relative point difference. A series of four multiple linear regression analysis was conducted to determine the relationship between the efficiency coefficients of the game phases and the set score, each for differently defined set score. The relative point difference is a variation of the set score that has 75.2% of common variance with the game phases. Next is the point difference with 70.7%, then the category with 69.0%, and the victory – defeat with the lowest amount, only 47.5%. Relative point difference additionally differentiates the entities with the same point difference and different overall rallies played in a set. An inadequately defined set score could enable the determination of the phenomenon that actually exists.

volleyball ; performance analysis ; multiple linear regression ; set score

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