DESIGN, VALIDATION, AND RELIABILITY OF AN OBSERVATION INSTRUMENT FOR TECHNICAL AND TACTICAL ACTIONS IN INDOOR VOLLEYBALL

The purpose of this paper was to design, validate, and test the reliability of an observation instrument to analyse technical and tactical actions in indoor volleyball. The instrument collects information regarding: a) match context, b) game situations, c) technical actions of the serve, reception, set, attack, block, and court defence in relation to the player that intervenes, role, manner of execution, execution zone, and efficacy, and d) result of the play, and way the point was obtained. Instrument design and validation was done in seven stages: a) review of literature and consultation of experts; b) pilot observation and data analysis; c) expert qualitative and quantitative review of instrument; d) observer training test; e) expert review of instrument to establish content validity; f) measurement of the predictive ability of the instrument regarding the set's result; and g) measurement of the differences between practice and competition situations. The results show that the instrument allows for obtaining objective, valid, and reliable information about the players and

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