Observations of the football game action: A generalizability study

In this study we observed several matches from different football teams pla ying the last Football World Cup. We selected a structure of crossed multif acet design which incorporates different matches between different teams by means of a set of integrated categories. This integrated categories were: 1) Starting of ball control or recovering of the ball control -8 categories -, 2) Maintaining of the ball control or development of the game action 18 categories-, 3) Losing the ball control or ending of the ball control -8 ca tegories-, 4) Categories of the target team when the opponent has the ball control -18 categories-, 5) Six categories when the ball is not in movement . To confirm the obtained results we redraw our data in a partially nested multifacet structure, analyzing the different categories that compose each integrated set of categories, independently; also the interaction between t hem was evaluated. The last strategy allows us to analyze, independently, d ifferent matches of different teams; also different crossed and nested comb inations were evaluated.