| Abstrakt: |
The aim of this work was to design and validate an instrument (TOPSTATS) to rate, classify and compare the performance of professional players based on the Wyscout data provider. Content validity through consultation with three experts showed considerable agreement using Fleiss' kappa index (k = .691). Extracting data on players' play in the 2019-2020 season in La Liga and the English Premier League, criterion validity was calculated by relating the total player scores obtained in TOPSTATS to those in SofaScore. Pearson's correlation showed a significant association in all playing positions (r = 0.3-0.88, p < .05). The same procedure was used to ensure construct validity, relating the players' total scores to their market value. In this case, Pearson's correlation showed a significant association in 17 of the 24 playing positions (r = 0.36-0.80; p < .05). It was concluded that TOPSTATS showed optimal validity values. It is an instrument capable of comparing the football competence shown by players in their play during the same competition, according to their playing position. To this end, the tool allows for the agile and semi-automatic calculation of an overall performance index obtained from the interaction and weighting of variables containing data provided by Wyscout, which, being a subscription platform, has coverage in more than 200 competitions. [ABSTRACT FROM AUTHOR] |
