Desenvolvimento, validação e aplicação da fórmula Golden Index para a análise individual dos futebolistas em fase ofensiva Identificação dos Golden Players do Club Atlético de Madrid 2016/2017

• Autor(a) principal: Tiago Alexandre Pontes Pereira
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: https://repositorio-aberto.up.pt/handle/10216/116337
• topic: Outras ciências sociais; Other social sciences

The objective of this study was twofold: i) first, to develop and validate a novel formula called Golden Index (GI) aimed to classify players' individual performance in the attacking sub-phases of play in football; ii) second, to apply the GI formula to Club Atlético de Madrid (ATM) in the 2016/2017 season, to identify the most important players in the attacking sub-phases of play. Twelve variables were selected regarding the tactical-technical actions of players performed in the attacking sequences of play, collected through the implementation of two techniques, namely: Notational Analysis and Social Network Analysis. The first article of this work reflects all the methodological procedures that were used to validate all the components of the GI formula, through the use of a questionnaire provided to 13 football experts. The questionnaire was validated with consensus (≥75%), and the weight of each variable was measured. For the correct normalization of each variable we have used the statistical technique of standardization. From the application of the GI formula to eight matches of ATM in the 2016/2017 season, we aimed to: identify and classify the Golden Players in the offensive phase of the game (article 1), and; to investigate the influence of the situational variable "quality of the opposition" in players' individual performance in the offensive phase of the game (article 2). The results indicated the player Koke, wide midfielder, as the most important player of the team, presenting high influence and centrality in the network of passes, and with a high number of assists. On the other hand, the results of the second article were able to confirm the conditioning effect exerted by the "quality of the opposition" on players' individual performance. In this regard, there were oscillations in the players' indexes, with Koke attaining the highest index when competing with high-level opponents. Antoine Griezmann, second striker, was considered the best player against middle- and low-level opponents exhibiting a high preponderance in scoring zones, reflected by the number of shots and goals achieved, also showing a greater participation in the attacking process of the team. Thus, the GI formula can be viewed as a valuable and useful tool for analysing players' individual performance in the attacking sub-phases of play in Football, incorporating quantitative and objective information, allowing to complement other subjective analyses. The GI formula has proved to be sensitive in identifying and classifying players with the highest level of participation in the offensive phase of the game, thus contributing to the success of a team, being able, considering its generic nature, to be applied in any context of the offensive phase of the game in football.