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Percorrer por autor "Wong, P. Del"

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  • General network analysis of national soccer teams in FIFA World Cup 2014
    Publication . Manuel Clemente, Filipe; M. L. Martins, Fernando; Kalamaras, Dimitris; Wong, P. Del; Mendes, Rui
    This study analyzed the network characteristics of successful and unsuccessful national teams that participated in FIFA World Cup 2014. The relationship between the variables of overall team performance and the network characteristics measured on the basis of the passes between teammates was also investigated. A dataset of 37,864 passes between teammates in 64 soccer matches enabled the study on network structure and team performance of 32 national soccer teams. Our results showed significant differences in the dependent variables of network density (F4,123 = 2.72; p = 0.03; 𝜼𝒑 𝟐 = 0.04; small effect size) and total links (F4,123 = 2.73; p = 0.03; 𝜼𝒑 𝟐 = 0.04; small effect size) between the teams that reached the later stages of the tournament. Goals scored presented a small positive correlation with total links (r = 0.24; p = 0.001), network density (r = 0.24; p = 0.001), and clustering coefficient (r = 0.17; p ˃ 0.050). High levels of goals scored were associated with high levels of total links, network density, and clustering coefficient. This study showed that successful teams have a high level of network density, total links, and clustering coefficient. Thus, large values of connectivity between teammates are associated with better overall team performance.
    2015Artigo científico Acesso aberto Ver mais
  • Midfielder as the prominent participant in the building attack : a network analysis of national teams in FIFA World Cup 2014
    Publication . Manuel Clemente, Filipe; M. L. Martins, Fernando; Wong, P. Del; Kalamaras, Dimitris; Mendes, Rui
    This study aimed to analyze the most prominent players’ positions that contributed to the build of attack in football during FIFA World Cup 2014. The connections among teammates in all matches of the tournament were analyzed, and the tactical lineup and players’ positions of players were codified as independent variables. Four centrality network metrics were used to identify the pertinence of each players’ position. A total of 37,864 passes between teammates were recorded. Each national team was analyzed in terms of all their matches, thus all 64 matches from the FIFA World Cup 2014 tournament were analyzed and codified in this study. A total of 128 adjacency matrices and corresponding network graphs were generated and used to compute the centrality metrics. Results revealed that the players’ position (p = 0.001; η2p = 0.143; Power = 1.00; moderate effect size) showed significant main effects on centrality measures. The central midfielders possessed the main values in all centrality measures in the majority of analyzed tactical lineups. Therefore, this study showed that independent of the team strategy, the players’ position of a central midfielder significantly contributed to the build of attack in football, for example, greater cooperation and activity profile.
    2015Artigo científico Acesso aberto Ver mais