The Kappa values for the inter-operator reliability of were 0.97 and 0.89. The high Kappa values (Operator 1: 0.92, 0.90 Operator 2: 0.91, 0.88), high intra-class correlation coefficients (varied from 0.93 to 1.00), and low typical errors (varied from 0.01 to 0.34) between the first and second data collection represented a high level of intra-operator reliability. The Aiken’s V averaged at 0.84 ± 0.03 and 0.85 ± 0.03 for the validation of indicators. Four well-trained operators divided into two groups that independently analyzed a match of Spanish La Liga. Twenty professional football coaches voluntarily participated in the validation of match variables used in the System. The aim of the present study was to investigate the validity of match variables and the reliability of Champdas Master System used by trained operators in live association football match.
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