Data Quality Control of an Observational Tool to Analyze Football Semiotricity/Evaluación de una herramienta observacional del código praxémico del fútbol/Avaliação de um instrumento observacional código praxémico futebol

The "secret code" of the football was found out by a recent study. However, in this research, methodological aspects have not been reported; such as observation protocol or the procedure used to control the data quality. These deficiencies compromise the reliability of the results, so we have decided to analyze the reliability of the observational tool used in this study following the basic principles of this method. After a detailed study of the tool used in this study, an instrument based on a mixed system of field formats and E/ME category systems. After training of observers, data were taken to estimate coe6cients and association agreement (frequencies and percentages of agreement, correlation coe6cients, Kappa indices Cohen) inter and intraobserver, and after that, make a generalizability analysis. Results are satisfactory, and allow us to say that the tool is reliable to analyze football's semiotricity.