Reliability of Teams' Game-Related Statistics in Basketball: Number of Games Required and Minimal Detectable Change

Autor/inn/en	Pérez-Ferreirós, Alexandra; Kalén, Anton; Gómez, Miguel-Ángel; Rey, Ezequiel
Titel	Reliability of Teams' Game-Related Statistics in Basketball: Number of Games Required and Minimal Detectable Change
Quelle	In: Research Quarterly for Exercise and Sport, 90 (2019) 3, S.297-306 (10 Seiten) PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Pérez-Ferreirós, Alexandra) ORCID (Kalén, Anton) ORCID (Gómez, Miguel-Ángel) ORCID (Rey, Ezequiel)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0270-1367
DOI	10.1080/02701367.2019.1597243
Schlagwörter	Team Sports; Statistics; Reliability; Foreign Countries; Scoring; Sample Size; Statistical Analysis; Spain + Suchen Sie Ihr Suchwort? Mannschaftssport; Statistik; Reliabilität; Ausland; Bewertung; Statistische Analyse; Spanien
Abstract	In basketball, game-related statistics are the most common measure of performance. However, the literature assessing their reliability is scarce. Purpose: Analyze the number of games required to obtain a good relative and absolute reliability of teams' game-related statistics. Method: A total of 884 games from the 2015-2016 to 2017-2018 seasons of the Spanish men's professional league were analyzed using all games and clustered by scoring difference. Intra-class correlation coefficient (ICC) was calculated for each variable. The number of games required to detect a change and to achieve good relative reliability was calculated using minimal detectable change and Spearman-Brown prophecy formula respectively. Results: Using all games, the results showed that the minimal number of games required in each group was 30 to detect a medium change (d > 0.5), 187 for a small change (d > 0.2), and 100 for good relative reliability (ICC = 0.75). Using balanced and unbalanced games, the minimal number of games required in each group was respectively 31 and 30 to detect a medium change (d > 0.5), 190 and 188 for a small change (d > 0.2), and 191 and 121 for good relative reliability (ICC = 0.75). Conclusions: The sample needs to consist of at least 30 games in each group to detect a medium size change, and at least 190 games to detect a small size change. To be able to rank teams with good reliability, at least 100 games are required when including both balanced and unbalanced games. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01