Classification of playing position in elite junior Australian football using technical skill indicators

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

  • Carl T. Woods
  • James Veale
  • Job Fransen
  • Sam Robertson
  • Neil Collier

​In team sport, classifying playing position based on a players’ expressed skill sets can provide a guide to talent identification by enabling the recognition of performance attributes relative to playing position. Here, elite junior Australian football players were a priori classified into 1 of 4 common playing positions; forward, midfield, defence, and ruck. Three analysis approaches were used to assess the extent to which 12 in-game skill performance indicators could classify playing position. These were a linear discriminant analysis (LDA), random forest, and a PART decision list. The LDA produced classification accuracy of 56.8%, with class errors ranging from 19.6% (midfielders) to 75.0% (ruck). The random forest model performed at a slightly worse level (51.62%), with class errors ranging from 27.8% (midfielders) to 100% (ruck). The decision list revealed 6 rules capable of classifying playing position at accuracy of 70.1%, with class errors ranging from 14.4% (midfielders) to 100% (ruck). Although the PART decision list produced the greatest relative classification accuracy, the technical skill indicators reported were generally unable to accurately classify players according to their position using the 3 analysis approaches. This player homogeneity may complicate recruitment by constraining talent recruiter’s ability to objectively recognise distinctive positional attributes.

Original languageEnglish
JournalJournal of Sports Sciences
Volume36
Issue number1
Pages (from-to)97 - 103
Number of pages7
ISSN0264-0414
DOIs
Publication statusPublished - 02.01.2018

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