Reliability of a computerised system for recording location on a tennis court
Abstract:The purpose of the current investigation was to evaluate the reliability of the SIMI Scout software (SIMI Reality Motion Systems GmbH, Munich, Germany) as it is configured to be used in elite tennis research. The system allows the location of events to be entered on a video overlay where a fixed camera view is used or entered onto a birds-eye view of the playing area. Three experiments were conducted using the video overlay only, the birds-eye view only and a combination of the two. There was a 100% agreement between the observers for the player hitting a stroke, the type of stroke, the outcome of the stroke and the end of the rally in all three experiments (k = 1.00). The use of the video overlay only proved the most reliable for shot entry (mean location error of 53.8cm) followed by the use of the birds-eye view only (mean location error of 67.6cm) and the use of both methods (mean location error of 96.1cm). Therefore, researchers wishing to use the system with television footage where camera angles change will need to be well trained and demonstrate an acceptable level of reliability based on the analytical goals of the given study.
Document Type: Research Article
Publication date: November 1, 2008