Objective.The Tuck Jump Assessment (TJA), a clinical plyometric assessment, identifies 10 jumping and landing technique flaws.\r\nThe study objective was to investigate TJA interrater and intrarater reliability with raters of different educational and clinical\r\nbackgrounds. Methods. 40 participants were video recorded performing the TJA using published protocol and instructions. Five\r\nraters of varied educational and clinical backgrounds scored the TJA. Each score of the 10 technique flaws was summed for the total\r\nTJA score. Approximately onemonth later, 3 raters scored the videos again. Intraclass correlation coefficients determined interrater\r\n(5 and 3 raters for first and second session, resp.) and intrarater (3 raters) reliability. Results. Interrater reliability with 5 raters was\r\npoor (ICC = 0.47; 95% confidence intervals (CI) 0.33ââ?¬â??0.62). Interrater reliability between 3 raters who completed 2 scoring sessions\r\nimproved from0.52 (95% CI 0.35ââ?¬â??0.68) for session one to 0.69 (95% CI 0.55ââ?¬â??0.81) for session two. Intrarater reliability was poor to\r\nmoderate, ranging from 0.44 (95% CI 0.22ââ?¬â??0.68) to 0.72 (95% CI 0.55ââ?¬â??0.84). Conclusion. Published protocol and training of raters\r\nwere insufficient to allow consistent TJA scoring. There may be a learned effect with the TJA since interrater reliability improved\r\nwith repetition. TJA instructions and training should be modified and enhanced before clinical implementation
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