Test-Retest Reliability and Criterion-Related Validity of Modified Agility Tests

This study investigates the test-retest reliability and criterion-related validity of three modified agility tests—Illinois, Weave, and Right Boomerang Run—adapted for inline roller sports among 30 female athletes aged 6–10 years from Bathinda, Punjab, India. Using a quantitative repeated-measures correlational design, the tests were administered on a skating-specific surface with standardized protocols. Test-retest reliability was assessed using intraclass correlation coefficients (ICCs), and criterion-related validity was evaluated by comparing test scores with standardized versions using Pearson’s correlation coefficient. Results revealed high reliability for the Modified Illinois (ICC = 0.948, p < 0.05), Weave (ICC = 0.830, p < 0.01), and Right Boomerang Run (ICC = 0.805, p < 0.01) tests. Criterion-related validity was also strong, with correlations of 0.983, 0.904, and 0.970 (p < 0.01) for the respective tests. These findings confirm the adapted tests as reliable and valid tools for assessing agility in young inline roller sports athletes, offering practical implications for talent identification, training design, and performance monitoring.