Construct Validity and Test-Retest Reliability of the Test of Advanced Movement Skills with a Dual-Outcome Scoring System

The objective was to verify the construct validity and test-retest reliability of the Test of Advanced Movement Skills (TAMS) with an innovative dual-outcome scoring system. Three statistical approaches - confirmatory factor analysis (CFA), exploratory structural equation modeling (ESEM), and item response theory analysis (IRT) - were applied to the data collected from 88 participants aged 9-12 years. Furthermore, 10 of them were randomly selected to examine the test-retest reliability by calculating intraclass correlation coefficients (ICC). The synthesis of findings from CFA, ESEM, and IRT analyses provides supportive evidence that two- and bi-factor structures demonstrated better model-data fit compared to the one-factor structure. An excellent level of test-retest reliability was confirmed in the TAMS (ICC = .96) and anthropometric instruments (ICC = .986-.998). We conclude that a composite score derived from the TAMS is sufficient and practical to measure one's general competence in advanced movement skills during late childhood.