D-14Q Free Communication/Poster Validity: Instrumentation and Equations
Power performance tests were used as control tests for development power program of soccer training. Since all performance tests included specific skills of motor tasks, it was necessary to examine validity of the tests using Multi Trait Multi Method (MTMM) model.
To confirm the factor structure of the power performance tests with MTMM model by structural equation modeling (SEM), and to examine the construct validity of the power performance tests.
Hundred and eighteen male soccer players, aged 20.0±0.9 years performed 15 performance tests in 4 sub-domains of power. Procedures of this study were; a) setting up the hypothetical structure of power based on the training phases, b) selection of the tests based on content validity, c) setting up the subjects, d) conducting the tests, e) examination of test-retest reliability of the tests, f) examination of construct validity with exploratory and confirmatory factor analyses (EFA and CFA), and MTMM models by SEM. Parameters of all models were estimated using maximum likelihood (ML) method.
High reliability coefficients were found for all performance tests. EFA, CFA and MTMM models of the tests were statistically valid. The goodness of fit indexes of MTMM model were better than those of EFA and CFA models; GFI=0.937, I=0.882, Chi-square=61.940) (P=.550), RMSEA=0.000 and so on. Convergence validity of MTMM model was low.
The performance tests for power development program in soccer satisfied construct validity by MTMM model.