Evidence of reliability and construct validity of a motor coordination test with ball (MCTB) for adolescents aged 13 to 15

Abstract

Objective: The study aimed to present evidence of reliability and construct validity of the Motor Coordination Test with Ball (MCTB) for adolescents aged 13 to 15 years. Methodology: The sample consisted of 402 students, stratified equally into both sexes and age groups. Results: The reliability results of the study, carried out using the intraclass correlation coefficient, showed “excellent” reliability in the intra - and inter-rater measurements (≥0.999 (0.999; 1.000) and ICC ≥0.982 (0.961; 0.991), respectively). Regarding the results of construct validity, the exploratory factor analysis showed good fit and adjustment indexes of the final two-dimensional model (BTS= 0.001; KMO= 0.81; factor loading 0.51 to 0.91; communality 0.25 to 0.86; explained variance of 65%; GFI=0.99; AGFI= 0.99; RMSR= 0.02). Confirmation of the model, carried out through confirmatory factor analysis, with X2 = 60.2 significant for p<0.001 and indices of absolute goodness of fit (GFI = 0.99, RMSEA = 0.08), incremental fit (NFI = 0.97, TLI = 0.96, AGFI = 0.99), and parsimonious fit (CFI 0.98), showed adequate adjustment for the tested model. Regarding the individual classification values of the tasks, it was observed, that males presented a higher percentage of correct classification of the original cases (86.6%) and validation crossed (84.1%) compared to females (85.6% and 82.1%, respectively). Conclusions: Paying attention to the indices of the reliability and construct validity, it is possible to qualify the MCTB as a valid and reliable instrument for evaluating Motor Coordination with a ball, for Brazilian adolescents aged 13 to 15 years of both sexes.