Psychometric properties of the Coach-Athlete Relationship Questionnaire (CART-Q) in a sample of Brazilian youth and adult athletes

This study examined the psychometric properties of the Coach–Athlete Relationship Questionnaire (CART-Q) in a sample of 1344 Brazilian youth and adult athletes. Participants completed the CART-Q and the Basic Needs Satisfaction in Sport Scale (BNSSS). Data analysis was conducted through Confirmatory Factor Analysis (CFA), Structural Equation Modeling (SEM), Cronbach's alpha, composite reliability, multigroup analysis, and Pearson's correlation ( p < .05). CFA confirmed a multidimensional structure containing the three dimensions of Closeness, Commitment, and Complementarity: χ² (37) = 264.10; χ²/df = 5.13; CFI = .96; TLI = .94; and RMSEA = .068. Internal consistency was satisfactory (>.70). SEM model showed an acceptable fit ( χ² (56) = 593.28; χ²/df = 2.71; CFI = .90; TLI = .90; RMSEA = .057), indicating that the three dimensions of the CART-Q predicted positively all basic needs satisfaction subscales (β range = .11 to .38). CART-Q was revealed to be invariant across gender, sport type, and age group. It was concluded that the CART-Q can satisfactorily be used in research studies involving Brazilian athletes regardless of their age group, gender, and sport.