LAUSR

Objective: Grounded in self‐determination theory, the present study examined the cultural invariance of a model that hypothesized sport performers' well‐being will be predicted by both their perceptions of motivation and the quality of the relationship held with their coach. Method: Participants (N = 756), originating from five countries (British, Chinese, Greek, Spanish, and Swedish), completed a questionnaire that measured perceived coach‐athlete relationship quality, basic psychological need satisfaction, self‐determined motivation, and well‐being. Structural equation modeling (SEM) was employed to analyze the data. Results: Analysis revealed that athletes who perceived a high quality relationship experienced heightened levels of basic need satisfaction. Need satisfaction positively predicted self‐determined motivation, which, in turn, linked to enhanced well‐being. Moreover, mediation analyses supported the explanatory roles of need satisfaction and self‐determined motivation within the model. Lastly, multi‐sample SEM invariance testing revealed the model to be largely invariant across cultures. Conclusions: The results support the universal application of self‐determination theory and the central role interpersonal relationships play in promoting well‐being. HIGHLIGHTSCoach‐athlete relationships hold motivational properties regardless of culture.Relationships are situations within which psychological needs are satisfied, and self‐determination and athlete potential are realised.The motivational processes as outlined by SDT can be universally applied and understood.