Introduction: Self-determination theory (SDT) posits the importance of three basic psychological needs (i.e., relatedness, autonomy, and competence) in promoting achievement. However, some cross-cultural researchers have cast doubt on the generalizability of the theory to non-Western cultures. The primary aim of the study was to test whether provision of support for relatedness, autonomy, and competence would be associated with achievement across both Western and Eastern cultures. Method: We drew on a subsample of students from the Program for International Student Assessment (PISA) (n = 92,325 students from
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