Student achievement in academic and nonacademic competitions is shaped not only by individual capability but also by external support, one form of which is reward. This study aims to examine the effect of reward on the achievement motivation of Airlangga University students participating in academic and nonacademic competitions. The study employed a quantitative associative approach with a purposive sampling technique. Data were collected through a five-point Likert-scale questionnaire administered to 86 students who had participated or were currently participating in academic and/or nonacademic competitions and were analyzed using simple linear regression. The results show that reward has a significant effect on achievement motivation (t = 3.323; p = 0.001), with R = 0.341 and R² = 0.116. Reward explains 11.6% of the variance in achievement motivation, while the remaining 88.4% is explained by factors outside the research model. These findings indicate that reward is one of the external factors associated with students’ achievement motivation in competitive settings. Abstrak Prestasi mahasiswa dalam kompetisi akademik dan nonakademik bukan semata hasil dari kapasitas individu, melainkan juga dipengaruhi oleh dukungan eksternal, salah satunya reward. Penelitian ini bertujuan mengkaji pengaruh reward terhadap motivasi berprestasi mahasiswa Universitas Airlangga dalam mengikuti kompetisi akademik dan nonakademik, menggunakan metode kuantitatif asosiatif dengan teknik purposive sampling. Data dikumpulkan melalui kuesioner berskala Likert lima poin dari 86 mahasiswa yang memiliki pengalaman mengikuti kompetisi akademik dan/atau nonakademik, lalu dianalisis dengan regresi linear sederhana. Hasil penelitian mengonfirmasi bahwa reward berpengaruh signifikan terhadap motivasi berprestasi (t = 3,323; p = 0,001), dengan nilai R sebesar 0,341 dan R² sebesar 0,116. Kontribusi reward terhadap variasi motivasi berprestasi tercatat sebesar 11,6%, sedangkan 88,4% sisanya dipengaruhi faktor lain di luar model penelitian. Temuan ini mengindikasikan bahwa reward merupakan salah satu faktor eksternal yang berperan dalam motivasi berprestasi mahasiswa saat berkompetisi.
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