This study was motivated by the sociocultural challenges faced by Papuan students in adapting to a university environment with different cultural, linguistic, and social backgrounds. These conditions may affect students' social adaptation and self-confidence during their academic journey. This study aimed to analyze the influence of peer social support on the social adaptation and self-confidence of Papuan students at UIN Sunan Kudus. The research employed a quantitative approach using a survey method. The study population consisted of 16 active Papuan students from the 2022 and 2023 cohorts. A saturated sampling technique was applied, in which the entire population was used as the sample. Data were collected through a Likert-scale questionnaire that had met validity and reliability requirements and were analyzed using Pearson correlation and simple linear regression with IBM SPSS Statistics 27. The results showed that peer social support had a positive relationship but no significant effect on social adaptation (p = 0.127; R² = 0.158). In contrast, peer social support had a positive and significant effect on self-confidence (p = 0.003; R² = 0.490). These findings indicate that peer social support plays a greater role in strengthening students' psychological aspects than in enhancing their social adaptation. The results of this study may serve as a basis for developing mentoring services and strengthening social support systems within higher education institutions.
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