Anak usia prasekolah rentan mengalami perselisihan dengan saudara kandungnya. Pada masa prasekolah, anak juga sedang mengalami perkembangan emosional. Cara ibu mengatasi sibling rivalry dapat berdampak pada perkembangan emosional anak. Penelitian ini bertujuan untuk mengidentifikasi hubungan strategi ibu mengatasi sibling rivalry dengan perkembangan emosional anak usia prasekolah. Penelitian ini menggunakan desain penelitian cross-sectional dengan teknik cluster random sampling didapatkan sampel penelitian berjumlah 112 ibu dengan anak usia prasekolah di Kecamatan Beji Kota Depok. Penelitian ini menggunakan dua jenis kuesioner, yaitu How Do You Manage Children’s Conflict Questionnaire (HMCC) dan Ages and Stages Questionnaire: Social-Emotional-2 (ASQ:SE-2). Hasil penelitian ini menunjukkan adanya hubungan bermakna antara strategi ibu mengatasi sibling rivalry dengan perkembangan emosional anak usia prasekolah (p value = 0,001). Penelitian ini diharapkan dapat mengoptimalisasi peran orang tua dan institusi pendidikan dalam meningkatkan perkembangan emosional anak usia prasekolah, khususnya anak yang memiliki saudara kandung di keluarga.

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Preschool-age children are prone to disputes with their siblings. During the preschool period, children are also undergoing emotional development. How mothers cope with rivalry can have an impact on children's emotional development. This study aims to identify the relationship between mothers' strategies to overcome sibling rivalry and the emotional development of preschool-age children. This study used a cross-sectional research design with cluster random sampling technique to obtain a research sample of 112 mothers with preschool-age children in Beji District, Depok City. This study used two types of questionnaires, namely How Do You Manage Children's Conflict Questionnaire (HMCC) and Ages and Stages Questionnaire: Social-Emotional-2 (ASQ:SE-2). The results of this study showed a significant relationship between mothers' strategies to overcome sibling rivalry and the emotional development of preschool-age children (p value = 0.001). This study is expected to optimize the role of parents and educational institutions in improving the emotional development of preschool-age children, especially those who have siblings in the family.