Kepuasan hidup merupakan salah satu variabel penting yang dapat memengaruhi banyak faktor dalam tahapan perkembangan remaja. Salah satu faktor yang dapat memengaruhi kepuasan hidup adalah hubungan dengan saudara kandung. Hubungan saudara kandung dianggap krusial dalam tahap perkembangan remaja meskipun masih terabaikan dalam penelitian dan praktik psikologis. Penelitian ini bertujuan untuk mengetahui hubungan antara siblings relationship (affection, hostility dan rivalry) dengan kepuasan hidup remaja awal. Peneliti juga ingin melihat hubungan antara data demografis yang terkait dengan siblings relationship yaitu birth order dan jarak usia. Responden penelitian terdiri dari 102 remaja awal berusia 10-15 tahun. Alat ukur yang digunakan adalah Siblings Relationship Inventory dan Satisfaction with Life Scale adapted for Children. Hasil analisis regresi sederhana menunjukkan bahwa terdapat hubungan signifikan yang positif antara dimensi affection dan hostility dengan kepuasan hidup remaja awal namun tidak terdapat hubungan pada dimensi rivalry. Peneliti menemukan birth order hanya memiliki hubungan dengan dimensi rivalry dan tidak ada hubungan dengan dimensi affection dan hostility. Peneliti tidak menemukan hubungan antara jarak usia dengan seluruh dimensi siblings relationship.

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Life satisfaction is one of the important variables that can influence many factors in the stages of adolescent development. One of the factors that can affect life satisfaction is the relationship with siblings. Sibling relationships are considered crucial in the developmental stage of adolescence although they are still neglected in psychological research and practice. This study aims to determine the relationship between siblings relationship (affection, hostility and rivalry) and life satisfaction in early adolescents. Researchers also want to see the relationship between demographic data related to siblings relationships (birth order and age gap). Respondents consisted of 102 early adolescents aged 10-15 years. The measuring instruments used are Siblings Relationship Inventory and Satisfaction with Life Scale adapted for Children. The result of simple regression analysis shows that there is a significant positive relationship between the dimensions of affection and hostility with life satisfaction in early adolescents, but there is no relationship in the dimension of rivalry. Researcher found that birth order only had a relationship with siblings rivalry and no relation with siblings hostility and rivalry. Researcher did not find any relationship between age gap and every dimension in siblings relationship.