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  <title>HUBUNGAN ANTARA SIBLING RIVALRY DENGAN PERILAKU ASERTIF PADA SANTRI REMAJA  DI SMAS X SUKOHARJO</title>
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  <namePart>SETIA DYAH AJI KHOIRUNNISA</namePart>
  <role>
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  <namePart>Ayatullah Kutub Hardew</namePart>
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   <dateIssued>2025</dateIssued>
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  <languageTerm type="text">Bahasa Indonesia</languageTerm>
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 <note>ABSTRAK &#13;
Setia Dyah Aji Khoirunnisa, 181141095, Hubungan Sibling Rivalry dengan &#13;
Perilaku Asertif pada Santri Remaja di SMAS X Sukoharjo, Psikologi Islam, &#13;
Fakultas Ushuluddin dan Dakwah, Universitas Islam Negeri Raden Mas Said &#13;
Surakarta,2025. &#13;
Remaja masa kini berada dalam tantangan perkembangan yang kompleks, di mana &#13;
pencarian jati diri, pengaruh teman sebaya, tekanan sosial, dan tuntutan keluarga &#13;
seringkali menimbulkan kebingungan dalam mengekspresikan diri. Banyak remaja &#13;
menunjukkan kesulitan dalam berkomunikasi secara terbuka, cenderung pasif, dan &#13;
takut menyampaikan pendapat karena khawatir dikritik atau tidak diterima. Salah &#13;
satu faktor yang turut memengaruhi rendahnya perilaku asertif pada remaja adalah &#13;
pengalaman sibling rivalry, yaitu persaingan antar saudara kandung dalam &#13;
mendapatkan perhatian orang tua, yang dapat membentuk interaksi sosial dan pola &#13;
komunikasi yang cenderung pasif. Penelitian ini bertujuan untuk menguji hubungan &#13;
antara Sibling Rivalry dan perilaku asertif pada santri remaja di SMAS X &#13;
Sukoharjo. &#13;
Penelitian ini menggunakan pendekatan kuantitatif dengan metode korelasional. &#13;
Subjek dalam penelitian ini adalah 60 santri remaja di SMAS X Sukoharjo, yang &#13;
dipilih menggunakan teknik purposive random sampling. Instrumen yang &#13;
digunakan meliputi skala sibling rivalry (α = 0,685) dan skala perilaku asertif (α = &#13;
0,800), dengan validitas dan reliabilitas di uji menggunakan skala Likert. Uji &#13;
hipotesis dilakukan dengan analisi korelasi Pearson Product Moment &#13;
menggunakan SPSS Statistics versi 27.0. &#13;
Hasil penelitian menunjukkan adanya hubungan negatif yang signifikan antara &#13;
sibling rivalry dengan perilaku asertif dengan koefisien korelasi sebesar -0,760 dan &#13;
nilai signifikansi 0,001. Temuan ini menunjukkan bahwa Ho ditolak dan Ha &#13;
diterima. Arah hubungan negatif ini mengindikasi bahwa semakin tinggi sibling &#13;
rivalry yang dialami, maka semakin rendah kemampuan perilaku asertif remaja. &#13;
Sibling rivalry memberikan pengaruh besar 57,7% terhadap perilaku asertif. &#13;
Implikasi dari temuan ini menunjukkan bahwa perilaku asertif remaja santri dapat &#13;
ditingkatkan melalui upaya penguatan hubungan antar saudara serta pengembangan &#13;
keterampilan sosial secara berkelanjutan.  &#13;
Kata Kunci: sibling rivalry, perilaku asertif, remaja  &#13;
vii &#13;
ABSTRACT &#13;
Many teenagers, particularly those living in boarding school environments, often &#13;
face difficulties in expressing themselves confidently and openly. Challenges such &#13;
as fear of criticism, lack of self-confidence, and pressure to conform can lead to &#13;
passive communication patterns. One contributing factor to this issue is sibling &#13;
rivalry—competition among siblings for parental attention—which may shape a &#13;
teenager’s emotional development and reduce their ability to behave assertively in &#13;
social situations. This study aims to examine the relationship between sibling &#13;
rivalry and assertive behavior among teenage students at SMAS X Sukoharjo. &#13;
This study employed a quantitative approach with a correlational method. The &#13;
subjects were 60 teenage students at SMAS X Sukoharjo, selected using purposive &#13;
random sampling. The instruments used were the sibling rivalry scale (α = 0.685) &#13;
and the assertive behavior scale (α = 0.800), both tested for validity and reliability &#13;
using the Likert scale. The hypothesis was tested using Pearson Product Moment &#13;
correlation analysis with SPSS Statistics version 27.0. &#13;
The results showed a significant negative relationship between sibling rivalry and &#13;
assertive behavior (r = -0.760, p = 0.001). The higher the level of sibling rivalry &#13;
experienced, the lower the teenagers’ assertive behavior, and vice versa. These &#13;
findings support the proposed hypothesis, where Ha is accepted and Ho is rejected. &#13;
Sibling rivalry contributed 57.7% to assertive behavior. The implication of these &#13;
findings suggests that teenagers' assertive behavior, particularly among students in &#13;
Islamic boarding schools, can be improved through efforts to strengthen sibling &#13;
relationships and to develop social skills in a sustainable manner. &#13;
Keywords: sibling rivalry, assertive behavior, teenagers</note>
 <note type="statement of responsibility">SETIA DYAH AJI KHOIRUNNISA</note>
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