Penelitian ini dilakukan untuk melihat hubungan antara tanggung jawab dan peran defender (pembela korban) dalam bullying pada siswa SD. Pengukuran tanggung jawab menggunakan alat ukur yang dikonstruksi oleh Sukiat (1993) dan pengukuran peran defender menggunakan alat ukur peran defender yang dikonstruksi oleh peneliti berdasarkan hasil penelitian mengenai reaksi bystander oleh Rigby (2008), hasil penelitian mengenai alasan menjadi defender oleh Beane (2008), dan kriteria defender yang dikemukakan oleh Beane (2008). Partisipan berjumlah 135 siswa yang berasal dari dua sekolah dasar di kota Cilegon, dengan karakterisitik usia 10-12 tahun. Hasil penelitian ini menunjukkan terdapat hubungan positif yang signifikan antara tanggung jawab dan peran defender dalam bullying pada siswa SD sebesar 0,532 yang signifikan pada l.o.s. 0,01 (nilai p = 0,000). Artinya, semakin tinggi tanggung jawab yang dimiliki siswa, maka semakin tinggi tingkat peran defender yang dimiliki.

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This study was conducted to examine the relationship between responsibility and the role of defender in bullying incidence among elementary school students. The measurement of responsibility was conducted using measuring instruments constructed by Sukiat (1993). The measurement of the role of defender was conducted using measuring instrument constructed by the researcher based on bystander reaction study result by Rigby (2008); reasons being defender study result by Beane (2008); and defender criteria set out by Beane (2008). Total participants of this study was 135 students from two elementary schools in Cilegon with age characteristic of 10-12 years. The results of this study indicate that there is a significant positive relations between responsibility and the role of defender in bullying incidence among elementary school students with 0.532 which is significant at l.o.s. 0.01 (p value = 0.000). It means that the higher the responsibility held by the students, the higher their level of defending roles.