Penelitian ini bertujuan mengetahui pengaruh terapi kelompok suportif terhadap kemampuan keluarga merawat anak tunagrahita di SLB-C Kabupaten Cianjur. Penelitian ini menggunakan desain quasi eksperimen dengan pendekatan pre post tes dengan grup kontrol. Responden penelitian adalah keluarga dengan anak tunagrahita, 60 keluarga anak tunagrahita, terdiri atas 30 keluarga kelompok intervensi dan 30 keluarga kelompok kontrol. Kemampuan keluarga merawat anak tunagrahita yang mendapatkan terapi kelompok suportif lebih tinggi dibandingkan dengan kelompok yang tidak mendapat terapi kelompok suportif. Kemampuan keluarga setelah di kontrol dengan faktor confounding didapatkan peningkatan mean namun tidak signifikan. Artinya peningkatan kemampuan keluarga disebabkan karena intervensi yang dilakukan bukan dari faktor confounding. Disarankan terapi kelompok suportif digunakan sebagai terapi kelompok dalam meningkatkan kemampuan keluarga dalam merawat anak tunagrahita.

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Thepurpode of their research use to identify the effects of group supportive therapy to wording the family ability to take the family in caring for children Tunagrahita in SLB-C Cianjur Regency. This research utilized quasi experimental design using pre and post test with control group.The respondents consist of family in caring for children tunagrahita,sixty families were divided inti 2 groups; 30 families as experimental group and 30 families as control group. The research result demonstrated that the the families who recewed supportive group therapy showed that higer ability as composed to families without supportive group therapy.The family ability after being controlled by counfounding factors showed the improvement of mean but not significant. This weart that the family ability was only effected by the intervention not by the counfounding factors. It was recommended the supportive group therapy would be utilited of group therapy in inproving family ability to case for the family with caring for children.