Penelitian ini bertujuan mendapatkan alat ukur IADL Lawton Bahasa Indonesia yang sahih dan andal untuk menilai kemandirian lansia sehat dalam komunitas di Jakarta. Penerjemahan IADL Lawton ke dalam bahasa Indonesia menggunakan metode 10 langkah ISPOR yang dilanjutkan dengan uji kesahihan serta keandalan. Total subjek penelitian 83 (24 laki-laki dan 59 Perempuan). Berdasarkan hasil uji kesahihan konstruk didapatkan nilai r semua butir diatas nilai r tabel (r > 0.213) dan uji kesahihan kriteria didapatkan korelasi yang sangat kuat dengan hasil observasi (r=0.888 dan p<0.000). Hasil uji keandalan internal didapatkan nilai alpha cronbrach 0.735 untuk total skor IADL Lawton. Hasil uji test-retest dengan jarak waktu antar wawancara satu minggu didapatkan korelasi mendekati sempurna (r=0.951). Hasil uji inter-rater antara pewawancara rater pertama dan kedua didapatkan excellent agreement (ICC >0.9). Kesimpulan didapatkan IADL Lawton versi Bahasa Indonesia memiliki kesahihan dan keandalan yang baik. IADL Lawton yang sudah diterjemahkan dapat dipakai untuk menilai kemandirian lansia sehat dalam beraktifitas di komunitas.

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This research aims to develop a valid and reliable Indonesian version of the IADL Lawton tool to assess the independence of healthy elderly individuals in the community in Jakarta. The translation of IADL Lawton into Indonesian follows the 10-step ISPOR methodology, followed by validity and reliability testing. The total research subjects were 83 (24 males and 59 females). Based on the results of the construct validity test, all item values exceeded the table value (r > 0.213), and the criterion validity test showed a very strong correlation with observation results (r=0.888 and p<0.000). The internal reliability test yielded a Cronbach's alpha value of 0.735 for the total score. The test-retest results with a one-week interval between interviews showed a nearly perfect correlation (r=0.951). The inter-rater reliability test between the first and second interviewers resulted in excellent agreement (>0.9). The Indonesian version of IADL Lawton demonstrates good validity and reliability. The translated IADL Lawton can be effectively used to assess the independence of healthy elderly individuals in their activities within the community.