Latar belakang: Identifikasi dan deteksi dini gangguan komunikasi pada bayi dan anak membutuhkan alat uji penapisan sahih, andal, mudah diaplikasikan oleh orangtua/ pengasuh. Instrumen CSBS DP ITC adalah alat skrining yang sahih dan andal mendeteksi gangguan komunikasi anak, namun belum diterjemahkan dan diuji kesahihan dan keandalan dalam bahasa Indonesia.Tujuan: Mengetahui kesahihan dan keandalan CSBS DP ITC bahasa Indonesia sebagai alat uji penapisan gangguan komunikasi anak 6-24 bulan.Metode: Penelitian potong lintang di Poliklinik TKPS/ RS Cipto Mangukusumo Jakarta (Februari-Mei 2019) dua tahapan. Tahapan pertama kesahihan interna 2 periode yaitu pertama, adaptasi transkultural kuesioner CSBS DP ITC bahasa asli ke bahasa Indonesia dan kedua, pengujian kuesioner CSBS DP ITC versi bahasa Indonesia kepada 35 orangtua/ pengasuh. Uji kesahihan dianalisis menggunakan Spearman Correlation, uji keandalan dianalisis menggunakan Alpha Cronbach s coefficient. Tahapan kedua kesahihan eksterna, uji diagnostik CSBS DP ITC dibandingkan BSID III skala bahasa sebagai baku emas kepada 147 orangtua/ pengasuh dan 147 anak.Hasil: Kesahihan interna CSBS DP ITC bahasa Indonesia umumnya baik dengan nilai r > 0,3. Keandalan CSBS DP ITC bahasa Indonesia baik dengan Alpha Cronbach s (0,876-0,896). Kesahihan eksterna CSBS DP ITC bahasa Indonesia mendapatkan sensitifitas 71,43% dan spesifisitas 81,48%.Simpulan: Kuesioner CSBS DP ITC bahasa Indonesia terbukti sahih dan andal sebagai alat uji penapisan gangguan komunikasi anak usia 6-24 bulan

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Background: Early identification and detection of communication disorders in children require valid and reliable screening tool that easily to apply. The CSBS DP ITC is a valid and reliable screening tool to detect communication disorder in children, but it has not translated and tested for validity and reliability in Indonesian language.

Objective To find out validity and reliability of CSBS DP ITC Indonesian version as a screening tool for communication disorders in children aged 6-24 months.

Methods: Cross-sectional study was carried out in clinic of Growth Development- Social Pediatric / Cipto Mangukusumo Hospital Jakarta (February - May 2019) in two stages. First stage was internal validity consisting 2 periods, transcultural adaptation from original language to Indonesian and second stage was final Indonesian CSBS DP ITC questionnaire was tested to 35 parents / caregivers. Validity analyzed using Spearman Correlation. Reliability analyzed using Alpha Cronbach s coefficient. Second stage was external validity by compared CSBS DP ITC with BSID III language scale as gold standard to 147 parents / caregivers and 147 children.

Results: Internal validity showed good validity with r > 0.3. Reliability showed good with Alpha Cronbach (0.876-0,896). External validity has 71.43% sensitivity and 81.48% specificity.

Conclusion: Indonesian CSBS DP ITC questionnaire valid and reliable as screening test for communication disorders in children aged 6-24 months.