<![CDATA[Keterampilan pemecahan masalah merupakan kompetensi esensial dalam pembelajaran abad ke-21 yang selaras dengan Sustainable Development Goal 4 tentang pendidikan berkualitas dan dapat dilatihkan melalui soal Higher Order Thinking Skills (HOTS). Namun, hingga saat ini belum terdapat instrumen soal HOTS terstandar yang secara spesifik untuk mengukur keterampilan pemecahan masalah pada submateri transport membran. Penelitian ini bertujuan menghasilkan instrumen soal HOTS untuk mengukur keterampilan pemecahan masalah pada submateri transport membran. Penelitian ini merupakan Research & Development dengan model 4D dan dilaksanakan di SMA Negeri 2 Lamongan dengan subjek siswa kelas XI IPA. Teknik pengumpulan data meliputi studi kepustakaan, validasi ahli dan uji coba terbatas. Analisis data meliputi uji validitas, reliabilitas, tingkat kesukaran, daya beda serta analisis ketercapaian indikator pemecahan masalah berdasarkan IDEAL. Penelitian ini menghasilkan dua set instrumen soal HOTS untuk mengukur keterampilan pemecahan masalah siswa pada submateri transport membran. Kedua set instrumen yang dikembangkan dinyatakan valid secara teoritis dan mayoritas butir soal valid secara empiris, serta reliabilitas yang tinggi. Tingkat kesukaran didominasi kategori sedang dan daya beda baik hingga sangat baik. Analisis ketercapaian indikator keterampilan pemecahan masalah menunjukkan bahwa kemampuan siswa berada pada kategori cukup, dengan indikator identify problem sebagai capaian tertinggi dan anticipate outcomes & act sebagai capaian terendah. Berdasarkan hasil tersebut, instrumen soal HOTS yang dikembangkan dinyatakan layak digunakan untuk mengukur keterampilan pemecahan masalah siswa pada submateri transport membran sebagai upaya mendukung pencapaian pendidikan berkualitas. Kata Kunci: instrumen soal, HOTS, keterampilan pemecahan masalah, transport membran, pendidikan berkualitas. Abstract Problem-solving skills are an essential competency in 21st-century learning that aligns with Sustainable Development Goal 4 on quality education and can be developed through Higher Order Thinking Skills (HOTS) questions. However, to date, there has been no standardized HOTS question instrument specifically designed to measure problem-solving skills in the subtopic of membrane transport. This study aims to develop a HOTS question instrument to measure problem-solving skills in the sub-topic of membrane transport. This study is a Research & Development project using the 4D model and was conducted at SMA Negeri 2 Lamongan with 11th-grade science students as the subjects. Data collection techniques included a literature review, expert validation, and a pilot test. Data analysis included validity and reliability tests, difficulty level assessment, discriminative power, and an analysis of problem-solving indicator achievement based on the IDEAL framework. This study produced two sets of HOTS test instruments to measure students’ problem-solving skills in the membrane transport subtopic. Both sets of instruments developed were found to be theoretically valid, with the majority of test items empirically valid, and demonstrated high reliability. The difficulty level was predominantly in the moderate category, and the discriminative power ranged from good to very good. Analysis of the achievement of problem-solving skill indicators showed that students’ abilities fell into the adequate category, with the “identify problem” indicator as the highest achievement and “anticipate outcomes & act” as the lowest. Based on these results, the developed HOTS test instruments were deemed suitable for measuring students’ problem-solving skills in the membrane transport subtopic as an effort to support the achievement of quality education. Keywords: test instruments, HOTS, problem-solving skills, membrane transport, quality education.]]>
