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Journal : Jurnal Inovasi Pendidikan dan Sains

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Rasch Model Analysis of Item Quality for Measuring Conceptual Understanding of the Human Body System Ngandoh, Satwika Trianti; Riandi, Riandi; Rahmat, Adi; Muslim, Muslim
Jurnal Inovasi Pendidikan dan Sains Vol 6 No 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Nahdlatul Wathan Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51673/jips.v6i1.2459

Abstract

This study aimed to eval_uate the quality of test items in a science learning assessment instrument designed to measure students' conceptual understanding of the human body system using Rasch model analysis. A quantitative descriptive research design was employed, involving 100 junior high school students as participants. These students completed a conceptual understanding test consisting of 35 multiple-choice items. The Rasch model was applied using Winsteps software to assess item fit, analyze the person-item distribution through the Wright Map, and eval_uate the overall validity and reliability of the instrument. The analysis results showed that all test items met the Rasch model criteria, indicating their suitability for assessing students' conceptual understanding. The instrument provided an item reliability score of 0.85, reflecting strong internal consistency, while the item separation index of 2.38 confirmed its capability to distinguish items based on difficulty levels. The Wright Map further illustrated a proper alignment between item difficulty and student ability, ensuring fair measurement across varying levels of proficiency. These findings confirmed that the developed instrument was valid and reliable, making it a valuable tool for both eval_uative and diagnostic purposes in science education
Co-Authors Abdillah , Rasyid Adolf Bastian afred suci, afred Agusta, Muhammad Adrian Ahmad, Nur Jahan Aldri Frinaldi Ali Azhar Amri, Muhammad Fahriza Anna Fitri Hindriana Anto Ariyanto, Anto Arif Sura, Sunarto Arif, Sunarto arizal N, arizal Ashidiq, Rizki Maulana Aznuriyandi, Aznuriyandi Bariroh, Ghurrotul Brata, Wasis Wuyung Wisnu Cita Tresnawati, Cita Damayanti, Anggia Fitri Dewi Susanti Dharma Satria, Hengky Didik Priyandoko Dr. Riandi Dr. Saefudin Dwika Listihana, Wita Dwika Lodia Putri Eka Cahya Prima Euis Erlin Fadillah*, Rofi Wafa Fatkhurahman Fiandini, Meli Gunawan, Eryk Gunawan, Syahreza Andika Hadibroto, Tiara Sri Annisa Hadiyati Hadiyati, Hadiyati Handayanie, Yunni Hanif, Norfazrin Mohd Hartini, Venty Sugih Heri, Helwen Indrawan, Fery Jannah, Novi Dewi Khadikatul jeki Jeni Wardi Jumarno Juniarti, Mia Angrianan Karimi, Amir Karwatisari, Rina Kurniawan, Luthfiyah Azzahra Kusnadi Lala Septem Riza Lepir, Yenika Rambu Luthfia, Ihda Siti Mr Amprasto Mrs Yanti Hamdiyati Mubiar Agustin Muhammad Rasyid Abdillah Muslihah, Fitriyyatul Muslim Muslim Muzzamir Nanang Winarno Ngandoh, Satwika Trianti Nono Sutarno Nur Rahman, Nur Nurhayati Nurhayati Nuryani Rustaman Oemar, Fahmi Purwati K. Suprapto Putra, Berry Arta Putri, Iffa Ichwani Putri, Meirin Dwiningtyas Qisthi, Naufalia Raffila Irawan, Raja Rahmi, Annisa Salsyabila Riandi Riandi Riandi Riki Zaputra Rini Solihat Ririn Handayani Risma Munandar, Rifki Rizqa Anita Rohimah, Tina Rizqiyati Rosinta Septiana, Rosinta Saefudin Saefudin Salsabila, Azura Sapriyanda Saputra, Winata Tegar Saputri, Nova Vivi Clara Sepita Ferazona seswandi, agus Sihombing, Rizky Agassy Siti Sriyati Sri Bulan Nasution Sri Redjeki Sunandar, Aris Suwandi, Tri Syaakir, Ibnu Syahirah, St Syahirah Syahirah, St. Syahsudarmi, Siti Sylva Sagita Tamba, Yusnita Renata Taufik Rahman Tengku Idris, Tengku Topik Hidayat Tri Nanda, Satria Umar, Mohammad Farhan Venty, Venty Sugih Hartini Verawati, Yenni Wahidin, Naufal Rabah Waris Wuyung WB Widi Purwianingsih Winarno*, Nanang YAYAN SANJAYA Yogi Yunefri, Yogi Yusnidar Yusnidar Yusuf Ibrahim Zakiya, Umi Sayidatus Zulhendra, Zulhendra