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All Journal Jurnal Ilmiah Soulmath : Jurnal Edukasi Pendidikan Matematika Jurnal Absis : Jurnal Pendidikan Matematika dan Matematika Jurnal Riset Pembelajaran Matematika Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika GAUSS: Jurnal Pendidikan Matematika Jurnal Math-UMB.EDU EMTEKA: Jurnal Pendidikan Matematika Plusminus: Jurnal Pendidikan Matematika Integral : Jurnal Penelitian Pendidikan Matematika MATH-EDU: Jurnal Ilmu Pendidikan Matematika Pedagogy : Jurnal Pendidikan Matematika Inovasi Matematika (Inomatika) Media Pendidikan Matematika
Novaliyosi
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Computer Science & IT Education Environmental Science Mathematics Social Sciences Other

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Journal : Jurnal Math-UMB.EDU

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DEVELOPMENT OF ESSAY INSTRUMENT TO MEASURE MATHEMATICAL CONCEPTUAL UNDERSTANDING ON SIMILARITY AND CONGRUENCE: Banten, Indonesia Wahyu Utomo, Muhammad Faruq; Novaliyosi; Aan Hendrayana; Abdul Fatah
Jurnal Math-UMB.EDU Vol. 13 No. 2 (2026): MARCH
Publisher : Universitas Muhammadiyah Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36085/math-umb.edu.v13i2.8530

Abstract

This study aims to develop a valid and reliable essay test instrument to assess mathematical conceptual understanding in ninth-grade junior high school students, focusing on similarity and congruence. Employing a modified 4D model (Define, Design, Develop, Disseminate), the research involved designing a test blueprint based on seven conceptual understanding indicators, expert validation using the Content Validity Ratio (CVR), and field testing to evaluate construct validity, reliability, item difficulty, and discrimination indices. The results indicated that all test items were valid, achieved a high reliability coefficient (α = 0.83), and exhibited varied difficulty and discrimination levels meeting established criteria. Consequently, this instrument is capable of comprehensively measuring students' conceptual understanding and serves as an effective assessment tool in mathematics education. Keywords: Essay Instrument, Mathematical Conceptual Understanding, Similarity and Congruence.
Co-Authors Aan Hendrayana Abdul Fatah Ali, Faqih Haidar Anandita Eka Febriana Anwar Mutaqin Anwar Mutaqin Farmah, Elisha Hayati, Rohimatul Heni Pujiastuti Heni Pujiastuti Hepsi Nindiasari Hepsi Nindiasari Hilda Maulidiansy Hulwani, Almas Zati Ipat Karomah, Fitria Kusumo, Bangun Jati M. Rosyadi Maman Fathurrohman Maman Fathurrohman, Maman Maya Sintya Sumarna Muslimah, Amelia Mustafa, Ade Nandang Nurul Anriani Retno Wulandari Sektiwulan, Adelia Suwarto Suwarto SYAMSURI Umroh Wahyu Utomo, Muhammad Faruq Yani Setiani, Yani Yuyu Yuhana Yuyu Yuhana, Yuyu