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All Journal Indonesian Journal of Islamic Education
Rosalia Annisa Putri
Universitas Jember
Religion Humanities Education

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Karakteristik Psikometrik Instrumen Tes Kemampuan Akademik (TKA) Matematika Materi Pecahan untuk Siswa Sekolah Dasar Rosalia Annisa Putri; Tri Astari
Indonesian Journal of Islamic Education Vol. 4 No. 2 (2026): Agustus 2026 In Press
Publisher : Department of PAI, Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/ijie.v4i2.19827

Abstract

The quality of mathematics assessment depends not only on content coverage but also on how well each item functions empirically. This study aimed to analyze the psychometric characteristics of a fraction-based Mathematics Academic Competency Test (Tes Kemampuan Akademik/TKA) instrument for primary school students through empirical validity, reliability, item difficulty, and discrimination power. A quantitative descriptive item-analysis design was employed using responses from 27 sixth-grade students at SD Negeri Kaliboto Lor 07, Lumajang. The trial instrument consisted of 15 dichotomously scored items in multiple-choice and complex multiple-choice formats. Empirical validity was analyzed using Pearson item-total correlations with a critical value of r = 0.381 at α = .05. Reliability was estimated using KR-20, while item difficulty and discrimination were analyzed within classical test theory. Ten of the 15 items met the empirical validity criterion, whereas five were eliminated. The KR-20 coefficient was 0.70. Among the retained items, seven were moderately difficult, two difficult, and one easy; four showed good discrimination and six showed fair discrimination. The findings indicate adequate preliminary psychometric quality, although broader validation with larger, multisite samples is still required before wider use.
Co-Authors Tri Astari