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All Journal Journal of Mathematics Instruction, Social Research and Opinion Multi Proximity: Jurnal Statistika Universitas Jambi
Faradila, Oryza Vini
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Humanities Education Languange, Linguistic, Communication & Media Mathematics Social Sciences

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Analisis Produksi Kelapa Sawit Provinsi Jambi dengan Regresi Linier Berganda Faradila, Oryza Vini; Syafmen, Wardi
Multi Proximity: Jurnal Statistika Vol. 2 No. 2 (2023): Applied Statistics
Publisher : Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/multiproximity.v2i2.30664

Abstract

Kelapa sawit merupakan salah satu komoditas hasil perkebunan yang mempunyai peran cukup penting dalam kegiatan perekonomian di Indonesia karena kemampuannya menghasilkan minyak nabati yang banyak dibutuhkan oleh sektor industri. Produksi kelapa sawit sangat penting bagi suatu daerah untuk meningkatkan kegiatan perekonomian. Ada beberapa factor yang mempengaruhi produksi kelapa sawit yaitu luas lahan dan jumlah pokok. untuk mengetahui factor-faktor tersebut apakah berpengaruh terhadap produksi kelapa sawit dapat menggunakan salah satu teknik matematika yaitu analisis regresi berganda. Berdasarkan hasil analisis dan pembahasan maka dapat disimpulkan bahwa Luas secara parsial memberikan pengaruh signifikan terhadap Produksi Kelapa Sawit Di Provinsi Jambi dan Jumlah Pokok secara parsial tidak memberikan pengaruh signifikan terhadap Produksi Kelapa Sawit Di Provinsi Jambi. Sedangkan Luas dan Jumlah Pokok  secara simultan (bersama-sama) berpengaruh dan signifikan terhadap Produksi Kelapa Sawit Di Provinsi Jambi.
Psychometric Evaluation of a Metaphorical Thinking Instrument in Mathematics Learning: Graded Response Model Faradila, Oryza vini; Falani, Ilham; Mujahidawati, Mujahidawati
Journal of Mathematics Instruction, Social Research and Opinion Vol. 4 No. 4 (2025): December
Publisher : MASI Mandiri Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58421/misro.v4i4.873

Abstract

This study aims to develop and psychometrically validate an assessment instrument designed to measure students’ metaphorical thinking ability in mathematics learning, with a specific focus on the Pythagorean Theorem. The instrument was developed using a Research and Development (R&D) framework based on the Oriondo and Antonio model, encompassing test design, empirical tryout, and measurement stages. Six polytomous essay items were constructed according to six indicators of metaphorical thinking: connect, relate, explore, analyze, transform, and experience. Content validity was established through expert judgment using Aiken’s V coefficient, with all items exceeding the minimum validity threshold, indicating strong agreement among experts. Empirical validation was conducted using Item Response Theory (IRT) with the Graded Response Model (GRM), selected for its suitability in analyzing ordered polytomous response data. The results demonstrate that the instrument satisfies the unidimensionality assumption, exhibits strong item discrimination parameters, and shows good model fit across all items. Analysis of the Test Information Function indicates high measurement precision within the ability range of θ −1 to +1, confirming strong local reliability. These findings indicate that the developed instrument is valid, reliable, and capable of providing accurate diagnostic information regarding students’ ability to construct mathematical meaning through metaphors. The study contributes methodologically by demonstrating the applicability of GRM-based IRT analysis for essay-type instruments and substantively by supporting the assessment of higher-order cognitive processes in mathematics learning.
Co-Authors Ilham Falani Mujahidawati, Mujahidawati Wardi Syafmen