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All Journal Hydrogen: Jurnal Kependidikan Kimia Journal of Artificial Intelligence and Digital Business UNESA Journal of Chemical Education
Hidayah, Rahayu Nur
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Chemistry Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Other

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ANALYSIS OF MULTIPLE REPRESENTATION ABILITIES OF MALE AND FEMALE GRADE STUDENT AT SMAN 1 TANJUNGANOM IN ACID-BASE MATERIAL Hidayah, Rahayu Nur; Ardhana, Ivan Ashif
UNESA Journal of Chemical Education Vol. 13 No. 1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ujced.v13n1.p52-59

Abstract

The field of chemistry has become one of the abstract sciences, particularly in the context of acid-base materials, thus requiring the integration of multiple representations. Incomplete multiple representation abilities in students can lead to difficulties in understanding acid-base materials. Therefore, this research aims to analyze (1) the level of students' multiple representation abilities in acid-base materials and (2) the differences in the levels of multiple representation abilities between male and female students. The research method used is a comparative ex-post facto approach with a quantitative approach. The research instruments include test questions based on the DAC framework and interview sheets. The results of this research are as follows: (1) the average level of multiple representation abilities is 20%, categorized as very poor. The percentages of multiple representation abilities based on the DAC framework are 29% for definition, 18% for algorithmic, and 20% for conceptual. The highest percentage in the DAC framework indicators is D-R at 32%, while the lowest percentage is C-O at 11%. (2) There is a difference in the levels of multiple representation abilities between male and female students, as evidenced by the results of the Mann-Whitney U test, with an Asymp. Sig. (2-tailed) value of 0.000 ≤ 0.05.
Development of Assessment Tools for Understanding Submicroscopic Representations in Acid-Base Material Ardhana, Ivan Ashif; Hidayah, Rahayu Nur; ‘Aisy, Syandifa Rohadlotul; Ijtihadah, Mustabsyirotul
Hydrogen: Jurnal Kependidikan Kimia Vol 13, No 1 (2025): February 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i1.14328

Abstract

Acid-base material should ideally be evaluated holistically through the triplet of macroscopic, submicroscopic, and symbolic representations. However, the assessments conducted so far have primarily not evaluated the ability to understand submicroscopic representations and still focus on macroscopic and symbolic representations. Therefore, this research aims to develop an instrument for assessing submicroscopic understanding of acid-base material and analyze its feasibility. The research method used is the 4D model development, carried out up to the develop stage. The results of the content validation by expert validators yielded an average score of 91.2%, which falls into the very valid category. The empirical test results on 116 chemistry teachers and prospective chemistry teachers showed that all items on the instrument were valid with a reliability of 0.60, which falls into the reliable category. Moreover, the instrument has varying levels of difficulty index and discrimination power. The test items' character in the instrument assesses understanding of submicroscopic representations of acid-base concepts such as solution properties, acid strength, acid constant, pH, and degree of dissociation. The recommendation for further research is the need to develop and apply submicroscopic understanding questions in other chemistry topics as a reinforcement in the assessment and evaluation process of chemistry learning.
Pengaruh Total Asset Turnover dan Debt to Asset Ratio terhadap Return on Asset pada PT Telekomunikasi Indonesia (Persero) Tbk. Periode Tahun 2014–2024 Hidayah, Rahayu Nur; Faisal, Faisal
RIGGS: Journal of Artificial Intelligence and Digital Business Vol. 4 No. 3 (2025): Agustus - October
Publisher : Prodi Bisnis Digital Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/riggs.v4i3.2551

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh Total Asset Turnover (TATO) dan Debt to Asset Ratio (DAR) terhadap Return on Asset (ROA) pada PT Telekomunikasi Indonesia (Persero) Tbk. periode tahun 2014 hingga 2024. Jenis penelitian ini adalah kuantitatif. Metode analisis yang digunakan adalah uji analisis statistik deskriptif, uji asumsi klasik, Regresi Linier Berganda, Koefisien Korelasi, Koefisien Determinasi, Uji T dan Uji F menggunakan aplikasi SPSS versi 26. Populasi dalam penelitian ini adalah seluruh laporan keuangan PT Telekomunikasi Indonesia (Persero) Tbk, sedangkan sampel yang digunakan adalah laporan laba/rugi dan posisi keuangan konsolidasian PT Telekomunikasi Indonesia (Persero) Tbk Periode 2014-2024. Hasil uji t menunjukkan Total Asset Turnover Ratio (TATO) memiliki nilai thitung > ttabel(3,570 > 2,306) dengan sign 0,007 < 0,05 sehingga secara parsial, Total Asset Turnover Ratio (TATO) berpengaruh secara signifikan terhadap Return on Asset (ROA). Sedangkan Debt to Asset Ratio (DAR) memiliki nilai thitung < ttabel (– 0,657 < 2,306) dengan sign 0,530 > 0,05 sehingga secara parsial, Debt to Asset Ratio (DAR) tidak berpengaruh secara signifikan terhadap Return on Asset (ROA). Hasil uji f menunjukkan bahwa nilai sign sebesar 0,002 <0,05 dan Fhitung > Ftabel (14,52 > 4,46) sehingga secara simultan, Total Asset Turnover Ratio (TATO) dan Debt to Asset Ratio (DAR) berpengaruh signifikan terhadap Return on Asset (ROA).
Development of Assessment Tools for Understanding Submicroscopic Representations in Acid-Base Material Ardhana, Ivan Ashif; Hidayah, Rahayu Nur; ‘Aisy, Syandifa Rohadlotul; Ijtihadah, Mustabsyirotul
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 1 (2025): February 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i1.14328

Abstract

Acid-base material should ideally be evaluated holistically through the triplet of macroscopic, submicroscopic, and symbolic representations. However, the assessments conducted so far have primarily not evaluated the ability to understand submicroscopic representations and still focus on macroscopic and symbolic representations. Therefore, this research aims to develop an instrument for assessing submicroscopic understanding of acid-base material and analyze its feasibility. The research method used is the 4D model development, carried out up to the develop stage. The results of the content validation by expert validators yielded an average score of 91.2%, which falls into the very valid category. The empirical test results on 116 chemistry teachers and prospective chemistry teachers showed that all items on the instrument were valid with a reliability of 0.60, which falls into the reliable category. Moreover, the instrument has varying levels of difficulty index and discrimination power. The test items' character in the instrument assesses understanding of submicroscopic representations of acid-base concepts such as solution properties, acid strength, acid constant, pH, and degree of dissociation. The recommendation for further research is the need to develop and apply submicroscopic understanding questions in other chemistry topics as a reinforcement in the assessment and evaluation process of chemistry learning.
Co-Authors Ardhana, Ivan Ashif ‘Aisy, Syandifa Rohadlotul Faisal Faisal Ijtihadah, Mustabsyirotul ‘Aisy, Syandifa Rohadlotul