Okky Riswandha Imawan

@uncen.ac.id

Mathematics Education; Educational Research and Evaluation
Universitas Cenderawasih

Okky Riswandha Imawan


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https://researchid.co/okky_riswandha

RESEARCH, TEACHING, or OTHER INTERESTS

Education, Computational Mathematics, Computer Science
12

Scopus Publications

302

Scholar Citations

9

Scholar h-index

9

Scholar i10-index

Scopus Publications

  • Investigating Differential Item Functioning (DIF) in Geometry Test Scores: Holistic vs. Analytical Scoring Rubrics
    Raoda Ismail, Okky Riswandha Imawan, Heri Retnawati, Haryanto
    Jurnal Pengukuran Psikologi Dan Pendidikan Indonesia, 2026
    The use of polytomous data in test instruments enables more detailed assessment of test-takers' abilities, but group differences, such as gender, class, and ethnicity, are often overlooked. Differential Item Functioning (DIF) analysis helps determine whether these identities influence test performance. This descriptive quantitative study examines DIF in geometry tests using Holistic and Analytical Scoring Rubrics across gender, class, and ethnic groups. The study involved 102 undergraduate students from Cenderawasih University, Papua, who completed a geometry test with 10 descriptive questions. Two scoring rubrics were used: the Holistic Scoring Rubric with three categories and the Analytical Scoring Rubric with five. Results were analyzed with the difR package in the R Program. The criterion for detecting DIF is a p-value less than 0.05. Findings show that some test items exhibit DIF concerning gender, class, and ethnicity. The DIF detected for the holistic scoring rubric is items 1, 6, 7, and 10 for the gender group; items 1, 4, 5, and 8 for the class group; and items 1, 2, and 6 for the ethnic group. Meanwhile, the DIF detected for the analytic scoring rubric is item 10 for the gender group; items 9 and 10 for the class group; and item 10 for the ethnic group. However, not all DIF items are flawed; some assess fundamental skills. The Analytical Rubric demonstrated slightly higher reliability (alpha 0.903) than the Holistic Rubric (alpha 0.804). These insights support the development of more equitable and sustainable assessment practices, ensuring fairness and inclusivity in educational evaluations.
  • Predictive model of mathematical literacy ability, specifically university students' critical thinking skills: A case study on the inappropriateness of multilevel regression
    Pitriana Tandililing, Bettisari Napitupulu, Okky Riswandha Imawan, Raoda Ismail
    Journal of Education and E Learning Research, 2025
    This study aims to analyze the influence of Project-Based Learning (PjBL) and Guided Discovery Learning (GDL) on students' critical thinking skills in geometry focusing on mathematical literacy within geometry content. Specifically, it examines the effects of self-confidence, mathematical literacy scores, and gender on critical thinking skills and compares the predictive accuracy of multiple linear regression and multilevel regression models. A quantitative approach with regression analysis was used. Multiple linear regression and multilevel regression models were applied to assess the relationships among variables. Model accuracy was evaluated using intraclass correlation coefficients (ICC) to determine the impact of class-level grouping. Self-confidence and mathematical literacy in geometry significantly influenced students' critical thinking skills. Gender showed no significant effect. The multiple linear regression model outperformed the multilevel model as reflected by lower ICC values, indicating that class grouping did not substantially affect critical thinking outcomes. Internal factors, such as confidence and subject mastery are more critical to students’ critical thinking development than external factors like gender or class grouping. Teachers should prioritize enhancing students’ confidence and content mastery through well-designed instructional strategies to foster critical thinking in mathematics learning.
  • The challenges of implementing computerized adaptive testing in Indonesia
    Okky Riswandha Imawan, Heri Retnawati, Haryanto Haryanto, Raoda Ismail
    Journal of Education and E Learning Research, 2025
    This study explores the challenges of implementing computerized adaptive testing (CAT) for mathematics assessment among prospective elementary school teachers in Indonesia. It aims to describe (1) assessment practices of mathematics lecturers and (2) challenges in adopting CAT. Using a qualitative phenomenological approach, data were collected from 17 mathematics lecturers across Indonesia through questionnaires followed by in-depth interviews with four lecturers unfamiliar with or struggling to use CAT. Findings indicate that paper-and-pencil tests and computer- based testing (CBT) dominate university assessments. Key barriers to CAT adoption include limited lecturer knowledge and skills, technical constraints, inadequate infrastructure, and incompatibility with essay-based assessments. Despite these challenges, lecturers express interest in a more accessible and cost-effective CAT. The study concludes that lecturers acknowledge CAT’s potential to enhance fairness and accuracy in testing while they face difficulties in its implementation. A targeted CAT development program aligned with lecturers' needs with institutional support is essential for successful integration. CAT has the potential to improve assessment effectiveness and efficiency in Indonesian universities aligning with technological advancements and 21st-century education trends.
  • A Sustainable Development Approach to Math Higher-Order Thinking Skills: Culture and Green Technology
    Raoda Ismail, Heri Retnawati, Sugiman, Okky Riswandha Imawan
    Lecture Notes in Civil Engineering, 2025
  • Innovations in Assessment Methods: Computerized Adaptive Testing (CAT) for Sustainable Energy Efficiency
    Okky Riswandha Imawan, Heri Retnawati, Haryanto Haryanto, Raoda Ismail
    Lecture Notes in Civil Engineering, 2025
  • Confirmatory factor analysis and differential item functioning analysis on mathematical literacy instruments for prospective Indonesian elementary school teachers
    Okky Riswandha Imawan, Heri Retnawati, Haryanto, Raoda Ismail
    Aip Conference Proceedings, 2024
  • Construct validity of mathematics high order thinking skills instrument with cultural context: Confirmatory factor analysis
    Raoda Ismail, Heri Retnawati, Sugiman, Okky Riswandha Imawan
    Aip Conference Proceedings, 2024
  • Contexts proposed by teachers in Papua for developing mathematics hots assessment instruments: A phenomenological study
    Raoda Ismail, Heri Retnawati, Sugiman, Novita Intan Arovah, Okky Riswandha Imawan
    Journal of Education and E Learning Research, 2024
    The success of a school centers on teachers' ability to create well-aligned educational tools. The Merdeka Belajar curriculum requires adapting assessments, including Higher-Order Thinking Skills (HOTS) questions for real-world problem-solving scenarios. This study explored contexts proposed by teachers in Papua for developing Mathematics HOTS questions. A phenomenological approach within a qualitative framework was employed involving 24 mathematics teachers from public and private schools in focus group discussions. Participants included twenty teachers from Papua, two from Central Indonesia and two from Western Indonesia. Additionally, five teachers from Papua participated in in-depth interviews. Data was analyzed using Creswell’s model with Atlas.ti software. Teachers developed HOTS assessment instruments based on daily life, scientific and social contexts. However, no cultural contexts were incorporated into these instruments by the interviewed teachers. This study highlights the importance of teacher preparedness in aligning contextual learning with the Merdeka Belajar curriculum and reveals a significant gap in using cultural contexts for HOTS assessments among teachers in Papua. These insights contribute to the discourse on math education in Indonesia advocating for the integration of cultural elements into the freedom to learn initiative.
  • Optimal Scale Points for Reliable Measurements: Exploring the Impact of Scale Point Variation
    Raoda Ismail, Heri Retnawati, Sugiman Sugiman, Farida Agus Setiawati, Okky Riswandha Imawan, Purwoko Haryadi Santoso
    Jurnal Pengukuran Psikologi Dan Pendidikan Indonesia, 2024
    Ensuring reliable measurements is crucial for minimising errors in assessments. The assessmentcommunity commonly employs the evaluation of reliability coefficients to estimate the dependability oftest scores. Despite its significance, limited research has explored the relationship between the estimated reliability coefficient and the number of scale points utilised. This study aims to provide valuable insights to practitioners by investigating the optimal number of scale points required for the most accurate reliability coefficient estimation. Using simulated data, the research scrutinises scales with varying points, ranging from 2 to 11. The results reveal a substantial impact of the number of scale points on reliability estimation. The most accurate estimate of reliability is obtained for scales with 8 points. This study helps us understand the optimal number of scale points for reliable measurements and guides future assessment improvements.
  • The influence of interest in learning mathematics on mathematics learning achievement of junior high school students in Papua
    Raoda Ismail, Okky Riswandha Imawan, Aimmatun Nadhifah
    Aip Conference Proceedings, 2023
  • Application of cooperative learning model type of teams games tournament using question card learning media on sine and cosine rules
    Okky Riswandha Imawan, Raoda Ismail, Pitriana Tandililing, Faradiba Nur Aisyah
    Aip Conference Proceedings, 2023
  • Employing Higher Order Thinking Skills-based Instruction in History Course: A History High School Teacher's Perspective
    Susanto T. Handoko, Yayuk Mardiati, Raoda Ismail, Okky Riswandha Imawan
    Aip Conference Proceedings, 2023

RECENT SCHOLAR PUBLICATIONS

  • TRANSFORMASI ALAT PERAGA SEKOLAH DASAR DI ERA MODERN: Inovasi Media Pembelajaran Interaktif untuk Sains, Sosial, Bahasa, Karakter, dan Numerasi
    SM Ohee, ST Handoko, R Ismail, OR Imawan, AD Yonggom, R Efendi, ...
    EDUPEDIA Publisher, 1-184 , 2026
    2026
  • DIALEKTIKA ALAT PERAGA MATEMATIKA: Kolaborasi Alat Peraga Konvensional dan Digital dalam Ekosistem Pembelajaran Abad 21
    OR Imawan, R Ismail
    EDUPEDIA Publisher, 1-289 , 2026
    2026
  • ASESMEN DAN PENGKLASTERAN KEMAMPUAN LITERASI MATEMATIKA CALON GURU SD
    OR Imawan, H Retnawati, H Haryanto, R Ismail
    EDUPEDIA Publisher, 1-182 , 2025
    2025
  • Teknologi dalam Pendidikan Tinggi: Strategi Pengajaran Modern
    MI Dacholfany, F Muhdar, S Prabandari, R Ismail, G Tarmon, OR Imawan, ...
    EDUPEDIA Publisher, 1-177 , 2025
    2025
  • Predictive Model of Mathematical Literacy Ability, Specifically University Students' Critical Thinking Skills: A Case Study on the Inappropriateness of Multilevel Regression.
    P Tandililing, B Napitupulu, OR Imawan, R Ismail
    Journal of Education and e-Learning Research 12 (3), 507-519 , 2025
    2025
    Citations: 3
  • The Challenges of Implementing Computerized Adaptive Testing in Indonesia.
    OR Imawan, H Retnawati, R Ismail
    Journal of Education and E-Learning Research 12 (2), 124-144 , 2025
    2025
    Citations: 2
  • A Sustainable Development Approach to Math Higher-Order Thinking Skills: Culture and Green Technology
    R Ismail, H Retnawati, Sugiman, OR Imawan
    Lecture Notes in Civil Engineering 557 (2), 137-143 , 2025
    2025
  • Innovations in Assessment Methods: Computerized Adaptive Testing (CAT) for Sustainable Energy Efficiency
    OR Imawan, H Retnawati, H Haryanto, R Ismail
    Lecture Notes in Civil Engineering 557 (2), 161-168 , 2025
    2025
    Citations: 2
  • Pembelajaran dengan Problem Based Learning: Strategi dan Implementasi
    R Ismail, A Anas, A Nasrullah, A Arianto, Y Sulfiati, E Ernawati, MS Kau, ...
    EDUPEDIA Publisher, 1-206 , 2024
    2024
    Citations: 7
  • Construct validity of mathematics high order thinking skills instrument with cultural context: Confirmatory factor analysis
    R Ismail, H Retnawati, Sugiman, OR Imawan
    AIP Conference Proceedings 3150 (1), 080008 , 2024
    2024
    Citations: 7
  • Confirmatory factor analysis and differential item functioning analysis on mathematical literacy instruments for prospective Indonesian elementary school teachers
    OR Imawan, H Retnawati, Haryanto, R Ismail
    AIP Conference Proceedings 3150 (1), 080009 , 2024
    2024
  • Pembelajaran Berbasis Proyek di Perguruan Tinggi: Teori dan Praktik
    L Mariya, DC Ningrum, AE Kusuma, MF Sya’ban, S Inayah, E Susanto, ...
    EDUPEDIA Publisher, 1-183 , 2024
    2024
    Citations: 6
  • Optimal Scale Points for Reliable Measurements: Exploring the Impact of Scale Point Variation
    R Ismail, H Retnawati, S Sugiman, FA Setiawati, OR Imawan, PH Santoso
    JP3I (Jurnal Pengukuran Psikologi dan Pendidikan Indonesia) 13 (1), 44-56 , 2024
    2024
    Citations: 4
  • PERKEMBANGAN PESERTA DIDIK: Sebuah Teori dan Tinjauan Kritis
    R Ismail, L Rusiati, N Azimah, E Sihombing, I Puspita, L Partiningsih, ...
    EDUPEDIA Publisher, 1-255 , 2024
    2024
    Citations: 1
  • Contexts Proposed by Teachers in Papua for Developing Mathematics HOTS Assessment Instruments: A Phenomenological Study.
    R Ismail, H Retnawati, NI Arovah, OR Imawan
    Journal of Education and E-Learning Research 11 (3), 548-556 , 2024
    2024
    Citations: 6
  • The influence of interest in learning mathematics on mathematics learning achievement of junior high school students in Papua
    R Ismail, OR Imawan, A Nadhifah
    AIP Conference Proceedings 2811 (1), 020013 , 2023
    2023
    Citations: 6
  • Application of cooperative learning model type of teams games tournament using question card learning media on sine and cosine rules
    OR Imawan, R Ismail, P Tandililing, FN Aisyah
    AIP Conference Proceedings 2811 (1), 020012 , 2023
    2023
    Citations: 6
  • Perencanaan Pembelajaran Matematika
    OR Imawan, A Asmara, Z Nuraeni, R Ismail, I Hamidah, R Sugiaty
    2023
    Citations: 5
  • Five priority character values: Content analysis in the independent curriculum mathematics textbook in Indonesia
    R Ismail, OR Imawan
    International Journal of Mathematics and Mathematics Education (IJMME) 1 (2 … , 2023
    2023
    Citations: 14
  • Analysis of character education values on the learning achievement of elementary school teacher candidates
    OR Imawan, R Ismail
    International Journal of Mathematics and Mathematics Education (IJMME) 1 (2 … , 2023
    2023
    Citations: 32

MOST CITED SCHOLAR PUBLICATIONS

  • Perbandingan antara keefektifan model guided discovery learning dan project-based learning pada matakuliah geometri
    OR Imawan
    Pythagoras: Jurnal Matematika dan Pendidikan Matematika 10 (2), 179-188 , 2015
    2015.0
    Citations: 57
  • Meningkatkan penguasaan TPACK guru di papua melalui pelatihan pembuatan video pembelajaran pada masa pandemi covid-19
    R Ismail, OR Imawan
    JMM (Jurnal Masyarakat Mandiri) 5 (1), 277-288 , 2021
    2021.0
    Citations: 39
  • Analysis of character education values on the learning achievement of elementary school teacher candidates
    OR Imawan, R Ismail
    International Journal of Mathematics and Mathematics Education (IJMME) 1 (2 … , 2023
    2023.0
    Citations: 32
  • Meningkatkan kompetensi guru matematika dalam mengembangkan media pembelajaran 4.0 melalui pelatihan aplikasi geogebra
    OR Imawan, R Ismail
    Jurnal Masyarakat Mandiri 4 (6), 1230-1239 , 2020
    2020.0
    Citations: 21
  • Five priority character values: Content analysis in the independent curriculum mathematics textbook in Indonesia
    R Ismail, OR Imawan
    International Journal of Mathematics and Mathematics Education (IJMME) 1 (2 … , 2023
    2023.0
    Citations: 14
  • The Effectiveness of Problem-based Learning in Terms of Learning Achievement, Problem-Solving, and Self-Confidence
    R Ismail, OR Imawan
    The International Conference on Current Issues in Education (ICCIE 2021) 5 … , 2022
    2022.0
    Citations: 13
  • Model Pembelajaran Project-Based Learning dan Probem-Based Learning Untuk Ketercapaian Tujuan Pembelajaran Siswa SMP
    R Ismail, H Retnawati, O Imawan
    OSF , 2021
    2021.0
    Citations: 13
  • Employing higher order thinking skills-based instruction in history course: A history high school teacher’s perspective
    ST Handoko, Y Mardiati, R Ismail, OR Imawan
    AIP conference proceedings 2679 (1), 070004 , 2023
    2023.0
    Citations: 12
  • Student’s Self-Confidence Change Through the Application of the Guided Discovery Learning Model
    OR Imawan
    The International Conference on Current Issues in Education (ICCIE 2021) 5 … , 2022
    2022.0
    Citations: 12
  • Pembelajaran dengan Problem Based Learning: Strategi dan Implementasi
    R Ismail, A Anas, A Nasrullah, A Arianto, Y Sulfiati, E Ernawati, MS Kau, ...
    EDUPEDIA Publisher, 1-206 , 2024
    2024.0
    Citations: 7
  • Construct validity of mathematics high order thinking skills instrument with cultural context: Confirmatory factor analysis
    R Ismail, H Retnawati, Sugiman, OR Imawan
    AIP Conference Proceedings 3150 (1), 080008 , 2024
    2024.0
    Citations: 7
  • Cluster analysis of the national examination: School grouping to maintain the sustainability of high school quality
    R Ismail, H Retnawati, OR Imawan
    REID (Research and Evaluation in Education) 8 (1), 13-23 , 2022
    2022.0
    Citations: 7
  • Instrument test development of mathematics skill on elementary school
    SWD Pomalato, R Ismail, AO Harefa, OR Imawan, BA Ningsi, D Wulandari
    Turkish Journal of Computer and Mathematics Education 12 (6), 2447-2455 , 2021
    2021.0
    Citations: 7
  • Pembelajaran Berbasis Proyek di Perguruan Tinggi: Teori dan Praktik
    L Mariya, DC Ningrum, AE Kusuma, MF Sya’ban, S Inayah, E Susanto, ...
    EDUPEDIA Publisher, 1-183 , 2024
    2024.0
    Citations: 6
  • Contexts Proposed by Teachers in Papua for Developing Mathematics HOTS Assessment Instruments: A Phenomenological Study.
    R Ismail, H Retnawati, NI Arovah, OR Imawan
    Journal of Education and E-Learning Research 11 (3), 548-556 , 2024
    2024.0
    Citations: 6
  • The influence of interest in learning mathematics on mathematics learning achievement of junior high school students in Papua
    R Ismail, OR Imawan, A Nadhifah
    AIP Conference Proceedings 2811 (1), 020013 , 2023
    2023.0
    Citations: 6
  • Application of cooperative learning model type of teams games tournament using question card learning media on sine and cosine rules
    OR Imawan, R Ismail, P Tandililing, FN Aisyah
    AIP Conference Proceedings 2811 (1), 020012 , 2023
    2023.0
    Citations: 6
  • Meningkatkan kompetisi guru matematika dalam mengembangkan media pembelajaran 4.0 melalui pelatihan aplikasi geogebra. JMM (Jurnal Masyarakat Mandiri), 4 (6), 1230-1239
    OR Imawan, R Ismail
    2020.0
    Citations: 6
  • Perencanaan Pembelajaran Matematika
    OR Imawan, A Asmara, Z Nuraeni, R Ismail, I Hamidah, R Sugiaty
    2023.0
    Citations: 5
  • Y., Arianto, Nasrullah, A., Anas, & Yuliati, Y.(2024). Pembelajaran dengan Problem Based Learning: Strategi dan Implementasi. CV
    R Ismail, OR Imawan, S Inayah, N Trisnawati, MS Kau, S Ernawati
    Edupedia Publisher , 0
    Citations: 5