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All Journal International Journal of Evaluation and Research in Education (IJERE) Journal of Nonformal Education JPsd ( Jurnal Pendidikan Sekolah Dasar ) Edu Sains: Jurnal Pendidikan Sains dan Matematika JISAE (Journal of Indonesian Student Assesment and Evaluation) Faktor Jurnal Ilmiah Kependidikan RESEARCH AND DEVELOPMENT JOURNAL OF EDUCATION (RDJE) Motor Bakar : Jurnal Teknik Mesin Jurnal Akrab (Aksara agar Berdaya) Journal of Vocational Education and Automotive Technology International Journal of STEM Education for Sustainability Indonesian Journal of Research and Educational Review (IJRER) Jurnal Teknik Mesin Sinergi Educational Technology Journal STATISTIKA Jurnal Teknik Mesin
Ikhsanudin, Ikhsanudin
Universitas Sultan Ageng Tirtayasa
Religion Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Education Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Estimation of Cronbach reliability based on sample size, gender, and the grades Ikhsanudin Ikhsanudin; Bambang Subali; Heri Retnawati; Edi Istiyono
International Journal of Evaluation and Research in Education (IJERE) Vol 13, No 2: April 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijere.v13i2.24895

Abstract

The study tries to see the effect of different sample sizes on the reliability of creativity tests using Cronbach’s alpha. In addition, the background of the sample (gender and grade) is also detected. The study has a practical significance for designing a sample for estimating reliability using Cronbach alpha. The secondary data are used for analysis. The sample of creativity test is determined purposively, that is, has been administered to 1,960 students. The α-coefficient calculation uses the SPSS program. The result proves in the total sample, the creativity test is reliable (α=0.852). In small sample sizes, the α-coefficients values vary greatly in the different test groups. In the larger sample size, the α-coefficients are closer to constant in the different test groups. For a polytomous scale test with a length of 20 items, the α-coefficients obtained close to constant on the sample size of more than 80 testees. This result indicates for the optimum result the sample size is at least four times larger than the number of test items in reliability analysis, especially Cronbach alpha. Based on the gender aspect, descriptively the α-coefficient in the male group (0.846) was almost equal to the female group (0.851). By grouping the testees based on the grades, there are slight differences in α-coefficients in class IV (0.850), class V (0.841), and class VI (0.809). Regarding the results of this study, in the reliability estimation of test development, it is suggested to consider the adequacy and the characteristic of samples.
Constructing the Formative Test for Diagnosing Misconceptions of First-Semester High School Biology Ikhsanudin, Ikhsanudin; Subali, Bambang
ETDC: Indonesian Journal of Research and Educational Review Vol. 1 No. 4 (2022): September
Publisher : Education and Talent Development Center Indonesia (ETDC Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51574/ijrer.v1i4.629

Abstract

A misconception is one of the learning obstacles that often occurs in biology class. This study aims to construct a diagnostic instrument to detect misconceptions of biological concepts during the first semester of senior high school and test the quality of the developed instrument. The instrument development model used was a modification of the Oriondo, Dallo-Antonio, and Azwar models. The construction begins with planning the measuring domain and preparing the blueprint for the test instrument. The processes were followed by an instrument seminar, peer review, expert judgment validation, and trying out the test on 885 students. In addition, an unstructured interview with the teachers determines the feasibility of the test instrument. The test content validity according to the Aiken formula is 0.85; the items have different levels of difficulty and good discriminating power; the number of 62 items fits the partial credit model. The reliability of the test is shown by a Kappa coefficient of 0.47. Thus, the test instrument proved to be valid and reliable. Thirteen teachers from eleven schools stated that the test is worthy of use in learning. For the school level, the instrument meets the criteria of a good test instrument.
ANALISIS KESIAPAN KERJA SISWA SMKN 2 KABUPATEN TANGERANG JURUSAN TEKNIK OTOMOTIF : DILIHAT BERDASARKAN ASPEK KETERAMPILAN 4C Elfajry, Ano Efrian; Ikhsanudin, Ikhsanudin; Iman, Atep
Journal of Vocational Education and Automotive Technology Vol 6 No 1 (2024): Journal of Vocational Education and Automotive Technology
Publisher : Ivet University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/joveat.v6i1.3196

Abstract

Penelitian ini bertujuan untuk mengetahui secara empirik hubungan antara Kesiapan Kerja dengan Keterampilan 4C di SMKN 2 Kabupaten Tangerang, dan aspek yang paling berpengaruh terhadap Kesiapan Kerja. Jenis penelitian ini menggunakan pendekatan kuantitatif dengan metode survey. Adapun besaran sampel yang di ambil pada penelitian ini berjumlah 54 siswa yang di ambil dengan teknik simple random sampling. Pengumpulan data dengan menggunakan isntrumen angket dan essay. Data tersebut diolah dengan teknik analisis data statistik deskriptif dan korelasi product moment. Hasil Analisis menggunakan menunjukkan bahwa terdapat hubungan antara Kesiapan Kerja dengan Keterampilan 4C sebesar 32.7% dan sisanya sebesar 67.3% dipengaruhi oleh variabel lain, hasil korelasi product moment menunjukkan bahwa dalam penelitian ini terbukti variabel komunikasi dan kolaborasi terdapat hubungan antara kesiapan kerja, sedangkan variabel berpikir kritis dan berpikir kreatif tidak terdapat hubungan yang signifikan terhadap kesiapan kerja, hal ini dipengaruhi oleh kurangnya pada besaran sampel penelitian. Kemudian jika diurutkan aspek yang paling dominan pada variabel keterampilan 4C terhadap kesiapan kerja yaitu variabel komunikasi dengan nilai koefisien correlation sebesar 0,528 dan kolaborasi dengan nilai 0,449, dan berpikir kreatif sebesar 0,190, terakhir yaitu berpikir kritis sebesar 0,187.Kata kunci: Pendidikan SMK, Kesiapan Kerja, Keterampilan 4C
Analisis Perawatan Service Berkala 10.000Km pada Mobil Mitsubishi Pajero Sport Dakar 4x2 AT Atmojo, Dion Daroe Catoer; Ikhsanudin, Ikhsanudin
Motor Bakar : Jurnal Teknik Mesin Vol 8, No 1 (2024): Motor Bakar: Jurnal Teknik Mesin
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/mbjtm.v8i1.10529

Abstract

Mobil merupakan alat transportasi yang dirancang untuk mengangkut penumpang dan muatan dari suatu tempat ke tempat lain. Ada beberapa jenis bodi mobil, salah satunya SUV ( Sport Utiliy Vehicle). Mitsubishi Pajero Sport merupakan mobil SUV yang diproduksi olah PT. Mitsubishi Motors. Dibutuhkan perawatan service berkala untuk menjaga perfoma mesin kendaraan. Tempat penelitian dilakukan di PT. Mitsubishi Lautan Berlian Depok yang dilaksanakan pada bulan Agustus 2023 sampai dengan bulan September 2023. Service berkala bertujuan untuk memastikan kendaraan tetap pada kondisi baik, aman, dan berkerja optimal. Pelaksaan service berkala melewati 2 tahap, pemeriksaan kendaraan dan pergantian sparepart. Pelaksanaan perawatan service berkala di PT. Mitsubishi Lautan Berlian Depok.
THE IMPLEMENTATION OF THE NUMBERED HEAD TOGETHER (NHT) COOPERATIVE LEARNING MODEL TO ENHANCE STUDENT LEARNING OUTCOMES IN THE TOPIC OF MECHANICAL MEASURING INSTRUMENTS AT SMKN 1 TUNJUNG TEJA Triani, Nova; Iman, Atep; Ikhsanudin, Ikhsanudin
Educational Technology Journal Vol 4 No 1 (2024): Volume 4 Nomor 1, April 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In this study, the researchers want to find out how much better students learn mechanical measuring instruments when they use the NHT type of joint learning model compared to when they use the traditional model of learning at SMKN 1 Tunjung Teja. A non-equivalent control group approach is used in this kind of study, which is kind of like an experiment. The people who took part in this study were students in class X at TKRO SMKN 1 Tunjung Teja. A learning outcome test was used as a study tool, and the T-test and N-gain test were used to analyze the results. The results showed that the experimental class that used the NHT learning method learned a lot. They got an average score of 22.80 on the pretest and 90.80 on the posttest. The control class had an average score of 21.47 on the pre-test and 49.26 on the post-test for learning results. A significant value of 0.00 ? 0.05 was found when the independent sample t-test test was used to test the claim. The N-gain number for the experimental class was 88.10% with high criteria, while it was 35.71% for the control class with intermediate criteria. This shows that the students learned more. What this means is that using the NHT type group learning model makes learning about mechanical measuring tools much more effective.
Penerapan Preventive Maintenance Pada Mesin Cnc Forming Di Pt. Jati Steel Makmur Raffi Rajwaa; Ikhsanudin Ikhsanudin
JTM : JURNAL TEKNIK MESIN Vol 1 No 1 (2025)
Publisher : Pengelola Jurnal Politeknik Negeri Ketapang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/jtm.v1i2.1914

Abstract

Mesin CNC Spring Forming merupakan salah satu jenis mesin pembuat pegas yang paling umum digunakan dalam industri manufaktur. Mesin ini berfungsi untuk membentuk berbagai jenis material menjadi pegas, sehingga memerlukan perawatan secara berkala guna menjaga kinerja operasionalnya tetap optimal. Mengingat proses kerja mesin dapat mengalami kerusakan sewaktu-waktu, penerapan perawatan preventif menjadi langkah penting untuk meminimalkan potensi gangguan tersebut. Preventive maintenance atau perawatan yang dilakukan secara terencana bertujuan untuk mencegah terjadinya kerusakan yang tidak diinginkan serta mengidentifikasi sumber kerusakan sejak dini. Dalam penelitian ini, penulis menerapkan kegiatan preventive maintenance berdasarkan acuan literatur yang diperoleh dari sumber daring. Kegiatan ini dibagi menjadi tiga jenis pelaksanaan, yaitu kegiatan harian, mingguan, dan triwulanan. Setelah dilakukan preventive maintenance pada mesin CNC Spring Forming, diketahui bahwa permasalahan pada komponen mesin dapat diatasi dengan baik sesuai dengan data yang telah di dapat.
Psychometric Validation of a STEAM-Based Knowledge Instrument for Measuring Energy Conversion Concepts in Fifth-Grade Students Ikhsanudin Ikhsanudin; Ricky Cahyasari Putra; Ade Dwi Putra Janata; Rusdi Febriyanto; Ananda Yhuto Wibisono Putra; R. Ahmad Zaky El Islami; Victor M. Alasa; Jun S. Camara; William J. Triplett
International Journal of STEM Education for Sustainability Vol 6, No 2 (2026)
Publisher : Gemilang Maju Publikasi Ilmiah (GMPI) 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53889/ijses.v6i2.762

Abstract

This study aimed to develop and validate the quality of a multiple-choice instrument for measuring fifth-grade elementary students' understanding of kinetic-to-electrical energy conversion concepts within a STEAM (Science, Technology, Engineering, Arts, and Mathematics) framework. The research employed a Design and Development Research (DDR) approach with systematic instrument development procedures comprising: literature review and blueprint development, item construction, expert validation, field testing with 28 fifth-grade students, and comprehensive psychometric analysis. The instrument consists of 20 multiple-choice items covering three knowledge dimensions: conceptual (5 items), procedural (10 items), and applicative (5 items). Content validity was established through expert review by three science education specialists, yielding a Content Validity Index (CVI) of 0.87. Item analysis revealed difficulty indices ranging from 0.35 to 0.85 (predominantly moderate difficulty) and discrimination indices ranging from 0.30 to 0.75 (good to excellent discrimination). Reliability analysis using Cronbach's alpha produced a coefficient of 0.82, indicating high internal consistency suitable for elementary school assessment contexts. The instrument demonstrates satisfactory psychometric properties aligned with standards for elementary science assessment and effectively integrates STEAM pedagogical approaches.
Student Cognitive Analysis in STEAM-Based Pre-Vocational Experiential Learning at the Elementary Level Rusdi Febriyanto; Ade Dwi Putra Janata; Ananda Yhuto Wibisono Putra; Ricky Cahyasari Putra; Ikhsanudin Ikhsanudin; R. Ahmad Zaky El Islami; Nguyen Van Bien; Ahmet Selçuk Akdemir
International Journal of STEM Education for Sustainability Vol 6, No 2 (2026)
Publisher : Gemilang Maju Publikasi Ilmiah (GMPI) 

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53889/ijses.v6i2.758

Abstract

The Making Indonesia 4.0 program requires an educational system that fosters transdisciplinary, contextual, and practical learning to improve technical literacy and promote environmental sustainability. This study is aimed to assess the effectiveness of STEAM-based pre-vocational experiential learning in improving the cognitive abilities of primary school children. This study employed a quantitative, quasi-experimental One-Group Pretest-Posttest design. The study involved 27 fifth-grade primary school students selected through a purposive sampling technique. The results showed that the average pre-test score for students was 54.70, and most of them fell into the medium range (51–75). After STEAM-based learning was put into place, the average score on the post-test went up to 72.66, and most students moved up to the high group (76–100). According to Hake's criteria (1999), the N-Gain analysis showed an average value of 0.40, which means it was moderate. The Paired Sample t-Test also showed a significance value of p = 5.75 × 10⁻⁷ (0.05), which means that the learning outcomes improved in a statistically significant way. Thus, it can be deduced that STEAM-oriented pre-vocational experiential learning is comparatively beneficial in augmenting students' cognitive abilities. This method positively influences learning outcomes descriptively and is empirically validated, rendering it pertinent for use as a contextual learning technique to enhance 21st-century capabilities in primary education.
Co-Authors Ade Dwi Putra Janata Ahmet Selçuk Akdemir Ananda Yhuto Wibisono Putra Atmojo, Dion Daroe Catoer Bambang Subali Bambang Subali Bunga Rahmania Daddy Darmawan Edi Istiyono Elfajry, Ano Efrian Febnesia, Helleni Hadiyanti, Puji Hamid Abdillah Heri Retnawati Hidayatullah Hidayatullah Iman, Atep Jun S. Camara Karta Sasmita Memi Almizi Mohammad Ariansyah Sahputra Muhammad Agus Hardiansyah Muhammad Nurtanto Nguyen Van Bien Nova Triani Novaliah Novaliah Nulhakim, Lukman Nurlela Nurlela Puji Hadiyanti R. Ahmad Zaky El Islami R. Ahmad Zaky El Islami Raffi Rajwaa Rahmat Syah Ricky Cahyasari Putra Rusdi Febriyanto Sasmita, Karta Septi Kurniasih Sri Kuswantono Sulaeman Deni Ramdani Syamsuddin, Syaiful Victor M. Alasa William J. Triplett