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Rika Mulyati Mustika Sari

Universitas Singaperbangsa Karawang

Author-ID : 3219417

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Mathematics Neuroscience Nursing Physics Public Health Social Sciences Veterinary Other

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HUBUNGAN SELF-EFFICACY DENGAN KEMAMPUAN BERPIKIR KREATIF MATEMATIS SISWA SMK PADA MATERI TRIGONOMETRI Lestari, Nopiyanti Dara; Mustika Sari, Rika Mulyati; Zulkarnaen, Rafiq; Aini, Indrie Noor
EDU-MAT: Jurnal Pendidikan Matematika Vol 14, No 1 (2026)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/edumat.v14i1.24471

Kemampuan berpikir kreatif matematis merupakan salah satu keterampilan berpikir tingkat tinggi (HOTS), yang penting dikembangkan dalam pembelajaran abad ke-21. Namun, kemampuan tersebut masih tergolong rendah dan diduga berkaitan dengan faktor psikologis siswa, salah satunya self-efficacy. Penelitian ini bertujuan untuk mengetahui hubungan antara self-efficacy dengan kemampuan berpikir kreatif matematis siswa SMK materi trigonometri. Penelitian menggunakan penedekatan kuantitatif dengan desain korelasional. Populasi penelitian adalah 288 siswa kelas X SMK Negeri Batujaya Kabupaten Karawang tahun ajaran 2025/2026, dengan sampel sebanyak 167 siswa menggunakan rumus Slovin. Instrumen penelitian meliputi tes kemampuan berpikir kreatif matematis dan angket self-efficacy yang telah teruji validitas serta reliabilitasnya serta wawancara semi terstruktur. Analisis data menggunakan uji korelasi Product Moment Pearson. Hasil penelitian menunjukkan adanya hubungan positif yang sangat kuat antara self-efficacy dan kemampuan berpikir kreatif matematis siswa, dengan nilai koefisien korelasi ? = 0,854 dan signifikansi ? < 0,001. Hal ini menunjukkan bahwa semakin tinggi self-efficacy siswa, semakin tinggi pula kemampuan berpikir kreatif matematisnya. Kata kunci: Self-efficacy, kemampuan berpikir kreatif matematis, korelasi, trigonometri Abstract: Mathematical creative thinking ability is one of the higher-order thinking skills (HOTS) that needs to be developed in 21st-century learning. However, this ability is still relatively low and is assumed to be related to students’ psychological factors, particularly self-efficacy. This study aims to determine the relationship between self-efficacy and vocational high school students’ mathematical creative thinking ability on trigonometry material. The research employed a quantitative approach with a correlational design. The population consisted of 288 tenth-grade students of SMK Negeri Batujaya, Karawang Regency, in the 2025/2026 academic year, with a sample of 167 students selected using the Slovin formula. The research instruments included a mathematical creative thinking test, a self-efficacy questionnaire that had met validity and reliability criteria, and semi-structured interviews. Data were analyzed using the Pearson Product-Moment correlation test. The results showed a very strong positive relationship between self-efficacy and students’ mathematical creative thinking ability, with a correlation coefficient of r = 0.854 and a significance level of p < 0.001. This indicates that higher self-efficacy is associated with higher mathematical creative thinking ability. Keywords: self-efficacy, mathematical creative thinking ability, correlation, trigonometry.

Pengaruh Deep Learning terhadap Kemampuan Pemecahan Masalah Geometri Siswa Kelas IX Saeful Hamzah, Karto; Sari, Rika Mulyati Mustika; Zulkarnaen, Rafiq
Jurnal Pendidikan Matematika RAFA Vol 12 No 1 (2026): Jurnal Pendidikan Matematika RAFA
Publisher : Program Studi Pendidikan Matematika, Universitas Islam Negeri Raden Fatah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/jpmrafa.v11i2.32146

Penelitian ini bertujuan untuk mengetahui pengaruh penerapan pembelajaran deeplearning terhadap kemampuan pemecahan masalah matematika siswa pada materi geometri kelas IX SMP. Penelitian ini menggunakan pendekatan kuantitatif dengan metode ex post facto, yaitu penelitian yang mengkaji hubungan sebab-akibat berdasarkan data yang telah terjadi tanpa memberikan perlakuan langsung terhadap variabel. Subjek penelitian terdiri atas siswa kelas IX di SMPN Satu Atap 1 Jayakerta Kabupaten Karawang yang telah menerapkan pembelajaran mendalam dan sudah mempelajari materi geometri. Data dikumpulkan melalui tes kemampuan pemecahan masalah dan dokumentasi hasil belajar siswa. Hasil penelitian menunjukkan bahwa terdapat pengaruh signifikan penerapan pembelajaran deeplearning terhadap kemampuan pemecahan masalah geometri siswa. Hal ini menunjukkan bahwa pembelajaran mendalam memberikan pengaruh positif terhadap kemampuan analisis, penalaran, dan refleksi siswa dalam memahami konsep geometri.

Strategi Pemecahan Masalah Geometri Siswa SMP Berdasarkan Gender dan Fase Polya Suryaningsih, Eka Irmas; Zulkarnaen, Rapiq; Sari, Rika Mulyati Mustika; Nur, Iyan Rosita Dewi
JagoMIPA: Jurnal Pendidikan Matematika dan IPA Vol. 6 No. 2 (2026): JagoMIPA: Jurnal Pendidikan Matematika dan IPA
Publisher : Yayasan Pendidikan Bima Berilmu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53299/jagomipa.v6i2.4281

Studi ini difokuskan untuk mengkaji adanya perbedaan kapabilitas murid laki-laki dan perempuan dalam menuntaskan permasalahan matematika pada topik geometri bangun datar dengan mengacu pada langkah-langkah pemecahan masalah menurut Polya. Metode yang diterapkan adalah pendekatan kuantitatif dengan rancangan komparatif berbasis potong lintang (cross-sectional). Partisipan penelitian berjumlah 158 murid kelas VIII SMP, yang terdiri dari 79 murid laki-laki serta 79 murid perempuan. Alat pengumpulan data yang digunakan berupa tes esai pemecahan masalah matematika yang dirancang sesuai dengan empat fasean Polya, meliputi fase memahami permasalahan, menyusun rencana penyelesaian, melaksanakan strategi yang telah dirancang, serta melakukan peninjauan ulang terhadap hasil yang diperoleh. Selanjutnya, data diolah melalui analisis statistik deskriptif, pengujian normalitas memakai Shapiro–Wilk, serta uji beda Mann–Whitney U. Temuan penelitian mengindikasikan jika ada perbedaan yang bermakna dalam kapabilitas dalam pemecahan masalah matematika antara murid laki-laki dan perempuan pada tingkat signifikansi 0,05 dengan kategori effect size sedang. Perbedaan tersebut paling menonjol pada fase memahami persoalan dan mengevaluasi kembali hasil, sementara pada fase pelaksanaan rencana, kedua kelompok memperlihatkan tingkat kapabilitas dalam yang cenderung setara. Murid perempuan cenderung lebih konsisten dalam mengidentifikasi informasi penting pada soal dan melakukan verifikasi terhadap jawaban yang diperoleh. Temuan ini memperlihatkan jika variasi kapabilitas dalam pemecahan masalah matematis tidak hanya berkaitan dengan penguasaan prosedur, tetapi juga dipengaruhi oleh strategi kognitif dan metakognitif. Sebabnya, kegiatan edukasi matematika perlu dirancang dengan menekankan aktivitas reflektif dan penguatan strategi penyelesaian masalah secara sistematis.

Systematic Literature Review: Penggunaan GeoGebra Terhadap Kemampuan Berpikir Kreatif Peserta Didik Dalam Pembelajaran Matematika Sahira, Adinda; Nur, Iyan Rosita Dewi; Sari, Rika Mulyati Mustika
FARABI: Jurnal Matematika dan Pendidikan Matematika Vol 8 No 1 (2025): FARABI: Jurnal Matematika dan Pendidikan Matematika
Publisher : Program Studi Pendidikan Matematika FKIP UNIVA Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/farabi.v8i1.906

Learning mathematics today has many variations in learning, one of which is by using GeoGebra Software in learning mathematics. Mathematics in school learning requires the ability to reason, analyze calculations, and imagine in accordance with the ability to think creatively. The purpose of this research is to conduct a literature review related to Creative Thinking Ability in Junior High School Mathematics Learning. The method used in this research is SLR (Systematic Literature Review) on “Use of GeoGebra” and “Creative Thinking Ability” published in the last ten years from sinta and scopus indexed journals in Google Scholar. This study was guided by the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) which resulted in 14 (fourteen) research articles to be systematically reviewed in 2014-2024 which were selected based on inclusion and exclusion criteria. The results showed that the use of GeoGebra on Creative Thinking Ability in Mathematics Learning was proven to significantly improve the ability of students with the application of learning models or not than conventional learning models.

Comparative Study: Differences in Students' Geometric Reasoning Viewed from Van Hiele's Levels of Geometric Thinking Thiara Ayu Sheila; Rika Mulyati Mustika Sari; Rafiq Zulkarnaen; Iyan Rosita Dewi Nur
PRISMA Vol. 15 No. 1 (2026): PRISMA
Publisher : Universitas Suryakancana

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

This study aims to determine the differences in students' geometric reasoning in terms of Van Hiele's thinking levels in spatial geometry. This study used an ex post facto method with a quantitative approach. The population of this study was ninth-grade female students at SMP Negeri 2 Majalaya, with a sample of 86 students selected using simple random sampling. Data were obtained through diagnostic tests, geometric reasoning tests, and unstructured interviews with several samples. This study uses several inferential statistical tests such as normality tests, homogeneity tests, and ANOVA. The results of this study indicate that there are significant differences between the geometric reasoning abilities of students at level 0 and level 1, as well as between level 0 and level 2. The number of students classified as level 0 (visualization) is 69.77%; level 1 (analysis) is 24.42%; and level 2 (informal deduction) is 5.81%. No students were classified as level 3 or 4.

Analysis of Class X Students' Mathematical Problem-Solving Abilities in Completing Arithmetic Sequences and Series Material Juniantika, Muhammad Ikhsan; Sari, Rika Mulyati Mustika
Journal of Mathematics and Mathematics Education Vol 14, No 2 (2024): Journal of Mathematics and Mathematics Education (JMME)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jmme.v14i2.82093

This research aims to assess students' mathematical problem-solving abilities regarding arithmetic sequences and series. The research was conducted in one high school of Karawang district, where a total of 35 students were taken from a single class. From the data collected, it was found that 25 students, which accounts for 71.4%, had medium-level mathematical problem-solving abilities, while 5 students, each from the high and low categories, accounted for 14.3% respectively. The researchers selected three students as samples to analyze each indicator of their mathematical problem-solving abilities. The study results indicate that students in the low category have not achieved the indicators of planning and checking again. Students in the medium category have not reached the indicators of checking again, while students in the high category have achieved all the indicators of mathematical problem-solving ability. The average indicator score for all students in the research is 46%, which is still low.

Creative Thinking Ability of Vocational School Students in Contextual Trigonometry Learning Using Futsal Adinda Sahira; Kiki Nia Sania Effendi; Rika Mulyati Mustika Sari
Journal of General Education and Humanities Vol. 5 No. 2 (2026): April
Publisher : MASI Mandiri Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58421/gehu.v5i2.1264

This study explores the limited use of contextual approaches in fostering creative thinking in trigonometry learning. This study aims to determine the difference in creative thinking test scores of vocational high school students before and after learning trigonometry in the context of futsal. This study used a quantitative method with a pre-experimental design and a one-group pretest-posttest form, with 27 tenth-grade students as the sample. The instrument used was a mathematical creative thinking ability test with futsal-contexted trigonometry material. Data analysis included descriptive statistics, the Shapiro-Wilk normality test, the Wilcoxon test, and N-Gain. Descriptive results showed that creative thinking ability was in the moderate range (63%) and increased from 41.81 to 77.26 between the pretest and posttest. The Wilcoxon test showed that Ho was rejected and Ha accepted, indicating a difference in creative thinking skills before and after the treatment (0.000 < 0.05), with an N-Gain score of 0.77. Therefore, it was concluded that the futsal sports context in trigonometry material yielded good results, with a noticeable difference before and after classroom learning.

Co-Authors Abidah, Iffah Adinda Sahira Aini, Indrie Noor Ardiyanti, Yusi Aziza, Asya Khaula Bambang Avip Barkah, Siti Chandra Zuliady Dadang Fakhruddin Dadang Fakhruddin Dadang Juandi Dewi Nur, Iyan Rosita Dori Lukman Hakim Effendi, Kiki Nia Sania firliani Ginda M.A.Siregar Haerudin Hanifah Nurus Sopiany Hanifah Sopiany HASAN, IBRAHIM Hendra Kartika, Hendra Iik Nurhikmayati, Iik Ika Yunitasari Indra Budiman Irena Puji Luritawaty Iyan Rosita Dewi Nur Jarnawi Afgani Dahlan Juniantika, Muhammad Ikhsan Juniantika, Muhammad Ikhsan Karina Chintya Lestari Kiki Nia sania Effendi Krida Singgih Kuncoro Latifah Tazkiyatunnisa Lessa Roesdiana Lestari, Nopiyanti Dara Mochammad Imron Awalludin Muhijah, Iim Nanang Priatna Nur, Iyan Rosita Dewi Nurtiana, Nadya Nurul Isnani Setyaningrum Pratiwi, Tarizka Ozzi Rafiq Zulkarnaen Rahman, Ratu Firdausi Rahmat Iqbal Roesdiana, Lessa Saeful Hamzah, Karto Safitri, Ajeng Dwiyani Sahira, Adinda Saripudin Saripudin Sartika, Nenden Suciyati SENDI FAUZAN Sopiany, Hanifah Sopiyani, Hanifah Nurus Suheni, Eni Suryaningsih, Eka Irmas Thiara Ayu Sheila Yadav, Dharmendra Kumar Zulkarnaen, Rapiq Zulnaidi, Hutkemri

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