MATHEMATICAL COMMUNICATION ABILITY OF SENIOR HIGH SCHOOL STUDENTS IN SOLVING MATHEMATICS PROBLEMS REVIEWING FROM SELF-CONFIDENCE

Kemampuan komunikasi matematis adalah kemampuan siswa dalam menyampaikan ide matematika baik dalam tulisan maupun secara lisan. Kemampuan komunikasi matematis perlu ditumbuhkan dalam diri siswa agar dapat menyampaikan ide dan pemikirannya terhadap suatu konsep tertentu. Penelitian ini bertujuan untuk mendeskripsikan kemampuan komunikasi matematis siswa SMA dalam menyelesaikan masalah matematika pada materi program linear ditinjau dari self-confidence. Jenis penelitian yang digunakan adalah penelitian deskriptif kualitatif. Subjek dalam penelitian ini berjumlah 3 orang siswa dimana subjek diperoleh dari penyebaran angket self-confidence kepada 32 orang siswa kelas XI IPA 5 pada salah satu SMA di Sidoarjo yang dipilih masing-masing satu siswa dengan self-confidence tinggi, sedang, dan rendah. Teknik pengumpulan data menggunakan  2 butir soal tes esai materi program linear, angket self-confidence, dan wawancara. Data yang diperoleh kemudian dianalisis berdasarkan indikator kemampuan komunikasi matematis melalui tiga tahapan yaitu kondensasi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa siswa dengan self-confidence tinggi mempunyai kemampuan komunikasi matematis yang tinggi dan mampu memenuhi semua indikator kemampuan komunikasi matematis. Siswa dengan self-confidence sedang dan rendah memiliki kemampuan komunikasi matematis sedang dan memenuhi dua indikator kemampuan komunikasi matematis. Siswa dengan self-confidence sedang hanya mampu memenuhi dua indikator yaitu Drawing dan Written Text, sedangkan siswa dengan self-confidence rendah memenuhi dua indikator yaitu Mathematical Expression dan Drawing. Oleh karena itu, guru diharapkan dapat meningkatkan kemampuan komunikasi matematis siswa dengan memperbanyak kegiatan diskusi bersama, presentasi, sesi tanya jawab antara guru dengan siswa dan siswa dengan siswa serta memberikan banyak latihan soal kepada siswa agar self-confidence yang dimiliki siswa juga meningkat.

Kata Kunci: Kemampuan Komunikasi Matematis, Self-Confidence, Program Linear. 

Mathematical communication ability is the ability of students to convey mathematical ideas both in writing and orally. Mathematical communication skills need to be cultivated in students so that they can convey their ideas and thoughts on a certain concept. This study aims to describe the mathematical communication skills of senior high school students in solving mathematical problems on linear program material in terms of self-confidence. The type of research used is descriptive qualitative research. The subjects in this study amounted to 3 students where the subject was obtained from distributing self-confidence questionnaires to 32 students of class XI IPA 5 at one high school in Sidoarjo, each of whom has been selected as high, medium, and low self-confidence. The data collection technique uses 2 essay test items for linear programming, self-confidence questionnaire, and an interview. The data obtained was then analyzed based on indicators of mathematical communication skills through 3 steps, namely data condensation, data presentation, and drawing conclusion. The results showed that students with high self-confidence had high mathematical communication skills and were able to meet the all indicators of mathematical communication skills. Students with moderate and low self-confidence have moderate mathematical communication skills and fulfill two indicators of mathematical communication skills. Students with moderate self-confidence are only able to meet two indicators, namely Drawing and Written Text, while students with low self-confidence meet two indicators, namely Mathematical Expression and Drawing. Therefore, teachers are expected to improve students' mathematical communication skills by increasing group discussion activities, presentations, question and answer sessions between teachers and students and students and students as well as providing lots of practice questions to students so that students' self-confidence also increases.

Keywords: Mathematical Communication Skills, Self-Confidence, Linear Programming.