REPRESENTASI MATEMATIS SISWA DALAM MEMECAHKAN MASALAH MATEMATIKA

DITINJAU DARI SELF-EFFICACY SISWA

STUDENT MATHEMATICS REPRESENTATION IN SOLVING MATHEMATICS PROBLEMS

REVIEW FROM STUDENT'S SELF-EFFICACY

Penelitian ini bersifat deskriptif kualitatif yang bertujuan untuk menganalisis keterampilan representasi matematis siswa kelas 11 dalam memecahkan masalah matematika ditinjau dari self-efficacy. Representasi matematis merupakan hasil interpretasi siswa dalam menyelesaikan suatu permasalahan. Keyakinan siswa dalam mengasah kemampuan memecahkan masalah disebut sebagai self-efficacy. Tiga siswa dipilih dengan menggunakan teknik purposive sampling berdasarkan kategori self-efficacy tinggi, sedang dan rendah. Instrumen penelitian yang digunakan dalam penelitian ini, yaitu angket self-efficacy dan tes representasi matematis berupa soal pemecahan masalah. Penelitian diawali dengan pemilihan subjek melalui pengambilan data angket self-efficacy, kemudian subjek yang telah terpilih sesuai kategori self-efficacy diberikan tes representasi dan diwawancara. Data yang didapat dianalisis melalui tahapan penelitian kualitatif. Hasil penelitian menunjukkan bahwa representasi matematis siswa dengan self-efficacy tinggi dapat memecahkan masalah dengan tiga indikator kemampuan representasi visual, simbolik, dan verbal. Sedangkan representasi matematis siswa dengan self-efficacy sedang dapat memecahkan masalah dengan dua indikator kemampuan representasi visual dan verbal. Lalu, representasi matematis siswa dengan self-efficacy rendah dapat memecahkan masalah dengan satu indikator kemampuan representasi simbolik. Siswa perlu melatih diri dalam menyelesaikan soal pemecahan masalah agar mencapai kemampuan representasi yang baik dan mampu meningkatkan kepercayaan diri siswa atau self-efficacy.

Kata Kunci : representasi matematis, pemecahan masalah, self-efficacy.

This research is descriptive qualitative and aims to analyze the mathematical representation skills of grade 11 students in solving mathematical problems in terms of self-efficacy. Mathematical representation is the result of student interpretation in solving a problem. Student confidence in honing problem solving skills is referred to as self-efficacy. Three students were selected using a purposive sampling technique based on the categories of high, medium and low self-efficacy. The research instrument used in this study, namely a selfefficacy questionnaire and a mathematical representation test in the form of problem solving questions. The study begins with the selection of subjects through self-efficacy questionnaire data collection. Then subjects who have been selected according to the self-efficacy category are given a representation test and interviewed. The data obtained were analyzed through the stages of qualitative research. The results showed that the mathematical representation of students with high self-efficacy can solve problems with three indicators of visual, symbolic, and verbal representation abilities. While the mathematical representation of students with moderate self-efficacy can solve problems with two indicators of visual and verbal representation abilities. Then, the mathematical representation of students with low self-efficacy can solve problems with one indicator of symbolic representation ability. Students need to train themselves in solving problem in order to achieve good representation skills and be able to increase students' self-confidence or self-efficacy.

Keywords : mathematical representation, problem solving, self-efficacy.