Penelitian ini bertujuan untuk mengetahui: tingkat self efficacy, metakognisi, self regulated learning dan prestasi belajar matematika siswa kelas X SMK Negeri 1 Tarakan, pengaruh self efficacy dan metakognisi terhadap prestasi belajar matematika, pengaruh self efficacy dan metakognisi terhadap selfregulated learning; pengaruh self-efficacy dan metakognisi terhadap prestasi belajar matematika siswa melalui self-regulated learning, di kelas XI SMK Negeri 1 Tarakan.
Jenis penelitan ini adalah penelitian ex-post facto yang bersifat kausalitas. Penelitian ini dilakukan pada semester ganjil tahun ajaran 2018/2019. Populasi data dalam penelitian ini adalah siswa kelas XI yang terdiri dari 10 kelas. Sampel dalam penelitian ini berjumlah 183 siswa diambil dengan menggunakan teknik proportionate stratified random sampling. Adapun teknik pengumpulan data dalam penelitian ini adalah menggunakan angket dan dokumentasi. Teknik analisis data menggunakan analisis deskriptif dan analisis regresi.
Hasil penelitian menunjukkan bahwa: Tingkat self-efficacy siswa pada kategori sangat tinggi sebesar 15,3% dan 84,7% sisanya tersebar pada kategori tinggi, sedang dan rendah, metakognisi kategori sangat tinggi sebesar 10,9% dan 89,1% sisanya tersebar pada kategori tinggi, sedang, rendah dan sangat rendah, self-regulated learning pada kategori sangat tinggi sebesar 19,7% dan 80,3% sisanya tersebar pada kategori tinggi, sedang dan rendah dan prestasi belajar matematika pada kategori sangat baik sebesar 16,4% dan 83,6% sisanya tersebar pada kategori baik, cukup, kurang dan gagal. Terdapat pengaruh yang signifikan self-efficacy dan metakognisi terhadap prestasi belajar matematika, dengan pengaruh sebesar 37,7%;. Terdapat pengaruh yang signifikan self-efficacy dan metakognisi terhadap self-regulated learning, dengan pengaruh sebesar 48,5%;. Terdapat pengaruh yang signifikan self-efficacy dan metakognisi terhadap prestasi belajar matematika siswa SMK Negeri 1 Tarakan melalui self-regulated learning, dengan pengaruh sebesar 80,6%. Dalam penelitian ini terjadi mediasi sempurna (perfect mediation) dalam hubungan self-regulated learning antara self-efficacy, metakognisi dan prestasi belajar melalui self-regulated learning.

Kata Kunci: Self-Efficacy, Metakognisi, Self-Regulated Learning, dan Prestasi Belajar Matematika

This research aims to know: level of self efficacy, metacognition, self regulated learning and, mathematies students achievement; effect of self-efficacy and metacognition on self regulated learning; effect of self-efficacy and metacognition on mathematies students achievement; effect of self-efficacy and metacognition on mathematies students achievement through self regulated learning on Eleventh Grade of SMK Negeri 1 Tarakan. The type of this research is the ex-post facto nature of causality. This research was conducted in the first semester of the academic year 2018/2019. The population of the study was all class of eleventh grade in SMK Negeri 1 Tarakan that consist of 10 classes. The sample of this study were 183 students who were taken randomly by proportionate stratified random sampling technique. The data collection techniques used in this research were questionnaires and documentation. The data were analyzed by description and regression. The findings showed that: 15,3% of students were in highest category of self efficacy and 84,7% of the rest were in high, moderate and low category, 10,9% of students were in highest category of metacognition and 89,1% of the rest were in high, moderate, low and lowest category, 19,7% of students were in highest category of self regulated learning and 80,3% of the rest were in high, moderate and low category, 16,4% of students were in highest category of mathematies student achievement and 83,6% of the rest were in high, adequate, lack and fail. There were significance effects of self-efficacy and metacognition on mathematies achievement, and total effect is 37,%. There were significance effects of self-efficacy and metacognition on self regulated learning, and total effect is 48,5%. There were significance effects of self-efficacy and metacognition on mathematies achievement on the eleventh grade students of SMK Negeri 1 Tarakan through of self-regulated learning, and total effect is 80,6%. The mediation effect on this research is perfect mediation in relation self-regulated learning of self-efficacy and metacognition on achievement. Keywords: Self-Efficacy, Metacognition, Self-Regulated Learning, and Mathematies Students Achievement