Penelitian ini bertujuan untuk: 1). Mengetahui seberapa besar pengaruh self-efficacy terhadap hasil belajar; 2). Mengetahui seberapa besar pengaruh self-efficacy terhadap self-regulated learning; 3). Mengetahui seberapa besar pengaruh self-efficacy terhadap hasil belajar matematika siswa melalui self-regulated learning, di kelas VII SMP Negeri 8 Tarakan.
Jenis penelitian ini adalah penelitian ex-post facto yang bersifat kausalitas. Adapun teknik pengumpulan data dalam penelitian ini adalah menggunakan angket dan dokumentasi. Populasi data dalam penelitian ini adalah siswa kelas VII, dari kelas VII-1 sampai VII-7. Sampel dalam penelitian ini berjumlah 153 siswa diambil dengan menggunakan teknik cluster random sampling. Teknik analisis data menggunakan analisis regresi. Penelitian ini dilakukan pada semester ganjil tahun ajaran 2017/2018.
Hasil penelitian menunjukkan bahwa: 1). Terdapat pengaruh yang signifikan self-efficacy terhadap hasil belajar matematika, dengan persamaan dan pengaruh sebesar 49%; 2). Terdapat pengaruh yang signifikan self-efficacy terhadap self-regulated learning, dengan persamaan dan pengaruh sebesar 58,7%; 3). Terdapat pengaruh yang signifikan self-efficacy terhadap hasil belajar matematika siswa SMP Negeri 8 Tarakan melalui self-regulated learning, dengan persamaan, dan pengaruh total sebesar 84,3%. Dalam penelitian ini terjadi mediasi sempurna (perfect mediation) dalam hubungan self-regulated learning antara self-efficacy dan hasil belajar melalui self-regulated learning.

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

This research aims to know: 1). how much effect of self-efficacy on self-regulated learning; 2). effect of self-efficacy on mathematic students achievement; 3). effect of self-efficacy on mathematic students achievement through self-regulated learning on Seventh Grade of SMP Negeri 8 Tarakan. This type of research is the ex-post facto nature of causality. The data collection techniques used in this research were questionnaires and documentation. The population of the study was all class of sventh grade in SMP Negeri 8 Tarakan, for VII-1 to VII-7. The sample of this study were 153 students who were taken randomly by cluster random sampling technique. The data were analyzed by regression. This research was conducted in the first semester of the academic year 2017/2018. The findings showed that: 1). There were significance effects of self-efficacy on mathematic achievement, with equation, and total effect is 49%. 2). There were significance effects of self-efficacy on self-regulated learning, with equation, and total effect is 58,7%. 3). There were significance effects of self-efficacy on mathematic achievement on the seventh grade students of SMP Negeri 8 Tarakan through of self-regulated learning, with equation, and total effect is 84,3%. The mediation effect on this research is perfect mediation in relation self-regulated learning of self-efficacy on achievement. Keywords: Self-Efficacy, Self-Regulated Learning, and Mathematic Students Achievement