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All Journal Griya Journal of Mathematics Education and Application
Istna Hani Salami
UIN Raden Mas Said Surakarta
Education Mathematics

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Pengaruh Self Confidence terhadap Hasil Belajar Matematika Siswa Kelas 8A SMP Ta’mirul Islam Surakarta Istna Hani Salami; Fuad Lucky Atmaja
Griya Journal of Mathematics Education and Application Vol. 6 No. 2 (2026): Juni 2026
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v6i2.1109

Abstract

This study aims to analyze the effect of self-confidence on mathematics learning outcomes of grade 8A students at SMP Ta’mirul Islam Surakarta. A quantitative approach was employed with a sample of 30 students selected through simple random sampling. Self-confidence was measured using a Likert scale questionnaire (16 items) based on five Lauster dimensions, while mathematics learning outcomes were obtained from mid-semester examination (UTS) scores. Instrument validity was assessed using Spearman correlation, and reliability was tested using Cronbach’s Alpha coefficient. Results showed that all 16 items were valid (r_count > 0.361) with a Cronbach’s Alpha of 0.854, indicating very high reliability. Spearman correlation analysis yielded ρ = 0.136 with a significance value of p = 0.474 (> 0.05), and simple linear regression analysis produced a regression equation of Y = 57.4787 + 0.1498X with R Square = 0.022 and significance value of F = 0.434 (> 0.05). These results indicate that although there is a positive effect of self-confidence on mathematics learning outcomes, the effect is very weak and statistically not significant. Only 2.2% of the variance in mathematics learning outcomes is explained by self-confidence, while the remaining 97.8% is influenced by other factors, including cognitive ability, teaching methods, learning motivation, learning environment, and the context of Islamic adab-based education that characterizes the research school.
Co-Authors Fuad Lucky Atmaja