The purpose of this study was to investigate the relationship between students' opinions about the sources of self-efficacy belief and their gender, academic achievement, the grade level, Socio-Economic Status (SES), and learning style. The study was conducted on 984 secondary school students in the fall semester of the 2011-2012 academic year. The data were collected by the scale of determining sources of self-efficacy belief, the scale of learning styles, the scale of self-efficacy belief related learning and performance which is subscale of MSLQ and personal information form. The results of the study indicated that there were significant relationships between students' opinions about sources of self-efficacy related learning and performance and their gender, academic achievement, SES, the grade level, and learning style.