“…The ANOVA test obtained a significance of 0.467 > 0.05, meaning that there was no difference in students' ability to write opinion essays in the three groups on their self-efficacy with the application of the developed GO (See Table 7). This result contradicts several previous studies which found a relationship between academic achievement and selfefficacy, where high-achieving students have high self-efficacy, and vice versa (Boroumand et al, 2020;Eissa, 2012;Estacio, 2021;Nobahar et al, 2013). Likewise, the application of GO in courses increased students' learning outcomes from low and moderate to moderate and high levels, along with an increase in self-efficacy (Boroumand et Based on the results above, no correlation was found between students' writing ability and their self-efficacy.…”