Investigating high school EFL learners' self-efficacy beliefs in the online learning environment

English is the most widely used language in our developed world for all work, research, and also in some communities. As a result, learning English has become a must in virtually every country in order to have good position and a reasonable income. Unfortunately, this requirement may have an effect on English as a Foreign Language (EFL) learners' experiences and opinions on learning. Although some of them can concentrate on learning a second language regardless of where they are learning, others will be influenced by their learning environment. Although some of them can concentrate on learning a second language regardless of where they are learning, others will be influenced by their learning environment. Nowadays, the online learning environment is becoming increasingly common in Turkey. Most educational institutions have indeed attempted to improve the efficiency of online learning resources in order to maximize learners' confidence and self-efficacy. Furthermore, they want to make it easier for EFL learners to understand and evaluate their own skills in an online learning environment. This research will be conducted for the topic ''The Investigation of EFL Learners' Self-efficacy Beliefs in the Online Learning Environment''. This study will also be taken into consideration in terms of demographic factors. High school EFL learners' gender, age, their English level, will be the demographic factors in the study. In order to measure ESBS, the questionnaire will be applied which is prepared by Yanar (2012). Moreover, a semi-structured interview will be done with the participants to understand their opinions about self-efficacy during online language learning. The study will be conducted in a high school in Mersin, Turkey. The analyzed results will be presented in the study.