“…Moreover, people's beliefs about the nature of knowledge and learning are of effect on variables such as academic performance, new information processing methods, their level of understanding, source of control, strategies used in the study, higher order thinking, self-regulatory processes, approaches of problem solving and the time and effort they spend for learning (9-14, 15, 16, 17, 18, 19). In particular, researches on the intertwined relationship between the use of multiple sources and the mental processes associated with epistemic beliefs have been very fruitful in recent decades (20,21,22,23,24).…”