While the impact of behavioural and cognitive processes on online information searching behaviours have been studied in some depth, little is known about the impact of procedural and metacognitive processes on online information searching behaviours. In addition, although the literature contains studies examining online information searching behaviours based on experience, cognitive styles, and task complexity separately, there is only a limited number of studies that investigate how online information searching behaviours vary depending on individual characteristics by taking task complexity as a basis. The aim of this study is to explore whether university students' information searching behaviours, task completion times, and task completion rates in simple and difficult tasks differ depending on information searching experience and cognitive style. The study was conducted with a sample of 20 university students. The results of this study indicated that in difficult search tasks, online information searching experience is influential on the exhibition of online information searching behaviours associated with the metacognitive domain. In simple and difficult tasks, experience and cognitive styles cause differentiation in online information searching behaviours. When task complexity is taken as a basis, the experience is more influential on task completion time and task completion rate compared to cognitive styles.