Many studies report information overload as one of the main problems that students encounter in online learning via computer-mediated communication. This study aimed to explore the sources of online students' information overload and offer suggestions for increasing students' cognitive resources for learning. Participants were 12 graduate students from two online courses in the United States. Their learning experiences in both online discussions and on the course website were explored through semi-structured interviews. They also completed a background questionnaire that assessed three constructs that limit learner readiness and are likely to lead to online students' perceived information overload: inadequate prior knowledge, inadequate English proficiency, and lack of technical skills for participating in computer-mediated communications. The findings suggest that varied learner characteristics led some students to be more susceptible than others to information overload. Emerging data-driven risk factors were: lack of efficiency in reading from computer screens, visual and auditory learning preferences, and time constraints. Difficulties associated with students' perceptions of information overload are addressed and implications for course design are offered.Keywords: information overload; computer-mediated communication; cognitive load theory; online discussion Introduction With increases in Internet communication technologies, online learning has grown rapidly through the use of computer-mediated communication (CMC). CMC uses telecommunication technologies such as email, real-time chat, computer conferencing/online discussion systems, and online databases to support human communication between spatially separated learners (Jonassen et al. 1995). Although CMC can support teaching and learning by making information and communication easily accessible via computer networks, one of the main problems caused by the medium is information overload (IO) (Burge 1994;Eastmond 1995;Harasim 1987;Kear and Heap, 2007;Paulo 1999;Vonderwell and Zachariah 2005). IO becomes a problem when students simultaneously face having to acquire the technical skills necessary to participate in CMC and manage a large volume of information both on the course website and through computer conferencing (Harasim 1987). Numerous studies have investigated the problem of IO in the disciplines of organisation science, marketing, accounting, management information systems, business management, and psychology (for reviews, see Edmunds and Morris 2000;Eppler and Mengis, 2004;Klausegger, Sinkovics, and Zou 2007). Yet little research has been dedicated to investigating the problem of IO per se in online education as other disciplines have done. This study thus aimed to explore the sources of online students' IO and accordingly offer suggestions for increasing students' cognitive resources for learning.
Theoretical frameworkCognitive load theory Cognitive load theory may provide a basis for understanding the concept of IO in this study. The theory consis...