Men_endez et al. (2008) found that 17% of students estimated they used a computer daily for 6e8 h. The type of computer that students use has also been considered. Noack-Cooper, Sommerich, and Mirka (2009) reported that 52% used only desktop computers and 4.3% used only a laptop. Smith, Salaway, and Borreson Caruso (2009) described how the proportion of students who own a laptop has been
increasing over time. Hamilton et al. (2005) found that desktop computers were used for longer (50% of time) compared to laptops (15.3% of time).