- due to the length of the stimulus text, difference could be related to issues of navigation within the document
- scrolling as it's imposing a spatial instability which may negatively affect the reader’s mental representation of the text and, by implication, comprehension
- disrupted mental maps of the text in digital group, which may be reflected in poorer understanding and ultimately poorer recall of presented material
- the dual-task involved in switching between two windows displayed on the same computer screen is likely to present additional cognitive challenges to the reader (one displaying the text to be read, the other displaying the questions to be answered)
- the common perception of digital screen presentation as an information source intended for shallow messages may reduce the mobilization of cognitive resources
- LCD computer screens like the ones used in this study are known to cause visual fatigue due to their emitting light. In contrast, ebook technologies based on electronic ink, such as Kindle and Koboo, are merely reflecting light