It is all about "change blindness" :
https://www.youtube.com/watch?v=ZKYB-WwkqE8
In this interview, Ron Rensink from the University of British Columbia talks about the change blindness research paradigm, how it developed, the theoretical significance for theories of attention, and some interesting findings. He also talks about his concept of "mindsight" that describes the ability of a subset of participants in his studies to reliably identify the presence or absence of a change without being able to identify the nature of the change initially.
Here are a few pages from a French science magazine presenting French research about electronic reading technologies and the brain (some images and graphics are included) :
http://pvevent1.immanens.com/fr/pvPa...2232&pa=1&nu=1
They quote Charles Tijus, director of the "Laboratoire Cognitions humaine et artificielle" and director of "Lutin", the research lab I linked to before :
"Le « flash noir » qui apparaissait entre deux pages, lié à la lenteur du chargement, tend à disparaître. Ce flash, long de 1 à 3 secondes efface en partie la mémoire de l’image de la page qu’on vient de lire, un phénomène connu sous le nom de change blindness. L’attention décroche et on peine à se souvenir ce que l’on était entrain de lire."
He explains that the black flash occurring when turning a page on the screen of an e-ink reader causes change blindness. Your attention drops, and the memory of what you just read seriously decreases.