Note: the people reading paper books were allowed to adjust their position and the book's position while reading. The people reading the "LE-eBook" (i.e.: iPad

Note: the people reading paper books were allowed to adjust their position and the book's position while reading. The people reading the "LE-eBook" (i.e.: iPad) were forced to do their reading with the iPad locked into position and the brightness turned to maximum, for four hours. I find it hard to accept the study's findings that it was "use of these devices [that] prolongs the time it takes to fall asleep," rather than, say, having a bright light shone in your eyes and not being allowed to shift position while reading for four hours. The iPad's brightness can be turned down much lower than an equivalent paper book illuminated by a reading lamp. Even better, the iPad's illumination will not disturb your sleeping partner as much as a bed lamp (the latter illuminates the whole room). I'd like to see this study repeated with paper books vs paper books, with books fixed in place on the table, and one group's books illuminated with a spotlight providing equivalent illumination to the reader's face as the maximum-brightness iPad. Then run a parallel study with all readers using iPads, with some having the brightness fixed to maximum and others free to adjust brightness to their own comfort.