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I think your comment about the transient nature of the information on the screen is important, but reverse it: there is an expectation in our modern lives that information will always be there. I think our brains instinctively categorise a lot of information (especially that read off screens) as unimportant (don't need to remember) because (we assume) if we ever need it again we can just bring it back up.
Of course, any of us that have been around for a while know that information on devices really can be transient. Some stuff hangs around an embarrassingly long time, other stuff disappears or gets lost amidst the deluge of our modern information-heavy society.
To counter this (and the technique applies well to paper as well) requires constant testing. Not in the nature of "here's a test, kids", but in questions or puzzles or other activities that entice the participant to recall what they've just learned - very soon after reading it, and then again later. This becomes an "I'm gonna need this information" trigger than helps our minds push the data into long term storage.
Note that even just structuring the presentation correctly can provide the same effect as explicit questions. (Crime/mystery novels offer an example: pay attention to the details as they go past and you can solve the crime with the main protagonist.)
Think of that old saying: use it or lose it. Make it so the participant is using the information they are learning and they will keep it; conversely, if you just keep loading up more information without ever using it then the person will discard it as irrelevant.
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