When I did my teacher training fifteen or so years ago, we were told that information that was written down by hand was retained for longer than information that was typed. This article seems to correlate with what I was taught.
However, there's no underlying theory to anything in psychology. Psychologists come up with things they call theories, but when you look at them a bit more closely, they're 'just-so stories' that happen to fit some experimental results. The experimental results themselves are shallow correlations between inputs and outputs. Prod the brain in this specific way, and see how it responds. EEG experiments like the one linked only tell us what bits of the brain respond to what stimuli; we don't know what's actually going on in forming a response to that stimulus.
You can point to the ethics protocols by which experimenters are bound to not harm their subjects - these are important and worthy. You can point to the advertising industry's use of psychology to improve its effectiveness, but this is itself a shallow endeavour. As far as improving our understanding the brain as a physical system, the discipline of psychology is much activity with little achievement.