Studies have shown that typing notes requires shallower levels of cognitive processing than handwriting, as subjects often tend to type verbatim what they hear without really engaging with its substance to the level that is required for greater understanding and better recollection.
In contrast, handwriting appears to be more cognitively demanding. According to these studies, subjects who use handwriting are generally forced to rephrase what hear into their own words, thus creating “more effective memory cues by recreating the context (e.g., thought processes, emotions, conclusions) as well as content (e.g., individual facts) from the original learning session”. The evidence against typing your notes is pretty compelling.
Tablets introduce another level of complexity to this problem, since they can be used both to type and handwrite notes. So what are we to do? Are we to avoid using the tablets and stick to pen and paper? If we do use tablets for note taking, are we to force students to handwrite notes on their tablets using a stylus? And are we to ban students from typing up notes on their tablets? After all, that is what the research appears to suggests."
Via John Evans