[timwaagh]

I'm aware of this kind of research existing. I guess my personal experience does not count as a scientific work. However it's not study on math and math is not normal reading. It's anything but. You need to understand every symbol, place it in context and do all of the proofs in your head so you can get some feel for it. If you are copying you are not doing this. I'm a terrible hand writer. I have a math degree.

[cratermoon]

Oh, but everything I know about learning mathematics tells me that doing problems, on paper, is key. That means writing them out. I'm sorry you think you're not a good hand writer, may I recommend Write Now: The Getty‑Dubay Program for Handwriting? You're probably not bad at it, but could use a little refinement. It really helped me improve and speed up my handwriting.