Reviewing printed vs on screen documents

I have observed interesting phenomena: reviewing printed document reveals more mistakes in text than looking on the same document on computer screen. And I think I'm not alone - I've seen other people had same problem too.

It has to be something with focus on a task of document reviewing and ability to concentration in given context. Computer screen vs paper document. What is this all about? Is paper document better to read? I think it's related with casual context related with each of the media.

My computer (screen) context is something like:

• work (reading, writing, drawing, programming),
• news,
• learning,
• entertainment (movies, games),
• sharing some functions with TV,
• promotes multitasking,
• contains more chaotic and less quality content that needs more filtering and preprocessing

Paper context:

• books (facts and fiction),
• documents (more important and less like just printed electronic versions for convenience),
• better quality content that needs focus.

Time spent at each media is about 95% for computer screen and 5% for paper, so rare paper usage can make it potentially more interesting for brain too.

While using computer I'm doing many things while multitasking, and filtering low quality information that is reducing deep focus. Paper media in comparison switches my consciousness into context that makes me more deeply focused, less distracted (no multitasking), and and that makes me finding fine text errors easy. I don't even need to think about it, it's how my brain programmed itself in choosing proper context. It's not strange that computers (and Internet) turn me into "information trash" mode when I can't see details.

I'm not mentioning eye-strain effect, because of good modern LCD screens and readers using electronic paper so impact is small and difference between media in that area is vanishing.

Idea, how to stay focused on text without paper version of document, is to read text in simple non distracting computer environment like full screen mode, no other windows, bells and whistles (easy), and treating it like high quality content with meaning (that's harder). It may need some time to rewire brain, but probably that's the way to go.