QuizzaciousOtter

If I’m actually reading with the goal of thorough understanding then it will take as long as reading it aloud or longer. I can still skim through the text faster, but I will understand less of it.

The Wikipedia article on subvocalization has a section on speed reading. It seems that subvocalizing can in fact limit the reading speed.

This is not a good explanation because as someone already pointed out a lot of (most?) people do “read the words aloud in their head”. For me, I often even make tiny moves of my tongue and larynx - see subvocalization.