Comment As a lecturer (Score 2) 86
If I am presenting material I know well, I can "split" my attention, to do some quality control. One half of me goes on lecturing, while the other half is evaluating the presentation. Speaking clearly and loud enough? Too many ums and ahs? Looking at the students enough? Is the board work neat enough? Etc.
I don't do this often, because it is a really weird feeling and shifting back into just one "me" is a strange lurch.