We're not machines, with a steady supply of cognitive resources on command. (huffingtonpost.com)
Because learners aren't fighting the interface, they have more cognitive resources for learning what the lesson or course is trying to teach. (elearningindustry.com)
Keeping your to list in your head uses up valuable cognitive resources, and can trigger stress reactions, so it is best to keep it on paper or on your computer. (slaw.ca)